TWI904795B - Architecture system - Google Patents

Abstract

The instant disclosure provides an architecture system, which includes: an exterior building system, located at the periphery of the architecture system, the exterior building system comprising: a plurality of exterior precast columns; and a plurality of exterior precast connection structures, each including: an exterior beam-column connector, disposed on one of the exterior precast columns, the exterior beam-column connector including a first beam connecting surface, a second beam connecting surface opposite to the first beam connecting surface, and a third beam connecting surface connecting the first beam connecting surface and the second beam connecting surface and facing towards the interior of the architecture system; a first precast beam structure, connected to the first beam connecting surface of the exterior beam-column connector; and a second precast beam structure, connected to the second beam connecting surface of the exterior beam-column connector; and an interior building system, surrounded by the exterior building system, and including a plurality of interior beam-column connectors; and a plurality of interior steel beam structures, some of the interior steel beam structures each disposed between two adjacent interior beam-column connectors, and the others of the interior steel beam structures each disposed between one of the adjacent interior beam-column connectors and the third beam connecting surface of one of the precast connection structures.

Description

Building Systems

This invention provides an embodiment of a building system.

Common construction methods include RC (reinforced concrete) structures, SC (steel beams and columns covered with concrete for fireproofing) structures, and SRC (steel reinforced concrete) structures. RC (reinforced concrete) structures can be further divided into traditional on-site casting methods where concrete is poured in place, and precast methods, which have been developed in recent years and offer advantages such as superior structural quality, rapid and safe construction, and economical construction costs. Precast methods involve constructing reinforced structures and pouring concrete at a precast plant or near the construction site using standardized operating procedures and modular molds, rapidly producing large quantities of precise precast components such as columns, beams, and slabs. Through precise handling and assembly operations, precast components manufactured in the precast plant or around the construction site are assembled on-site. This reduces on-site workload, manpower, and construction time, effectively shortening the construction period while ensuring construction quality. Furthermore, the precast construction method reduces or eliminates construction on exterior scaffolding, significantly improving construction safety.

Given the advantages and disadvantages of various construction methods, hybrid construction methods are gradually being adopted. For example, combining precast column construction with traditional in-situ casting in residential building projects can leverage the strengths and weaknesses of each method. Using precast column construction for the building's exterior beam-column main structure, supplemented by traditional in-situ casting for the more intricate interior details, typically achieves the best cost-performance ratio in terms of quality, time, and finished product. In light of the development of this type of building, the industry eagerly anticipates a method for manufacturing such beam-column structures that maximizes output and provides the best quality with minimal construction steps, and the resulting beam-column structures.

To address the above issues, the disclosed embodiment employs a composite construction method, using precast beam-column structures in the outer building system and steel beams or in-situ casting as the internal beam structure in the inner building system. Therefore, compared to traditional building systems that are all manufactured using in-situ casting, the building system of the disclosed embodiment can be constructed faster, saving construction time and costs.

One embodiment of the present invention provides a building system including an outer building system, located on the periphery of the building system and including: a plurality of outer precast columns; and a plurality of outer precast connection structures, each including: an external beam-column connector disposed on one of the outer precast columns, the external beam-column connector including a first beam connection surface, a second beam connection surface opposite to the first beam connection surface, and a third beam connection surface connecting the first beam connection surface and the second beam connection surface and facing the interior of the building system; a first precast beam structure connecting the outer precast columns. The external beam-column joint includes a first beam connection surface; a second precast beam structure connecting the external beam-column joint to the second beam connection surface; an internal building system surrounding the external building system and including a plurality of internal beam-column joints; and a plurality of internal steel beam structures, some of which are disposed between adjacent internal beam-column joints, and others of which are disposed between a third beam connection surface of one of the adjacent internal beam-column joints and one of the external beam-column joints.

Another embodiment of the present invention provides a building system including an outer building system, located on the periphery of the building system and including: a plurality of outer precast columns; and a plurality of outer precast connection structures, each including: an outer beam-column connector disposed on one of the outer precast columns, the outer beam-column connector including a first beam connection surface, a second beam connection surface opposite to the first beam connection surface, and a third beam connection surface connecting the first beam connection surface and the second beam connection surface and facing the interior of the building system; a first precast beam structure connecting the first beam connection surface of the outer beam-column connector; and a third beam connection structure. Two precast beam structures, connecting the second beam connection surface of the external beam-column joint, wherein the interior of each of the first and second precast beam structures includes a longitudinal steel beam connected to the external beam-column joint; and an internal building system surrounded by the external building system, including: a plurality of internal column structures; and a plurality of internal cast-in-place beam structures, some of which are disposed between two adjacent internal column structures, and another portion of which are disposed between the third beam connection surface of one of the adjacent internal column structures and one of the external precast connection structures.

To better understand the features, content, advantages, and effects of this invention, the invention is described in detail below with accompanying drawings and examples. The drawings used are for illustrative and explanatory purposes only, and should not be interpreted or used to limit the scope of the patent application based on the proportions and arrangement of the accompanying drawings.

The terms "a" or "an" in this disclosure are used to describe the elements and components of the invention. These terms are used solely for ease of description and to provide the basic concept of the invention. This description should be understood to include one or at least one, and unless explicitly stated otherwise, the singular includes the plural. When used in conjunction with the word "comprising" within the scope of the patent application, the term "a" may mean one or more. Furthermore, the term "or" in this disclosure means "and/or".

Unless otherwise specified, spatial descriptions such as "above," "below," "upward," "left," "right," "downward," "body," "base," "vertical," "horizontal," "side," "higher," "lower," "upper," "above," and "below" are used to indicate the directions shown in the figures. It should be understood that the spatial descriptions used in this disclosure are for illustrative purposes only, and that actual embodiments of the structures described in this disclosure can be spatially configured in any relative direction without altering the advantages of the embodiments of the invention. For example, in the description of some embodiments, providing an element "on" another element can cover the situation where the former element is directly on the latter element (e.g., in physical contact with the latter element) and the situation where one or more intervening elements are located between the former and the latter elements.

As used in this disclosure, the terms “approximately,” “substantially,” “substantially,” and “about” are used to describe and take into account minor variations. When used in conjunction with an event or situation, these terms may mean a situation in which the event or situation clearly occurred or a situation in which the event or situation is very close to occurring.

The following disclosures include the use of "precast" component names (e.g., precast corner columns, precast edge columns, precast connection structures, precast beam structures, etc.) to refer to building structures manufactured using the "precast method." This method involves constructing reinforced concrete structures, such as steel cages, using standardized operating procedures and modular molds at a precast plant or construction site. This process includes building formwork and pouring concrete to rapidly and mass-produce high-precision, high-quality, and uniform structural components such as columns, beams, and slabs. Subsequently, the manufactured structural components are assembled on-site through precise handling and assembly operations. On the other hand, the structures corresponding to component names including "in-situ casting" (e.g., in-situ casting joint structure) are building structures using the traditional "in-situ casting method," which are structures completed by constructing steel reinforcement structures, building formwork, and pouring concrete on-site.

According to one embodiment of the present invention, the single-story outer building system of the building system of the present invention adopts a precast beam structure and a precast column structure, while the internal building system can adopt a precast column structure combined with steel beams or be manufactured using traditional in-situ casting methods. The outer building system includes multiple outer precast columns, multiple outer precast connection structures, and multiple corner precast connection structures. The internal building system can optionally include multiple precast column structures and connect the precast column structures and steel beams using multiple internal beam-column connectors, or all beam-column structures can be manufactured using traditional in-situ casting methods.

Figure 1 shows a schematic diagram of the building system 1 in the first embodiment of the present invention, and Figure 2 shows a schematic diagram of a portion of the structure of the building system 1 in Figure 1. The building system 1 includes an outer building system 10 and an inner building system 20. The outer building system 10 is located at the periphery of the building system and includes a plurality of outer precast connection structures 11, a plurality of corner precast connection structures 15, and a plurality of outer precast columns 19 (Figure 2). A plurality of peripheral precast connection structures 11 and a plurality of corner precast connection structures 15 are each fixed to the top of one of the peripheral precast columns 19, wherein the corner precast connection structure 15 is located at the top of one of the peripheral precast columns 19 in the building system 1 at a corner, and the peripheral precast connection structures 11 are each located at the top of the remaining peripheral precast columns 19 in the other building system 1. The internal building system 20 is surrounded by the external building system 10 and includes a plurality of internal beam-column joints 21, a plurality of internal steel beam structures 22, and a plurality of internal column structures 29 (Figure 2). The internal beam-column connectors 21 are each located at the top of the internal column structure 29, and the internal steel beam structure 22 is connected to either of the internal beam-column connectors 21 or between the internal beam-column connectors 21 and the outer precast connection structure 11.

As shown in Figure 2, the outer precast connection structure 11 includes an outer beam-column connector 12 (steel box joint), a first precast beam structure 13, and a second precast beam structure 14. The outer beam-column connector 12 is disposed on one of the outer precast columns 19, and the first precast beam structure 13 and the second precast beam structure 14 are connected to opposite sides of the outer beam-column connector 12. The first precast beam structure 13 of the outer precast connection structure 11 is connected to the adjacent second precast beam structure 14 of the outer precast connection structure 11.

Referring to Figures 3 and 4. Figure 3 shows a top view of the precast external connection structure 11 of the building system 1 in Figure 1, and Figure 4 shows a cross-sectional view of the precast external connection structure 11 in Figure 2 along line A-A. In one embodiment, the external beam-column joint 12 includes a steel box body 121 (hereinafter referred to as the first steel box body 121 for illustrative purposes) and a plurality of connecting steel plates 125 (two connecting steel plates 125 are shown in Figure 4). The first steel box body 121 includes a rectangular hollow structure, which may be made of a steel-containing material. The rectangular hollow structure of the first steel box body 121 includes a first beam connection surface 1211, a second beam connection surface 1212, a third beam connection surface 1213, and an outward surface 1214. The first beam connecting surface 1211 and the second beam connecting surface 1212 are opposite each other. The third beam connecting surface 1213 is opposite to the outward surface 1214 and is connected to the first beam connecting surface 1211 and the second beam connecting surface 1212, respectively. The outward surface 1214 of the first steel box body 121 is one side of the outer beam-column connector 12 facing the exterior of the building. Decorative material 71 is disposed on the outward surface 1214, and the decorative material 71 may be tile, stone or similar material. In some embodiments, as shown in FIG3, in addition to the outward surface 1214 of the outer beam-column connector 12 being covered with decorative material 71, the portions of the first beam connecting surface 1211 and the second beam connecting surface 1212 adjacent to the outward surface 1214 are also covered with decorative material 71. In some embodiments, as shown in Figure 2, the outer surface of the precast columns 19 is also provided with decorative material 72. The decorative material 72 and the decorative material 71 may be made of the same or different artificial or natural stone to beautify the appearance of the building.

In some embodiments, as shown in Figure 4 (the concrete structure 130 and reinforcing steel are omitted), the external beam-column joint 12 includes two parallel and spaced-apart connecting steel plates 125 (hereinafter referred to as first connecting steel plates 125 for illustrative purposes). Each first connecting steel plate 125 includes a rectangular body portion 126. The two body portions 126 of the two connecting steel plates 125 are fixed parallel to each other to the first steel box body 121. An opening 1250 is formed at the center of the body portion 126 to allow concrete to pass through during pouring. Furthermore, each first connecting steel plate 125 further includes a connecting end portion 127. The connecting end portion 127 extends from the periphery of the body portion 126 and protrudes from the third beam connection surface 1213 of the first steel box body 121. In some embodiments, the body 126 and connecting end 127 of the first connecting steel plate 125 are integrally formed. The first steel box body 121 may include multiple rectangular hollow structures (e.g., three rectangular hollow structures) stacked alternately with the first connecting steel plate 125. The first connecting steel plate 125 may be fixed to the aforementioned rectangular hollow structures by welding. As shown in FIG4, a plurality of web plate connecting portions 128 are disposed on the third beam connecting surface 1213 of the first steel box body 121 and connect the connecting ends 127 of two first connecting steel plates 125. The end faces of the connecting end 127 of the upper first connecting steel plate 125, the connecting end 127 of the lower first connecting steel plate 125, and the end faces of the web connecting portion 128 respectively correspond to the end faces of the upper flange 221, the lower flange 222, and the web 223 of the inner steel beam structure 22 to be connected, for use in connecting the inner steel beam structure 22.

Referring to Figure 3, the first precast beam structure 13 is connected to the first beam connection surface 1211 of the first steel box body 121, and the second precast beam structure 14 is connected to the second beam connection surface 1212 of the first steel box body 121. A plurality of reinforcing bars 62 penetrate the first beam connection surface 1211 and the second beam connection surface 1212 of the first steel box body 121, and are covered by the concrete structure 130 of the first precast beam structure 13 and the concrete structure 140 of the second precast beam structure 14. In one embodiment, the first precast beam structure 13 is a fully precast beam, while the second precast beam structure 14 is a semi-precast beam. In this disclosure, both the terms "semi-precast" and "fully precast" are used to refer to beams that are manufactured using a precast method. However, because the top side 141 of a semi-precast beam needs to be joined to the side of the precast wall 75 (Fig. 2) or the floor (not shown) in a later stage, the upper surface of a semi-precast beam and the hooks of the stirrups 143 contained therein are exposed to the outside, in order to join with the steel reinforcement and concrete of the side of the precast wall 75 or the floor. In some embodiments of this disclosure, the first precast beam structure 13 and the second precast beam structure 14 of the external beam-column connector 12 can both be fully precast beams. Alternatively, the first precast beam structure 13 and the second precast beam structure 14 of the external beam-column connection 12 can both be semi-precast beams.

Referring to Figure 5, which shows a cross-sectional view of a portion of the building system of Figure 2 along line B-B. In some embodiments, the external beam-column joint 12 further includes a plurality of connectors 1252 disposed at one end of the connecting plate 125 to connect longitudinal reinforcement located on both sides of the external beam-column joint 12 and extending in the first precast beam structure 13 and the second precast beam structure 14. Specifically, as shown in Figure 5, the plurality of connectors 1252 are fixed to the sides of the body portion 126 corresponding to the first beam connection surface 1211 and protrude from the first beam connection surface 1211. Furthermore, multiple connectors 1252 are fixed to the sides of the main body 126 corresponding to the second beam connection surface 1212 and protrude from the second beam connection surface 1212. The first precast beam structure 13 and the second precast beam structure 14 include a plurality of longitudinal steel bars 63, wherein each of the multiple longitudinal steel bars 63 is connected to one of the multiple connectors 1252 at one end adjacent to the external beam-column connector 12. The concrete structures 130 and 140 of the first precast beam structure 13 and the second precast beam structure 14 are covered with longitudinal steel bars 63 during the precasting process, and also cover steel bars 62 that penetrate the first beam connection surface 1211 and the second beam connection surface 1212 of the first steel box body 121.

In some embodiments, the external beam-column connector 12 is suspended together with the first precast beam structure 13 and the second precast beam structure 14 from the top 190 of the outer precast column 19. Vertical reinforcing bars 61 extending upward from the top 190 of the outer precast column 19 pass through through holes 1251 formed in the connecting steel plate 125 of the external beam-column connector 12. The vertical reinforcing bars 61 are designed to intersect with the reinforcing bars 62 penetrating the first beam connection surface 1211 and the second beam connection surface 1212 of the first steel box body 121, but without interfering with each other. After the external beam-column connector 12 is installed on the top of the outer precast column 19, the concrete structure 120 is poured into the first steel box body 121 to fix the external beam-column connector 12 on the top 190 of the outer precast column 19.

In some embodiments, as shown in Figure 5, the first steel box body 121 is formed by three rectangular three-dimensional hollow structures and connecting steel plates 125 interleaved, and the connecting steel plates 125 are separated from the top surface 1218 and bottom surface 1219 of the first steel box body 121 by a distance. Therefore, if the reinforcing bars 62 that penetrate the first beam connecting surface 1211 and the second beam connecting surface 1212 of the first steel box body 121 are closer to the bottom surface 132 of the first precast beam structure 13 and the bottom surface 142 of the second precast beam structure 14 than the longitudinal reinforcing bars 63 that connect to the connecting steel plate 125, it will cause the bottom of the first precast beam structure 13 and the second precast beam structure 14 to be too low, affecting the usable space in the building structure after completion. To avoid the aforementioned problems, in the embodiment shown in FIG6 of this disclosure, the longitudinal steel bars 63 connected to the connecting steel plate 125 are designed to be closer to the bottom surface 132 of the first precast beam structure 13 and the bottom surface 142 of the second precast beam structure 14 than the steel bars 62 that penetrate the first beam connecting surface 1211 and the second beam connecting surface 1212 of the first steel box body 121. Thus, in a vertical direction, the bottom surface 132 of the first precast beam structure 13 and the bottom surface 142 of the second precast beam structure 14 are at a predetermined distance H1 above the bottom surface 1219 of the first steel box body 121. The overall height of the first precast beam structure 13 and the second precast beam structure 14 can be reduced, thereby increasing the clear height under the beams on each floor of the building system and increasing the usable space within the completed building structure.

Referring again to Figure 4, the internal beam-column connection 21 includes a steel box body 212 (hereinafter referred to as the second steel box body 212 for illustrative purposes) and a plurality of connecting steel plates 213 (hereinafter referred to as the second connecting steel plates 213 for illustrative purposes). The second steel box body 212 includes a rectangular three-dimensional hollow structure, which may be made of steel-containing materials. The four sides of the rectangular three-dimensional hollow structure of the second steel box body 212 include four beam connection surfaces (Figure 4 only shows two beam connection surfaces 2122 and 2124).

In some embodiments, the internal beam-column joint 21 includes two parallel, spaced-apart second connecting steel plates 213. Each second connecting steel plate 213 includes a rectangular body portion 214. The two body portions 214 of the two second connecting steel plates 213 are fixed parallel to each other to the second steel box body 212. As shown in FIG. 4, each second connecting steel plate 213 further includes a plurality of connecting ends 215. Each connecting end 215 extends from the four peripheries of the body portion 214 and protrudes from the beam connection surfaces 2122, 2124 of the second steel box body 212. As shown in FIG. 4, an opening 2130 is formed at the center of the body portion 214 to allow concrete material to pass through. In some embodiments, the body portion 214 and the connecting ends 215 of the second connecting steel plate 213 are integrally formed. The second steel box body 212 may include multiple (e.g., three) rectangular hollow structures stacked with the second connecting steel plates 213. The second connecting steel plates 213 may be fixed to the rectangular hollow structures by welding. As shown in FIG4, a plurality of web plate connecting portions 217 (FIG4 only shows two web plate connecting portions 217) are disposed on the beam connecting surfaces 2122, 2124 of the second steel box body 212 and connected between the connecting ends 215 of the two second connecting steel plates 213. The end faces of the connecting end 215 of the upper second connecting steel plate 213, the connecting end 215 of the lower second connecting steel plate 213, and the end faces of the web connecting portion 217 respectively correspond to the end faces of the upper flange 221, the lower flange 222, and the web 223 of the inner steel beam structure 22 to be connected, for use in connecting the inner steel beam structure 22.

Referring to Figure 1, during the construction of the building system, a portion of the plurality of internal steel beam structures 22 is respectively disposed between two adjacent internal beam-column connectors 21. Another portion of the internal steel beam structures 22 is respectively disposed between one of the adjacent internal beam-column connectors 21 and one of the external beam-column connectors 12. Referring to Figure 4, one end of the internal steel beam structure 22 disposed between the internal beam-column connector 21 and the external beam-column connector 12 is connected to the connecting end 127 and the web connecting portion 128 of the first connecting steel plate 125 of the first steel box body 121, and the other end is connected to the connecting end 215 and the web connecting portion 217 of a plurality of second connecting steel plates 213 of the second steel box body 212. The first connecting steel plate 125, the second connecting steel plate 213 and the web plate connection 217 can be connected and fixed to the internal steel beam structure 22 by welding or bolting.

Figure 7 shows a top view of the outer precast connection structure 11b of the building system 1b in the second embodiment of the present invention. The difference between the building system 1b in Figure 7 and the building system 1 in Figures 1-5 is that the outer precast connection structure 11 is replaced by the outer precast connection structure 11b. In one embodiment, the outer precast connection structure 11b includes an external beam-column connector 12b, a first precast beam structure 13b, and a second precast beam structure 14b.

In one embodiment, the external beam-column joint 12b includes a concrete structure 122, a connecting steel beam 123, and two bearing panels 124a and 124b. The concrete structure 122 includes a first beam connection surface 1221, a second beam connection surface 1222, a third beam connection surface 1223, and an outward surface 1224. The first beam connection surface 1221 and the second beam connection surface 1222 are opposite each other. The third beam connection surface 1223 is opposite to the outward surface 1224 and each connects to the first beam connection surface 1221 and the second beam connection surface 1222. A plurality of through holes 1225 perpendicularly penetrate the concrete structure 122. The number and placement of the perforations 1225 are relative to the number and placement of the vertical reinforcing bars 61 fixed at one end to the top of the precast column 19 on the perimeter, so that the vertical reinforcing bars 61 (Figure 8) can be inserted. The concrete structure 122 further includes a plurality of stirrups 64 for confining the vertical reinforcing bars 61 placed in the perforations 1225, and the arrangement of the stirrups 64 is shown in Figure 7.

One end of the first precast beam structure 13b is connected to the first beam connection surface 1221 of the concrete structure 122, and one end of the second precast beam structure 14b is connected to the second beam connection surface 1222 of the concrete structure 122. A plurality of steel bars 62 penetrate the first beam connection surface 1221 and the second beam connection surface 1222 of the concrete structure 122, and are covered by the concrete structure 130b of the first precast beam structure 13b and the concrete structure 140b of the second precast beam structure 14b.

The outward surface 1224 of the concrete structure 122 is one side of the outer beam-column joint 11b facing the exterior of the building. A decorative material 71 is disposed on the outward surface 1224; the decorative material 71 may be tile, stone, or a similar material. In some embodiments, as shown in Figure 7, in addition to the outward surface 1224 of the outer beam-column joint being covered with the decorative material 71, portions of the first beam connection surface 1221 and the second beam connection surface 1222 adjacent to the outward surface 1224 are also covered with the decorative material 71.

Two bearing panels 124a and 124b are embedded in the concrete structure 122. Bearing panel 124a is adjacent to the outward surface 1224 of the concrete structure 122, and bearing panel 124b is adjacent to the third beam connection surface 1223. The two bearing panels 124a and 124b are arranged parallel to each other. The connecting steel beam 123 has an outer end 1232 fixed to the inner side of one of the bearing panels 124a, and an inner end 1231 passing through the bearing panel 124b and extending outward from the third beam connection surface 1223. The connecting steel beam 123 may have the same cross-sectional shape and size as the internal steel beam structure 22, which is connected to the external beam-column connection head 12b through the connecting steel beam 123.

Referring to Figure 8, which shows a schematic diagram of the external beam-column connector 12b of the present invention disposed on the outer precast column 19, Figure 8 only shows the connecting steel beam 123 and the bearing panels 124a and 124b of the external beam-column connector 12b; the other components of the external beam-column connector 12b are omitted from the drawing. In one embodiment, the bearing panels 124a and 124b are each composed of multiple sheet-like structures (e.g., four sheet-like structures 1241, 1242, 1243, and 1244), and are connected to the connecting steel beam 123 in an appropriate manner.

Specifically, as shown in Figure 9, the connecting steel beam 123 includes an upper flange 1233, a lower flange 1234, and a web 1235. Two sheet-like structures 1241 and 1242 of the pressure-bearing panel 124a, located adjacent to the outer end 1232 of the connecting steel beam 123, are vertically arranged on the left and right sides of the web 1235, with their upper and lower ends abutting against the upper flange 1233 and the lower flange 1234, respectively. Furthermore, the sheet-like structure 1243 of the pressure-bearing panel 124a is perpendicular to the outer side of the upper flange 1233, and the sheet-like structure 1244 is perpendicular to the outer side of the lower flange 1234. The four plate-like structures 1241, 1242, 1243, and 1244 of the bearing plate 124a are all flush with the outer end 1232 of the connecting steel beam 123. The bearing plate 124b is disposed on the connecting steel beam 123 in a similar manner to the bearing plate 124a, but the four plate-like structures 1241, 1242, 1243, and 1244 of the bearing plate 124b are separated from the inner end 1231 of the connecting steel beam 123 by a distance. Referring to Figure 7, by placing the bearing plates 124a and 124b at the junction of the connecting steel beam 123 and the outer surface of the concrete structure 122, shear strength can be provided in the concrete structure 122. On the other hand, the installation of the bearing panels 124a and 124b can also increase the restraining force on the external beam-column connection 12b.

In some embodiments, as shown in Figure 9, the connecting steel beam 123 further includes a plurality of through holes 1230 forming the upper flange 1233 and the lower flange 1234. When the vertical reinforcing bars 61 pass through the external beam-column connector 12b, a portion of the vertical reinforcing bars 61 passes through the through holes 1230 of the connecting steel beam 123, as shown in Figure 8. Through the positioning of the vertical reinforcing bars 61 and the connecting steel beam 123, the structural strength of the external beam-column connector 12b and the surrounding precast column 19 is further enhanced.

Referring to Figure 1, the corner precast connection structure 15 includes a corner beam-column connector 16, a first corner precast beam structure 17, and a second corner precast beam structure 18. The corner beam-column connector 16 connects the first corner precast beam structure 17 and the second corner precast beam structure 18 using two perpendicularly adjacent beam connection surfaces. Specifically, the corner beam-column connector 16 includes a first beam connection surface 161 and a second beam connection surface 162. The first beam connection surface 161 is perpendicular to the second beam connection surface 162, and each faces the adjacent external beam-column connector 12. The first corner precast beam structure 17 connects to the first beam connection surface 161 of the corner beam-column connector 16, and the second corner precast beam structure 18 connects to the second beam connection surface 162 of the corner beam-column connector 16.

The corner beam-column connector 16 may have a structure similar to the external beam-column connector 12 in Figure 3. However, since the corner beam-column connector 16 is not connected to the internal steel beam structure 22, its connecting steel plate does not have an outwardly protruding connecting end to connect to the internal steel beam structure 22. Alternatively, the corner beam-column connector 16 may have a structure similar to the external beam-column connector 12b in Figure 7. However, since the corner beam-column connector 16 is not connected to the internal steel beam structure 22, its corner beam-column connector 16 does not have a connecting steel beam and a bearing panel.

Figure 10 shows a schematic diagram of building system 1c in the third embodiment of the present invention, and Figure 11 shows a schematic diagram of a portion of the structure of building system 1c of Figure 10. Building system 1c includes an outer building system 10c and an inner building system 20c. The outer building system 10c is located at the outer perimeter of the building system and includes a plurality of outer precast connection structures 11c, a plurality of corner precast connection structures 15c, and a plurality of outer precast columns 19 (Figure 11). A plurality of peripheral precast connection structures 11c and a plurality of corner precast connection structures 15c are each fixed to the top of one of the peripheral precast columns 19. The corner precast connection structure 15c is located at the top of one of the peripheral precast columns 19 in the building system 1c at a corner. The peripheral precast connection structures 11c (steel box joints) are each located at the top of the remaining peripheral precast columns 19 in the other building system 1c. The internal building system 20c is surrounded by the external building system 10 and includes a plurality of internal cast-in-place beam structures 22c and a plurality of internal column structures 29c. The internal cast beam structure 22c is connected to either the internal column structure 29c or the internal column structure 29c and the external precast connection structure 11c.

As shown in Figure 11, the outer precast connection structure 11c includes an outer beam-column connector 12c, a first precast beam structure 13c, and a second precast beam structure 14c. The outer beam-column connector 12c is disposed on one of the outer precast columns 19, and the first precast beam structure 13c and the second precast beam structure 14c are connected to opposite sides of the outer beam-column connector 12c. The first precast beam structure 13c of the outer precast connection structure 11c is connected to the second precast beam structure 14c of the adjacent outer precast connection structure 11c.

Referring to Figures 12 and 13. Figure 12 shows a top view of the precast external connection structure 11c of the building system 1c of Figure 10, and Figure 13 shows a cross-sectional view of the precast external connection structure 11c of Figure 11 along line C-C. In one embodiment, the external beam-column joint 12c includes a steel box body 121c and a plurality of connecting steel plates 125c (Figure 13 shows two connecting steel plates 125c). The steel box body 121c includes a rectangular three-dimensional hollow structure, which may be made of a steel-containing material. The rectangular hollow structure of the steel box body 121c includes a first beam connection surface 1211c, a second beam connection surface 1212c, a third beam connection surface 1213c, and an outward surface 1214c. The first beam connecting surface 1211c and the second beam connecting surface 1212c are opposite each other. The third beam connecting surface 1213c is opposite to the outward surface 1214c and is connected to the first beam connecting surface 1211c and the second beam connecting surface 1212c respectively. The outward surface 1214c of the steel box body 121c is one side of the outer beam-column connector 11c facing the exterior of the building. Decorative material 71 is provided on the outward surface 1214c, and the decorative material 71 can be tiles, stone or similar objects. In some embodiments, as shown in FIG12, in addition to the outward surface 1214c of the outer beam-column connector 12c being covered by decorative material 71, the portions of the first beam connecting surface 1211c and the second beam connecting surface 1212c adjacent to the outward surface 1214c are also covered by decorative material 71. In some embodiments, as shown in Figure 11, the outer surface of the precast columns 19 is also provided with decorative material 72. The decorative material 72 and the decorative material 71 may be made of the same or different natural or artificial stone to beautify the appearance of the building.

In some embodiments, as shown in Figure 13, the external beam-column connector 12c includes two parallel, spaced-apart connecting steel plates 125c. Each connecting steel plate 125c includes a rectangular body portion 126c. The two body portions 126c of the two connecting steel plates 125c are fixed parallel to each other to the steel box body 121c. An opening 1250 is formed at the center of the body portion 126c to allow concrete to pass through during pouring. Furthermore, each connecting steel plate 125c further includes two connecting ends 127c. The connecting ends 127c extend from opposite sides of the body portion 126c and protrude from the first beam connecting surface 1211c and the second beam connecting surface 1212c of the steel box body 121c. In some embodiments, the main body 126c and the two connecting ends 127c of the connecting steel plate 125c are integrally formed. The steel box body 121c may include multiple rectangular three-dimensional hollow structures (e.g., three rectangular three-dimensional hollow structures) stacked alternately with the connecting steel plate 125c. The connecting steel plate 125c can be fixed to the aforementioned rectangular hollow structures by welding. As shown in FIG13, a plurality of web plate connecting portions 128c are disposed on the first beam connecting surface 1211c and the second beam connecting surface 1212c of the steel box body 121c, and connect the connecting ends 127c of the two connecting steel plates 125c.

Referring to Figures 12 and 13, a first precast beam structure 13c connects to the first beam connection surface 1211c of the steel box body 121c. In one embodiment, the first precast beam structure 13c includes a concrete structure 130c and a longitudinal steel beam 135. The concrete structure 130c directly abuts against the first beam connection surface 1211c of the steel box body 121c. The longitudinal steel beam 135 extends into the concrete structure 130c and is disposed adjacent to the first beam connection surface 1211c of the steel box body 121c. As shown in Figure 13 (excluding concrete 130c and steel reinforcement), the end faces of the upper flange 136, the lower flange 137, and the web 138 of the longitudinal steel beam 135 are respectively connected to the end faces of the connecting ends 127c of the upper connecting steel plate 125c, the connecting ends 127c of the lower connecting steel plate 125c, and the web connecting portion 128c, thereby being fixedly connected to the external beam-column connector 12c.

On the other hand, the second precast beam structure 14c connects to the second beam connection surface 1212c of the steel box body 121c. In one embodiment, the second precast beam structure 14c includes a concrete structure 140c and a longitudinal steel beam 145. The concrete structure 140c directly abuts against the second beam connection surface 1212c of the steel box body 121c. The longitudinal steel beam 145 extends into the concrete structure 140c and is disposed adjacent to the second beam connection surface 1212c of the steel box body 121c. As shown in Figure 13, the end faces of the upper flange 146, the lower flange 147, and the web 148 of the longitudinal steel beam 145 are respectively connected to the end faces of the connecting end 127c of the upper connecting steel plate 125c, the connecting end 127c of the lower connecting steel plate 125c, and the web connecting part 128c, thereby being fixedly connected to the external beam-column connector 12c.

Referring to Figure 14, which shows a cross-sectional view of a portion of the building system of Figure 11 along line D-D. In some embodiments, the external beam-column joint 12c further includes a plurality of connectors 1252c fixed to one side of the connecting plate 125c to connect the longitudinal reinforcement 224c of the internal cast beam structure 22c. Specifically, as shown in Figure 14, the plurality of connectors 1252c extend from the body portion 126c corresponding to the side of the internal cast beam structure 22c and protrude from the third beam connection surface 1213c. The ends of the longitudinal reinforcement 224c of the internal cast beam structure 22c adjacent to one of the external beam-column joints 12c are each connected to one of the plurality of connectors 1252c. The longitudinal reinforcement 224c of the internal cast-in-place beam structure 22c is tied to the vertical reinforcement 61 of the internal column structure 29 on one side adjacent to it, and is fixed by the cast-in-place concrete structure 225c. The internal column structure 29 can be precast or cast in-place.

Figure 15 shows a top view of the outer precast connection structure 11d of the building system 1d in the fourth embodiment of the present invention. In one embodiment, the outer precast connection structure 11d includes an outer beam-column joint 12d, a first precast beam structure 13d, and a second precast beam structure 14d.

In one embodiment, the external beam-column joint 12d (through-beam joint) includes a concrete structure 122d, a connecting steel beam 123d, and two bearing panels 124a and 124b. The concrete structure 122d includes a first beam connection surface 1221d, a second beam connection surface 1222d, a third beam connection surface 1223d, and an outward surface 1224d. The first beam connection surface 1221d and the second beam connection surface 1222d are opposite each other. The third beam connection surface 1223d is opposite to the outward surface 1224d, and each is connected to the first beam connection surface 1221d and the second beam connection surface 1222d.

The outward-facing surface 1224d of the concrete structure 122d is one side of the outer beam-column joint 11d facing the exterior of the building. Decorative material 71 is disposed on the outward-facing surface 1224d; the decorative material 71 can be tile, stone, or a similar material. In some embodiments, as shown in Figure 15, in addition to the outward-facing surface 1224d of the outer beam-column joint being covered by decorative material 71, portions of the first beam connection surface 1221d and the second beam connection surface 1222d adjacent to the outward-facing surface 1224d are also covered by decorative material 71.

Two bearing panels 124a and 124b are embedded in the concrete structure 122d. Bearing panel 124a is adjacent to the first beam connection surface 1221d of the concrete structure 122d, and bearing panel 124b is adjacent to the second beam connection surface 1222d. The two bearing panels 124a and 124b are arranged parallel to each other. A connecting steel beam 123d is disposed in the concrete structure 122d, and its two ends are respectively connected to and pass through the two bearing panels 124a and 124b. In one embodiment, the connecting steel beam 123d is disposed in the concrete structure 122d, and its two ends are respectively connected to and pass through the two bearing panels 124a and 124b. The longitudinal steel bar 224d of the internal cast beam structure 22d passes through the second beam connection surface 1222d of the concrete structure 122d near the external beam-column connection 12d, and passes through and is fixed to the web of the connecting steel beam 123d (not shown).

The first precast beam structure 13d connects to the first beam connection surface 1221d of the concrete structure 122d. The first precast beam structure 13d includes a concrete structure 130d and a longitudinal steel beam 135d. The concrete structure 130d directly abuts against the first beam connection surface 1221d of the concrete structure 122d. The longitudinal steel beam 135d extends into the concrete structure 130d and connects to one end of the connecting steel beam 123d that passes through the bearing panel 124a.

On the other hand, the second precast beam structure 14d connects to the second beam connection surface 1222d of the concrete structure 122d. The second precast beam structure 14d includes a concrete structure 140d and a longitudinal steel beam 145d. The concrete structure 140d directly abuts against the second beam connection surface 1222d of the concrete structure 122d. The longitudinal steel beam 145d extends into the concrete structure 140d and connects to one end of the connecting steel beam 123d that passes through the bearing panel 124b.

In some embodiments, the connecting steel beam 123d, the longitudinal steel beam 135d, and the longitudinal steel beam 145d are an integral steel beam structure. That is, the external beam-column joint 12d is formed by a steel beam passing through its first beam connection surface 1211d and second beam connection surface 1212d. Alternatively, the connecting steel beam 123d, the longitudinal steel beam 135d, and the longitudinal steel beam 145d are connected by an appropriate method (e.g., welding).

Figure 16 shows a cross-sectional view of two adjacent peripheral precast connection structures 11d after connection. In one embodiment, the first precast beam structure 13d and the second precast beam structure 14d of the peripheral precast connection structure 11d further include a plurality of longitudinal reinforcing bars 65. In the embodiment of Figure 16, the longitudinal reinforcing bars 65 of the first precast beam structure 13d extend from the first beam connection surface 1221d toward the end face 139d of the first precast beam structure 13d and are connected to a connector 66 disposed on the end face 139d. Furthermore, the longitudinal reinforcement 65 of the second precast beam structure 14d extends from the second beam connection surface 1222d toward the end face 149d of the second precast beam structure 14d and protrudes from the end face 149d. During assembly, the longitudinal reinforcement 65 of the second precast beam structure 14d is inserted into the connector 66 on the end face 139d of the first precast beam structure 13d to connect and fix the two peripheral precast connection structures 11d. It should be understood that although the assembly description in FIG16 uses the assembly of two peripheral precast connection structures 11d as an example, adjacent peripheral precast connection structures disclosed herein can be assembled using the same or similar structures and methods.

Referring to Figure 10, the corner precast connection structure 15c includes a corner beam-column connector 16c, a first corner precast beam structure 17c, and a second corner precast beam structure 18c. The corner beam-column connector 16c connects the first corner precast beam structure 17c and the second corner precast beam structure 18c using two perpendicularly adjacent beam connection surfaces. Specifically, the corner beam-column connector 16c includes a first beam connection surface 161c and a second beam connection surface 162c. The first beam connection surface 161c is perpendicular to the second beam connection surface 162c, and each faces the adjacent external beam-column connector 12c. The first corner precast beam structure 17c is connected to the first beam connection surface 161c of the corner beam-column connector 16, and the second corner precast beam structure 18c is connected to the second beam connection surface 162c of the corner beam-column connector 16c.

The corner beam-column connector 16c may have a structure similar to that of the external beam-column connector 12c in Figure 12. The longitudinal steel beam 175c in the first corner precast beam structure 17c is connected to the external beam-column connector 12c at the connection end on the first beam connection surface 161c, and the longitudinal steel beam 185c in the second corner precast beam structure 18c is connected to the external beam-column connector 12c at the connection end on the second beam connection surface 162c.

The embodiments described above are merely for illustrating the technical ideas and features of this invention. Their purpose is to enable those skilled in this art to understand the content of this invention and implement it accordingly. They should not be used to limit the scope of this invention. Equal changes or modifications made in accordance with the spirit revealed in this invention should still be covered within the scope of this invention.

1, 1b, 1c, 1d: Building System 10, 10a, 10c: External Building System 11, 11b, 11c, 11d: External Precast Connection Structure 12, 12b, 12c, 12d: External Beam-Column Connections 13, 13b, 13c, 13d: First Precast Beam Structure 14, 14b, 14c, 14d: Second Precast Beam Structure 15, 15c: Corner Precast Connection Structure 16, 16c: Corner Beam-Column Connections 17, 17c: First Corner Precast Beam Structure 18, 18c: Second Corner Precast Beam Structure 19: External Precast Columns 20, 20c: Internal Building System 21: Internal Beam-Column Connections 22: Internal Steel Beam Structure 22c, 22d: Internal Cast-in-Place Beam Structure 29, 29c: Internal Column Structure 61: Vertical Reinforcement 62: Reinforcement 63: Longitudinal Reinforcement 64: Stirrups 65: Longitudinal Reinforcement 66: Connectors 71: Decorative Material 72: Decorative Material 75: Precast Wall 120: Concrete Structure 121, 121c: Steel Box Body/First Steel Box Body 122, 122d: Concrete Structure 123, 123d: Connecting Steel Beams 124a, 124b: Bearing plate 125, 125c: Connecting steel plate 126, 126c: Main body 127, 127c: Connecting end 128, 128c: Web connection 130, 130b, 130c, 130d: Concrete structure 132: Bottom surface 135, 135d: Longitudinal steel beam 136: Upper flange 137: Lower flange 138: Web 139d: End face 140, 140b, 140c, 140d: Concrete structure 141: Top side 142: Bottom surface 143: Stirrups 145, 145d: Longitudinal steel beam 146: Upper flange 147: Lower flange 148: Web 149d: End face 161, 161c: First beam connection surface 162, 162c: Second beam connection surface 175c: Longitudinal steel beam 185c: Longitudinal steel beam 190: Top part 212: Steel box body 213: Connecting steel plate/Second connecting steel plate 214: Body part 215: Connection end 217: Web connection part 221: Upper flange 222: Lower flange 223: Web 224c, 224d: Longitudinal reinforcement 225c: Concrete structure 1211, 1211c, 1211d: First beam connection surface 1212, 1212c, 1212d: Second beam connection surface 1213, 1213c: Third beam connection surface 1214, 1214c: Outward surface 1218: Top surface 1219: Bottom surface 1221, 1221d: First beam connection surface 1222, 1222d: Second beam connection surface 1223, 1223d: Third beam connection surface 1224, 1224d: Outward surface 1225: Perforation 1230: Perforation 1231: Inner end 1232: Outer end 1233: Upper flange 1234: Lower flange 1235: Web 1241, 1242, 1243, 1244: Sheet structure 1250: Opening 1251: Perforation 1252, 1252c: Connector 2122: Beam connection surface 2124: Beam connection surface 2130: Opening

Figure 1 shows a schematic diagram of the building system of the first embodiment of the present invention.

Figure 2 shows a schematic diagram of part of the building system in Figure 1.

Figure 3 shows a top view of part of the building system in Figure 1.

Figure 4 shows a cross-sectional view of part of the building system in Figure 2 along the A-A section.

Figure 5 shows a cross-sectional view of part of the building system in Figure 2 along the B-B section.

Figure 6 shows a cross-sectional view of a portion of the structure of another embodiment of the building system.

Figure 7 shows a top view of a portion of the building system of the second embodiment of the present invention.

Figure 8 shows a schematic diagram of part of the structure of the building system of the second embodiment of the present invention.

Figure 9 shows an exploded view of the structure connecting the steel beam and the pressure-bearing panel of this invention.

Figure 10 shows a schematic diagram of the building system of the third embodiment of the present invention.

Figure 11 shows a schematic diagram of part of the building system in Figure 10.

Figure 12 shows a top view of part of the structure of the building system in Figure 11.

Figure 13 shows a cross-sectional view of part of the building system in Figure 11 along the C-C section.

Figure 14 shows a cross-sectional view of part of the building system of Figure 11 along the D-D section.

Figure 15 shows a top view of a portion of the structure of the building system of the fourth embodiment of the present invention.

Figure 16 shows a cross-sectional view of adjacent precast peripheral connection structures in the building system of the fourth embodiment of the present invention after connection.

1: Building Systems

10: Perimeter Building System

11: Peripheral pre-cast connection structure

12: External beam-column connection joints

13: First Precast Beam Structure

14: Second precast beam structure

15: Corner Precast Connection Structure

16: Corner Beam-Column Connection Joint

17: First corner precast beam structure

18: Second corner precast beam structure

20: Interior Building Systems

21: Internal beam-column connection joints

22: Internal steel beam structure

161: First beam connection surface

162: Second beam connection surface

Claims (11)

A building system includes: an outer building system located at the periphery of the building system and including: a plurality of outer precast columns; and a plurality of outer precast connection structures, each including: an outer beam-column connector disposed on one of the outer precast columns, the outer beam-column connector including a first beam connection surface, a second beam connection surface opposite to the first beam connection surface, and a third beam connection surface connecting the first beam connection surface and the second beam connection surface and facing inwards into the building system; a first precast beam structure connecting the first beam connection surface of the outer beam-column connector; and a second precast beam structure connecting the second beam connection surface of the outer beam-column connector; and an inner building system surrounded by the outer building system and including: A plurality of internal beam-column joints; and a plurality of internal steel beam structures, some of which are each disposed between two adjacent internal beam-column joints, and others of which are each disposed between the third beam connection surface of one of the adjacent internal beam-column joints and one of the external beam-column joints, wherein each of the external beam-column joints includes: a steel box body, wherein the first beam connection surface, the second beam connection surface, and the third beam connection surface are defined on the steel box body, and the steel box body includes an outward surface opposite to one of the third beam connection surfaces; and A plurality of connecting steel plates, each comprising a body portion fixed parallel to each other within the steel box body, and a connecting end portion extending from one side of the body portion corresponding to the third beam connecting surface of the steel box body, protruding from the third beam connecting surface of the steel box body; wherein one end of each of the internal steel beam structures of the internal building system is connected to the connecting end portion of the corresponding external beam-column connector. As described in claim 1, in the building system, one of the connecting plates of the external beam-column joints further includes a plurality of connectors therein, the connectors extending from the sides of the body corresponding to the first beam connection surface and the second beam connection surface, and protruding from the first beam connection surface and the second beam connection surface; wherein the first precast beam structure and the second precast beam structure include a plurality of longitudinal reinforcing bars therein, wherein the plurality of longitudinal reinforcing bars are connected at one end adjacent to one of the external beam-column joints to the connectors in the connecting plates of the external beam-column joints. The building system as described in claim 2, wherein, in a vertical height direction, the bottom surface of one of the first precast beam structures or the second precast beam structure is at a predetermined distance above the bottom surface of one of the steel box bodies. A building system includes: an outer building system located at the periphery of the building system and including: a plurality of outer precast columns; and a plurality of outer precast connection structures, each including: an outer beam-column connector disposed on one of the outer precast columns, the outer beam-column connector including a first beam connection surface, a second beam connection surface opposite to the first beam connection surface, and a third beam connection surface connecting the first beam connection surface and the second beam connection surface and facing inwards into the building system; a first precast beam structure connecting the first beam connection surface of the outer beam-column connector; and a second precast beam structure connecting the second beam connection surface of the outer beam-column connector; and an inner building system surrounded by the outer building system and including: A plurality of internal beam-column joints; and a plurality of internal steel beam structures, some of which are disposed between two adjacent internal beam-column joints, and others of which are disposed between the third beam connection surface of one of the adjacent internal beam-column joints and one of the external beam-column joints, wherein each of the external beam-column joints includes: a concrete structure, wherein the first beam connection surface, the second beam connection surface, and the third beam connection surface are defined on the concrete structure, and the concrete structure includes an outward surface opposite to one of the third beam connection surfaces; A first bearing panel and a second bearing panel are embedded in the concrete structure. The first bearing panel is adjacent to the outward surface of the concrete structure, and the second bearing panel is adjacent to the third beam connection surface. The two bearing panels are arranged parallel to each other. A connecting steel beam has its outer end fixed to the inner side of one of the first bearing panels, and its inner end passes through the second bearing panel and extends outward from the third beam connection surface. One end of each of the internal steel beam structures is connected to the inner end of the connecting steel beam of the external beam-column connection. The building system as described in claim 1 or 4, wherein the peripheral building system further includes a plurality of corner precast connection structures, each of the corner precast connection structures comprising: a corner beam-column connector disposed at one of the corners of the peripheral precast columns of the building system, the corner beam-column connector including a first beam connection surface and a second beam connection surface perpendicular to the first beam connection surface; a first corner precast beam structure connecting the first beam connection surface of the corner beam-column connector; and A second corner precast beam structure, connecting the second beam connection surface of the corner beam-column connector, wherein the first corner precast beam structure and the second corner precast beam structure are respectively connected to the first precast beam structure or the second precast beam structure of one of the adjacent external beam-column connectors. The building system as described in claim 1 or 4 further includes a decorative material covering the outward surface of each of the external beam-column joints and a portion of the first beam joint surface and the second beam joint surface. A building system includes: an outer building system located at the periphery of the building system and including: a plurality of outer precast columns; and a plurality of outer precast connection structures, each including: an outer beam-column connector disposed on one of the outer precast columns, the outer beam-column connector including a first beam connection surface, a second beam connection surface opposite to the first beam connection surface, and a third beam connection surface connecting the first beam connection surface and the second beam connection surface and facing inwards into the building system; a first precast beam structure connecting the first beam connection surface of the outer beam-column connector; and A second precast beam structure, connecting the second beam connection surface of the external beam-column joint, wherein the interior of both the first and second precast beam structures includes a longitudinal steel beam connected to the external beam-column joint; and an internal building system surrounded by the external building system, comprising: a plurality of internal column structures; and a plurality of internal cast-in-place beam structures, some of which are disposed between adjacent internal column structures, and others which are disposed between the third beam connection surfaces of one of the adjacent internal column structures and one of the external precast connection structures, wherein each of the external beam-column joints includes: A steel box body, wherein a first beam connecting surface, a second beam connecting surface, and a third beam connecting surface are defined on the steel box body, and the steel box body includes an outward surface opposite to the third beam connecting surface; and a plurality of connecting steel plates, each including a body portion fixed parallel to each other within the steel box body, and two connecting ends extending from two sides of the body portion opposite to the first beam connecting surface and the second beam connecting surface, and protruding from the first beam connecting surface and the second beam connecting surface of the steel box body; wherein the longitudinal steel beams in the first precast beam structure and the second precast beam structure are connected to the two connecting ends of each of the plurality of connecting steel plates at the external beam-column joints. The building system as described in claim 8, wherein one of the connecting steel plates further includes a plurality of connectors that extend from and protrude from the side of the body relative to the third beam connection surface for connection with the reinforcement of the internal cast beam structure. A building system includes: an outer building system located at the periphery of the building system and including: a plurality of outer precast columns; and a plurality of outer precast connection structures, each including: an outer beam-column connector disposed on one of the outer precast columns, the outer beam-column connector including a first beam connection surface, a second beam connection surface opposite to the first beam connection surface, and a third beam connection surface connecting the first beam connection surface and the second beam connection surface and facing inwards into the building system; a first precast beam structure connecting the first beam connection surface of the outer beam-column connector; and A second precast beam structure, connecting the second beam connection surface of the external beam-column joint, wherein the interior of both the first and second precast beam structures includes a longitudinal steel beam connected to the external beam-column joint; and an internal building system surrounded by the external building system, comprising: a plurality of internal column structures; and a plurality of internal cast-in-place beam structures, some of which are disposed between adjacent internal column structures, and others which are disposed between the third beam connection surfaces of one of the adjacent internal column structures and one of the external precast connection structures, wherein each of the external beam-column joints includes: A concrete structure, wherein a first beam connection surface, a second beam connection surface, and a third beam connection surface are defined on the concrete structure, and the concrete structure includes an outward surface opposite to one of the third beam connection surfaces; two bearing panels, respectively adjacent to and parallel to the first beam connection surface and the second beam connection surface of the concrete structure; and a connecting steel beam disposed in the concrete structure, and having its two ends respectively connected to and passing through the two bearing panels; wherein the ends of the longitudinal steel beams in the first precast beam structure and the second precast beam structure are connected to the two ends of the connecting steel beam of each of the external beam-column joints. The building system as described in claim 7 or 9 further includes a decorative material covering the outward surface of each of the external beam-column joints and a portion of the first beam joint surface and the second beam joint surface. The building system as described in claim 7 or 9, wherein the peripheral building system further includes a plurality of corner precast connection structures, each of the corner precast connection structures comprising: a corner beam-column connector disposed at one of the corners of the peripheral precast columns of the building system, the corner beam-column connector including a first beam connection surface and a second beam connection surface perpendicular to the first beam connection surface; a first corner precast beam structure connecting the first beam connection surface of the corner beam-column connector; and A second corner precast beam structure is provided, which connects to the second beam connection surface of the corner beam-column joint. The first corner precast beam structure and the second corner precast beam structure each include a steel beam connected to the corner beam-column joint. The first corner precast beam structure and the second corner precast beam structure are respectively connected to the first precast beam structure or the second precast beam structure of one of the adjacent external beam-column joints.