TWI808029B - Modular energy dissipation mechanism - Google Patents

Abstract

The invention relates to a modularized energy dissipation mechanism, which is installed between corresponding components of a building structure, including energy dissipation components, connecting sections, and joints. Through a unique force transmission mechanism, the axial pulling and compressing external forces on the energy dissipation mechanism are converted into the internal bending moment stress of the core plate, and through the optimization of the energy dissipation section, the energy dissipation area reaches the full-section bending and shear yield, and the pursuit of toughness is maximized.

Description

Modular energy dissipation mechanism

The present invention relates to a modularized energy-dissipating mechanism, in particular to a modularized energy-dissipating mechanism capable of absorbing external forces on structures. The main principle is to convert the absorbed relative displacement of building floors into in-plane deformation of metal energy-dissipating panels through mechanism design and properties of metal materials, and utilize the toughness of metal materials to achieve energy-dissipating and shock-absorbing purposes.

Earthquakes are frequent in Taiwan, and various shock-absorbing equipment have been widely used in the seismic design or evaluation and reinforcement of structures. Displacement-type energy-dissipating braces are one of the important shock-absorbing equipment.

Displacement-type energy-dissipating braces can provide additional stiffness-to-damping ratios for the structure. They are often used in situations where the structural stiffness is insufficient or there are weak floors. When the structure is subjected to an earthquake, the structural deformation can be converted into the energy-dissipating section of the braces, so that it can generate strain energy and then absorb the energy generated by the earthquake to achieve shock absorption. This technology has been widely used in structural reinforcement and new structures.

The known flexure beam bracing used in the seismic design or reinforcement of structures uses the toughness of metal tension and compression to dissipate energy. The brace is subjected to axial tension and pressure, and the energy dissipation member enters into the buckle to achieve energy dissipation.

However, if the core member of the braced bracing is not enclosed, it is easy to buckle when it is under compression. Therefore, the exterior must be surrounded by steel pipes and filled with concrete. This method increases the weight of the braces and causes asymmetric tension and compression forces of the braces.

Therefore, the inventor of this case came up with the present invention after observing the above issues.

The invention provides a modularized energy dissipation mechanism, which is installed in a building structure, and the joint end is joined to the corner of the structure. When the building generates interlayer displacement, the external force is transmitted from the joint end to the energy dissipation plate through the force transmission mechanism designed by the mechanism, so that it is subdued and the energy of the external force is converted into strain energy to absorb, and the toughness of the metal material is used to achieve the purpose of energy dissipation.

The present invention includes two independent modules of the energy dissipation component and the connecting section. Each module can be manufactured separately according to the required tonnage, joint method, length and other conditions, and is coupled to each other by welding.

The energy dissipation component includes an energy dissipation plate and a force transmission plate, wherein the force transmission plate is located on both sides of the energy dissipation plate, and the energy dissipation plate and the force transmission plate are stacked parallel to each other.

Preferably, the energy dissipation plate is integrally formed by metal cutting, and further includes a force transmission end, a fixed end, and an energy dissipation area. When an external force causes a relative displacement difference between the force transmission end and the fixed end of the core plate, the energy dissipation area is designed to generate full-section bending moment stress and shear stress yield, thereby exerting better plasticity.

Preferably, the force transmission ends of the force transmission plate and the energy dissipation plate are connected to each other, serving as a force transmission path, transmitting the force to the core plate, and fixing the force transmission plate and the energy dissipation plate.

Preferably, at least two groups of energy dissipation components are arranged at one end of the connection section, and both groups of energy dissipation components are parallel to the connection section. The fixed end of the energy dissipation plate of one side of the energy dissipation component is fixed on the upper flange of the connection section, and the fixed end of the energy dissipation plate of the energy dissipation component on the other side is fixed on the lower flange of the connection section. This force transmission mechanism cleverly balances the bending moment, so that there is no bending moment in the connecting section to avoid buckling.

Preferably, the other end of the connecting section is also provided with the same number of energy-dissipating components symmetrically to the mid-plane of the connecting section, so that both ends of the modularized energy-dissipating mechanism can dissipate energy.

Preferably, the core plate is made of low-strength high-toughness steel material, which can increase the toughness capacity of the modularized energy dissipation mechanism.

Preferably, the outer side of the connection section is surrounded by a sealing plate to enclose the energy dissipation component, so as to provide the binding strength of the core plate during the energy dissipation process and avoid local buckling of the core plate.

Preferably, the force transmission plates of the two energy dissipation components at one end of the connecting section can be used for jointing with the building. Alternatively, a joint plate may be provided as a joint end between the two force transmission plates, and the energy dissipation plate is located between the two force transmission plates for jointing with the corner joints of the building. Alternatively, a cross joint end may be provided between the two force transmission plates at one end of the connecting section to join with the corner joint of the building.

Preferably, when the modularized energy dissipation mechanism is subjected to external tension and compression force, it transmits the force to the core plate through paths such as the joint end and the force transmission plate, thereby absorbing energy by the energy dissipation area of the core plate.

In order to enable those skilled in the art to understand the purpose, features and effects of the present invention, the present invention will be described in detail below by means of the following specific embodiments and accompanying drawings.

The inventive concept will now be explained more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the inventive concept are shown. Advantages and features of the inventive concept and methods for achieving it will be apparent below by referring to the exemplary embodiments described in more detail with reference to the accompanying drawings.

The terminology used herein is for describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the terms "a", "an" and "the" in the singular are intended to include the plural forms as well, unless the context clearly dictates otherwise. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present.

Exemplary embodiments are described herein with reference to the accompanying drawings, which are idealized exemplary illustrations. Accordingly, deviations from the illustrated shapes as a result, for example, of manufacturing techniques and/or tolerances are to be expected. Thus, the regions shown in the figures are schematic and their shapes are not intended to illustrate the actual shape of a region of a mechanism and are not intended to limit the scope of the example embodiments.

The modularized energy-dissipating mechanism of the present invention is composed of energy-dissipating components arranged at both ends of the connecting section, and the force-transmitting plate of the energy-dissipating component can be used as a joint end to connect with the structure through the force-transmitting plate. Various modules can be manufactured separately according to the required tonnage, joint method and length, and are coupled to each other by welding.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an energy dissipation assembly 100 according to the present invention, including an energy dissipation plate 110 and a force transmission plate 120, wherein the force transmission plate 120 is located on both sides of the energy dissipation plate 110, and the energy dissipation plate 110 and the force transmission plate 120 are stacked parallel to each other.

Specifically, please refer to FIG. 1 and FIG. 2 together. FIG. 2 is a schematic diagram of an energy dissipation plate of a modular energy dissipation mechanism according to the present invention. As shown in Figure 2, the energy dissipation plate 110 is manufactured through metal cutting and integrally formed, and further includes a force transmission end 111, an energy dissipation area 112, and a fixed end 113. When an external force is applied, a displacement difference occurs between the force transmission end 111 and the fixed end 113. The shape design of the energy dissipation area 112 makes the bending moment stress and shear stress of the entire section subside, and exerts better toughness capacity.

Specifically, the force transmission plate 120 and the force transmission end 111 of the energy dissipation plate 110 are connected to each other, so as to fix the force transmission plate 120 and the energy dissipation plate 110 .

As shown in FIG. 3 , in the embodiment of FIG. 3 , a connection section 200 and four energy dissipation components 100 are included. One end of the connection section 200 has two energy dissipation components 100, and each of the two energy dissipation components 100 has a force transmission plate 120, which can be used to engage with the building.

As shown in FIG. 4 , in the embodiment of FIG. 4 , two energy dissipation assemblies 100 are arranged at one end of the connection section 200 . As can be seen from the perspective of FIG. 4 , the fixed positions of the two energy dissipation assemblies 100 and the connection section 200 are different.

As shown in FIG. 5 , in another embodiment, the energy dissipation component 100 can be further provided with a short force transmission plate 121, which is arranged on both sides of the energy dissipation plate 110 with another force transmission plate 120. The short force transmission plate 121, the force transmission plate 120 and the force transmission end 111 of the energy dissipation plate 110 are connected to each other. There is also a piece of material 122 between the short force transmission plate 121 and the force transmission plate 120, so that the external force on the force transmission plate 120 is distributed to the short force transmission plate 12. 1. Both the force transmission plate 120 and the short force transmission plate 121 can transmit force to the force transmission end 111 of the energy dissipation plate 110, so that the force on the energy dissipation plate 110 is symmetrical.

Specifically, a sealing plate 210 may be provided outside the energy dissipation assembly, so that the energy dissipation assembly 100 is surrounded by the sealing plate 210 .

Please refer to FIG. 6 . FIG. 6 is a schematic diagram of an application example of a modularized energy dissipation mechanism according to the present invention. It includes a connection section 200 , four energy dissipation components 100 and two sealing plates 210 .

Specifically, the energy dissipating component 100 of the present invention can design and install the corresponding joint end structure according to the actual needs of the site. In the application example shown in FIG. 6 , two force transmission plates 120 are used for jointing, and two sets of energy dissipation components 100 are arranged at one end of the connection section 200, that is, there will be two force transmission plates 120 to form a structure that can be jointed. The two force transmission plates 120 can be clamped into the joints of building corners. Waiting for connection.

As shown in FIG. 7 , compared to FIG. 5 , in another embodiment, a short force transmission plate 121 of equal length is disposed on both sides of the energy dissipation plate 110 .

Furthermore, a joint plate 300 may be provided between the two short force transmission plates 121 in the energy dissipation assembly 100 , as shown in FIG. 8 .

Specifically, both the joint plate 300 and the energy dissipation plate 110 are located between the two short force transmission plates 121, but they are not in contact with each other, and part of the joint plate 300 is exposed on the short force transmission plate 121. In addition, after the joint plate 300 receives an external force, the force can be evenly distributed to the two short force transmission plates 121, so that the two short force transmission plates 121 transmit symmetrical forces.

Specifically, the energy dissipating assembly 100 of the present invention can be designed and installed with a corresponding joint end structure according to the actual needs on the spot. In this application example, a joint plate 300 is provided between two force transmission plates 120, and two sets of energy dissipation components 100 are arranged at one end of the connecting section 200, that is, there will be two joint plates 300 to form a structure that can be jointed. The two joint plates 300 can be clamped into the joints of building corners. Engagement methods such as locks.

Please refer to FIG. 9 , which is a schematic diagram of another application example of the modularized energy dissipation mechanism according to the present invention. It includes a connection section 200, four energy dissipation components 100, two sealing plates 210 and two cross joint ends 400. The cross joint end 400 is composed of a forward joint plate 410 and two lateral joint plates 420. The forward joint plate 410 is arranged in parallel between the energy dissipation components 100 on both sides, and is welded and coupled with a force transmission plate 120 of the two energy dissipation components 100. The other side joint plate 420 is welded on both sides of the forward joint plate 410, respectively. A cross joint 400 is formed.

Specifically, the energy dissipating assembly 100 of the present invention can be designed and installed according to different actual structures on site. In the application example shown in FIG. It is perpendicular to the other two lateral joint plates 420 . The joint method with the corner joint of the building is also not limited to welding joints or various bolt locks.

Specifically, the number of energy dissipation components 100 provided at both ends of the connection section 200 is not limited.

Specifically, the connecting section 200 may be a composite section of H-shaped steel, C-shaped steel, square steel pipe or steel plate.

The technical characteristics of the present invention and the technical effects that can be achieved are described as follows:

The same number of energy dissipation components 100 is symmetrically arranged on both ends of the connection section 200 with respect to the middle plane of the connection section. An energy dissipation component 100 is arranged on both sides of one end of the connection section 200, and the two sides are arranged in an antisymmetric manner. It is the key to maintain the balance of bending moment and avoid buckling damage.

In addition, from Figures 6 and 9, it can be further seen that there are sealing plates 210 on both sides of the connecting section 200. The function of the sealing plates is to enclose the energy dissipation components 100 arranged on the connecting section 200 and maintain the energy dissipation behavior of the in-plane deformation of the core plate; another function of the sealing plates is to increase the cross-sectional strength of the connecting section 200 and prevent local buckling of the connecting section 200.

Furthermore, the energy dissipation principle of the present invention is that the characteristics of the metal cutting shape of the energy dissipation plate 110 convert the absorbed relative displacement of the building floor into the in-plane yield deformation of the energy dissipation plate 110, and utilize the toughness of the metal material to achieve the purpose of energy dissipation and shock absorption.

Please continue to refer to FIG. 10 and FIG. 11 , which are performance test data diagrams of the modularized energy dissipation mechanism according to the present invention.

Specifically, the performance test is carried out in accordance with the guidelines of Chapter K3 of ANSI/AISC 341-10 (Seismic Provisions for Structural Steel Building). The repeated load test includes two stages. The first stage is the standard loading process, and the second stage is the fatigue loading process. Both stages use displacement-controlled tension and compression repeated loading methods.

The design yield displacement (Δy) of this test experiment is 6 mm, and the diagonal bracing deformation (Δm) corresponding to the floor design displacement angle is 30 mm. The displacements of the standard loading process in the first stage are 1.0Δy, 0.5Δm, 1.0Δm, 1.5Δm, and 2.0Δm, respectively, and the repeated tension and compression loads are performed twice.

The displacement of the fatigue loading process in the second stage is 1.5Δm, and the fatigue loading test is executed to 40 cycles or when the specimen is destroyed.

Figure 10 and Figure 11 further show the hysteresis loops of the standard loading process and the hysteresis loops of the fatigue loading process respectively. It can be seen from the figure that if the bilinear nonlinear behavior is used to describe the actual yield displacement of this test is 4.0 mm; the fatigue loading has a total of 40 cycles. After the standard loading history and fatigue loading history tests, the non-elastic cumulative deformation is 1908 times the actual yield displacement of the test, which is much better than the 200 times yield displacement required by the specification.

Specifically, the difference between the tension and pressure of the same cycle in the standard loading process is no more than 4.4%, and there is no strength decline, which can provide symmetrical, full and stable energy dissipation behavior.

Specifically, the maximum output during the fatigue loading process was 992.87 kN, and the maximum output was 884.06 kN in the 40th lap, with a total decrease of 10.96% in the maximum output, which still did not reach the 15% strength drop of the commonly used failure judgment standard in academic research. After the two-stage test of the standard and fatigue loading process, none of the specimens suffered fracture damage, the maximum bearing capacity decreased significantly, or the energy absorption decreased significantly, and the durability was good.

Finally, the technical characteristics of the present invention and the technical effects that can be achieved are summarized as follows:

First, with the modularized energy dissipation mechanism of the present invention, the shape of the core plate is designed based on the in-plane bending moment drop as the energy dissipation behavior. The behavior of the core plate under repeated force is symmetrical and can provide stable energy dissipation behavior. Energy dissipation components are arranged at both ends of the connecting section, which are symmetrically configured and can dissipate energy at both ends.

Second, the energy dissipation components of the present invention are arranged on both sides of the connecting section in an antisymmetric manner. When the modularized energy dissipation mechanism is subjected to tension and pressure, the bending moments at both ends of the connecting section are in balance, preventing buckling deformation.

Thirdly, by means of the modular energy dissipation mechanism of the present invention, the energy dissipation components are modularly designed, joint types are designed in accordance with on-site construction requirements, toughness is improved, and manufacturing and assembly procedures are optimized.

Fourth, with the modularized energy-dissipating mechanism of the present invention, the modularized design helps to establish a standardized product process, increases the quality stability of product mass production, reduces the pressure on material inventory, makes the product quality stable and can reduce manufacturing costs.

The above is to illustrate the implementation of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention; all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention shall be included in the scope of the following patents.

100: energy dissipation components 110: energy dissipation board 111: Power transmission end 112: energy dissipation area 113: fixed end 120: force transmission plate 121: Short power transmission plate 200: connection segment 210: sealing plate 300: joint plate 400: cross joint end 410: Positive joint plate 420: Lateral joint plate

Fig. 1 is a schematic diagram of energy dissipation components of a modular energy dissipation mechanism according to the present invention; Fig. 2 is a schematic diagram of an energy dissipation plate of a modular energy dissipation mechanism according to the present invention: Fig. 3 is a schematic diagram of a modularized energy dissipation mechanism according to the present invention; Fig. 4 is a schematic cross-sectional view of a modularized energy dissipation mechanism according to the present invention; Fig. 5 is a schematic diagram of a double force transmission plate energy dissipation component of a modular energy dissipation mechanism according to the present invention; Fig. 6 is a schematic diagram of an application example of a modularized energy dissipation mechanism according to the present invention; Fig. 7 is a schematic diagram of another application example of the double force transmission plate energy dissipation component of the modularized energy dissipation mechanism according to the present invention; Fig. 8 is a schematic diagram of an application example of a double force transmission plate energy dissipation component containing joint plates according to the modularized energy dissipation mechanism of the present invention; Fig. 9 is a schematic diagram of another application example of the modularized energy dissipation mechanism according to the present invention; Fig. 10 is a hysteresis loop diagram of the standard loading history of the modularized energy dissipation mechanism according to the present invention; and Fig. 11 is a hysteresis loop diagram of the fatigue loading history of the modularized energy dissipation mechanism according to the present invention.

110: energy dissipation board

120: force transmission plate

200: connection segment

Claims (6)

A modular energy dissipation mechanism installed on a building structure, comprising: An energy dissipation component, comprising at least one energy dissipation plate and at least one force transmission plate, the energy dissipation plate and the force transmission plate are parallel to each other; a connection section, at least two of the energy dissipation components are arranged at one end of the connection section; and Wherein, one end of the force transmission plate is used as a joint end, which is connected with the components of the building. The energy dissipation plate includes an energy dissipation area, a force transmission end and a fixed end. The other end of the force transmission plate is connected to the force transmission end of the energy dissipation plate. The force transmission end and the fixed end produce a relative displacement after being acted by an external force. The energy dissipation component is designed on both sides of the connection section in an antisymmetric configuration. The modularized energy dissipation mechanism as described in Claim 1, wherein the energy dissipation component further includes a short force transmission plate, which is arranged on both sides of the energy dissipation plate together with the force transmission plate, the force transmission plate, the short force transmission plate and the force transmission end of the energy dissipation plate are connected to each other, and the force transmission plate and the short force transmission plate are connected to each other by blocks. The modularized energy dissipation mechanism as described in Claim 1, wherein the force transmission plates of equal length are arranged on both sides of the energy dissipation plate, and the energy dissipation component is further provided with a joint plate, the joint plate is located between the force transmission plates, and part of the joint plate is exposed on the force transmission plate, and the joint plate is jointed with the corner joints of the building. The modularized energy dissipation mechanism as described in claim 1, wherein the joint end is a cross joint end, and the cross joint end is composed of a forward joint plate and two lateral joint plates, wherein the two sides of the forward joint plate are respectively welded to the lateral joint plate. The modularized energy-dissipating mechanism according to claim 1, wherein both sides of the connecting section are provided with sealing plates to cover the energy-dissipating component disposed on the connecting section. The modularized energy dissipation mechanism as described in Claim 1, wherein the connecting section is a composite section of H-shaped steel, C-shaped steel, square steel pipe or steel plate.