JPH01137035A - Multiple type radiation type beam chord stretching structure - Google Patents

Abstract

PURPOSE: To sufficiently secure a ceiling height and to improve structural safety against a local eccentric load by providing multiplex beam strings, and endlessly connecting the strut materials forming the beam strings with tension rings. CONSTITUTION: A first strut material 25 is suspended from the center section of each of arch-type or linear beams 22 arranged nearly radially, and a first beam string 27 is formed with the first strut material 25 and a first string stretched from the lower end of the first strut material 25 to a beam 22. A second strut material 29 is suspended from the beam 22 on the outer periphery of the first beam string 27, and a second beam string 31 is formed with the second strut material 29 and a second string 30 stretched from the lower end of the second strut material 29 to the outer periphery of the beam 22. The lower ends of the first strut materials 25 and the second strut materials 29 are endlessly connected by a first tension ring 28 and a second tension ring 32.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a new stringed beam structure, and more particularly to a stringed beam structure that is suitable for realizing a large span structure, and has a rational and safe construction method.

(Prior art and its problems) As one of the structural types of buildings with so-called large span structures, such as gymnasiums and pavilions, where no pillars are interposed, the 20th
There is a truss dome as shown in the figure.

The truss dome 1 has a disadvantage in that the roof surface 2 has a large rice (degree of bulge) due to its structural characteristics and generally has an intimidating design.

That is, H/L in FIG. 20 is usually 0.2 or more, and the internal estimate becomes large.

In addition, a boundary ring 4 is formed at the upper end of the lower structure 3 to support the axial force transmitted from the roof surface 2, but since the horizontal thrust force increases, the burden on the lower structure 3 increases. , the wall design will be subject to restrictions.

In order to solve this problem, a strung beam structure shown in FIG. 21 has been proposed.

This structure consists of pillars 5.
A beam 6 is constructed between the beams 6 and 5, a bundle material 7 is suspended below the center of the beam 6, and both ends of the beam 6 and the lower end of the bundle material 7 are connected by a string 8. For example, one of the joints between the string 8 and the pair of columns 5.5 is a bottle fulcrum 9, and the other is a roller fulcrum 10.

In this structure method, the tension generated in the string 8 due to the weight of the beam 6 can be borne by the beam 6 itself as an axial force,
Since it is a so-called self-anchoring type, there is no need for a boundary ring 4 like the above-mentioned Drastom, and by introducing a predetermined prestress to the string 8, the stress and deformation of the beam 6 can be controlled to obtain an optimal stress distribution. It has the advantage of being possible, and has high mechanical and construction rationality.

However, in such a conventional strung beam structure, the size of the bundle material hanging down at the center becomes quite large, making it difficult to secure a sufficient ceiling height at the center of the ceiling, which limits the range of use of the building. There are some drawbacks.

Furthermore, the slope of the beam 6 is limited, and if the roof is lightweight, there is a problem in that it is disadvantageous against updraft wind loads.

The present invention has been developed in view of these conventional problems, and an object of the present invention is to provide a building with a stringed beam structure that can eliminate the drawbacks of the conventional stringed beam structure while ensuring its features.

(Means for solving the problem) In order to achieve the above object, in the first invention of the present application, arch-shaped or straight four-linear beams arranged substantially radially,
A first stringed beam formed of a first bundle hanging from a substantially central portion of the beam and a first string stretched from the lower end of the first string to the beam, and a first stringed beam on the outer periphery of the first stringed beam. a second stringed beam formed of a second bundle suspended from the beam, a second string stretched between the lower end of the second bundled material and the outer end of the beam, and the beam; The present invention is characterized in that it includes at least a tension ring that connects the lower ends of the bundle members in an endless manner.

In addition, in order to achieve the above object, the second invention of the present application includes an arch-shaped or linear beam arranged substantially radially, a first bundle material hanging down from a substantially central part of the beam, and a first A first stringed beam formed by a first string stretched from the lower end of the bundle member to the outer end of each of the beams, a tension ring that connects the outer ends of each of the beams in an endless manner, and each column arranged at the outer end of each of the beams and the outer periphery thereof. It is characterized by comprising at least a lifting string that connects the vicinity of the upper end of the body, and a compression ring that connects the vicinity of the upper end of each column in an endless manner.

Furthermore, in order to achieve the above object, in the third invention of the present application,
Arch-shaped or straight beams arranged approximately radially,
A first stringed beam formed of a first bundle hanging from a substantially central portion of the beam, and a first string stretched from the lower end of the first bundle to the outer end of each beam, and an endless outer end of each beam. a tension ring that connects the outer end of each beam and the vicinity of the upper end of each column arranged on the outer periphery thereof, and a backstay material disposed outward from the vicinity of the upper end of each column. , at least.

(Example) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the first invention of the present application, and FIG. The figure is a conceptual sectional view thereof, FIG. 3 is a view taken in the direction of the arrow in FIG. 2, and FIG. 4 is a diagram showing the structural principle of this embodiment.

Therefore, in the building 20 according to this embodiment, the center ring 21 is disposed at the center of the roof, and the center ring 21
A plurality of arched beams 22 are arranged radially from the central ring 21 and the pillars 24 forming the outer substructure 23 .

1iii 3E A first bundle member 25 is suspended vertically downward from the end of each beam 22 on the center ring 21 side,
Further, a first string 2G is stretched from the lower end of the first bundle material 25 to an intermediate position in the span direction of the beam 22,
A first strung beam 27 is formed by the beam 22, the first bundle material 25, and the first string 26.

Note that the lower end of each of the first bundle members 25 is connected to the center ring 2.
They are connected endlessly by a first tension ring 28 having the same circular shape as 1.

Next, on the outer periphery of each of the first stringed beams 27, a second bundle material 29 is suspended downward from the joint between the moeki beam 22 and the first string 26, and the lower end of the second bundle material 29 and , a second string 30 is stretched between the outer ends of each of the beams 22,
A second stringed beam 31 is formed by the beam 22, the second bundle material 29, and the second string 30.

The lower ends of each of the second bundle members 29 (1111) are also connected endlessly by the second tension ring 32, similar to the first stringing beam 27.

Regarding the structure, materials, etc. of each of the above-mentioned members themselves, in this embodiment, the beam 22 is made of a truss material or a filling material that has a relatively high rigidity, and the first bundle material 25 and the second bundle material 29 It is preferable to use a single material having a predetermined compressive strength, such as a steel pipe, and for the first string 26 and the second string 30 to use structural wire cables or rods with high tensile strength.

- In the present embodiment having the configuration as described above, the string 26.
By applying a predetermined prestress to the beam 30 in advance, it is possible to freely control the stress and deformation of the beam 22. (PS method) In addition, by using a mixed method that combines a highly rigid beam 22 and a high tensile strength string 26.30, a rational structure type 8% that takes advantage of the characteristics of each can be used. When vertical additional loads such as
9, and the first string 2 at the joint portions 33 and 34 of the first tension ring 28 and the second tension ring 32, respectively.
6 and the tensile force T1.6 acting from the second string 30. Second, since it is absorbed by the tensile strength of the first tension ring 28 and the second tension ring 32, it is possible to maintain a self-anchoring system that maintains balance within the structural system.

Furthermore, this embodiment has a feature not found in the conventional stringed beam structure described above, in that the stringed beam is of a multiple type with the first stringed beam 27 on the center side and the second stringed beam 31 on the outer circumference side, thereby increasing the ceiling height in the central area. This makes it possible to secure the same amount of energy as possible, making it possible to apply it to multi-purpose buildings.

In addition, especially when the roof weight is light, the arched beam 22 according to this embodiment can effectively resist the upward wind load by taking advantage of its shape characteristics, and furthermore, the height of the beam 22 This has the advantage that the (gradient) can be set freely.

Furthermore, since the lower ends of each of the first bundle members 25 and each of the second bundle members 29 are connected endlessly by the first tension ring 28 and the second tension ring 32, the Even when an eccentric load is applied, such as when heavy snowfall is concentrated, the first tension ring 2
8 and the second tension ring 32, stress can be distributed and borne, and structural safety can be improved.

Also, when compared to the conventional truss dome mentioned above, it has a low rise dome shape and a sleek appearance.
As a characteristic of the strung beam structure, the horizontal thrust at the fulcrum with the column 24 is canceled, so the structure of the boundary or the lower structure 23 can be made small, allowing freedom in the design of the outer wall.

Furthermore, in terms of internal design, the flexible dome and the tension of the strings work together to create an impressive landscape.

Note that the beam 22 may be of a straight type as in another embodiment shown in FIG. The first tension ring 28 may be omitted and the first bundle material 25 may be developed from a single first bundle member 25 hanging down at the center, and in these cases as well, the same effects as in the above embodiment can be achieved.

Next, FIG. 7 is a modification of the first embodiment, showing an example of an elliptical dome-shaped building 40, and the other configurations are the same as in the first embodiment.

In the second embodiment, the length of each tooth 41 is different from the maximum length beam 41a to the minimum length beam 41b, and therefore the vertical load bearing area of each tooth 41 is also different.

Therefore, the required tension of each string will also differ, so the curvature of the tension ring 42 is adjusted accordingly, and the shape of the ring is set so that the balance condition within the structural system is maintained. shall be taken as a thing.

Therefore, if the above-mentioned balance condition is ensured, the same effects as in the first embodiment can be achieved.

Next, FIGS. 8 and 9 show a third embodiment of the first invention, and FIGS. 9(b) and 9(C) respectively show B--B in FIG. 9(a). It is a sectional view taken along the B line and the CC line.

This embodiment is an example in which the present invention is applied to a building having a so-called track-shaped plane, in which semicircular dome-shaped parts arranged at both ends are connected by an arch-shaped part in the center. For convenience, the planar shape will also be referred to as an ellipse.

In the elliptical dome 50 according to this embodiment, the structure of the dome-shaped portion 51 is the same as that of the first embodiment, but the structure of the arched portion 52 at the center is slightly different from that of the first embodiment. It is something.

That is, in this embodiment, the central ring 53, the first tension ring 54, and the second tension ring 55 are each arranged in an elliptical shape corresponding to the shape of the elliptical dome 50. In the portion 51, each tooth 2
2 is installed between the central ring 53 and the columnar body 24 on the outer periphery as in the first embodiment, but in the arched portion 52, each tooth 56 is connected to the central ring 53, but is not connected to the central ring 53. It is not divided by the central ring 53, but is constructed from one column 24 on the outer periphery to the other column 24 as shown in the figure.

Furthermore, the configurations of the first stringed beam 27 and the second stringed beam 31 are similar to those of the dome-shaped portion 51, but in the arched portion, the lower end of the first bundled material 25 and the lower end of the second bundled material 29 are further connected by a connecting string 57. In addition to being connected, the lower ends of the pair of opposing first bundle members 25 and 25 are also connected to the connecting string 5.
The feature is that it is connected and reinforced with 8.

Note that the arrangement of the beams as in this embodiment is also referred to as substantially radial in this specification.

Further, FIG. 10 is an application example of the elliptical dome shown in FIGS. 8 and 9, and in the elliptical dome 50 of this embodiment, the arched portion 52 is used as reinforcement instead of the connecting string 57. This embodiment is characterized in that a backstay 59 consisting of a horizontal member 59a and a tensile member 59b is provided on the outer periphery as shown in FIG. 10(b), and the other configurations are the same as those of the above embodiment.

In addition, in the case of a larger building, etc., the connecting string 57 and the backstay 59 may be used together.

Next, the second invention of the present application will be explained.

11 to 13 show an embodiment of the second invention, and a dome-shaped building 60 according to this embodiment has arch-shaped or straight-shaped teeth 22 arranged radially, A first strung beam is formed by a first bundle member 25 hanging from a substantially central portion of the beam 22 and a first string 26 stretched from the lower end of the first bundle member 25 to the outer end of each tooth 22. This is the same as the first invention.

In this embodiment, one end of each tooth 22 is joined to the center ring 21, and the other end (outer end) is attached to an endless second tension ring 61 arranged concentrically with the center ring 21. It is integrally connected with.

Further, a second tension ring 61 is provided at the outer end position of each beam.
and the upper end of each column 24 arranged on its outer periphery are connected by a lifting string 62, and each column 24 of 1111
The upper ends of the two are endlessly connected by a compression ring 63. Note that 64 in the figure is a structural reinforcement material for reinforcing horizontal forces.

That is, in this embodiment, the second tension ring 61 is attached to the beam 22.
It is placed on the same roof structure as the first string beam 2.
7 is supported by a lifting string 62 outside the roof structure using a so-called external lifting method.

In this embodiment, as shown in FIG. 13, a force balance system is ensured by the lifting string 62, the second tension ring 61, and the compression ring 63.
Effects similar to those of the first invention can be achieved.

Further, FIG. 14 shows an embodiment in which the second invention is applied to an elliptical dome 70, and in relation to the circular dome 60 of FIG. 11, the central ring 71. The first tension ring 72, the second tension ring 73, and the compression ring 74 each have an oval shape corresponding to the shape of the building, and in the arch-shaped part, a pair of first bundle members 25 and 25 are connected and reinforced by a connecting string 75. It is characterized by the fact that

Next, the third invention of the present application will be explained.

15 to 17 show an embodiment of the third invention, and a dome-shaped building 80 according to this embodiment has arch-shaped or straight-shaped teeth 22 arranged radially, A first stringed beam is formed by the first bundled material 25 hanging down from the approximate center of the beam 22 and the first string 26 stretched from the lower end of the first bundled material 25 to the outer end of each beam 22 marked 111. In addition, one end of each tooth 22 is joined to the center ring 21, and the other end (outer end) is integrally connected to an endless second tension ring 81 arranged concentrically with the center ring 21. Furthermore, the second tension ring 81 and the upper end of each column 24 arranged on the outer periphery of the second tension ring 81 are connected by a hanging string 82 at the outer end position of each tooth 22. is the same as the above second invention.

Therefore, in this embodiment, horizontal members 83 are arranged to protrude outward from intermediate positions of each of the pillars 24, and a first pack stay member 83 extends from the upper end of the pillars 24 to the tip of the horizontal member 83.
4 is stretched, and a second pack stay member 85 is placed between the tip of the horizontal member 83 and the anchor 86 formed on the ground.
The second tension ring 81 is disposed on the same roof surface as the beam 22 as in the second aspect of the invention, and the first tension beam 27 is suspended from the roof surface by the lifting string 82. It is characterized by being supported externally using a so-called external lifting method.

Note that 87 in the figure is a diagonal member that also serves as a structural support for reinforcing horizontal forces.

In this embodiment, as shown in FIG. 17, the lifting string 82, the second tension ring 81, and the first
A balance system of force is ensured with the second pack stay member 84 and 85, and the effect according to the first invention is achieved.

Further, FIGS. 18 and 19 show embodiments in which the second invention is applied to elliptical domes 90 and 100, respectively, and the elliptical dome shown in FIG. The basic configuration is similar to that of the shaped dome 70.

In the example shown in FIG. 18, a structural surface place member 91 is arranged on the outer periphery, and in the example shown in FIG. 19, a diagonal member 101 which also serves as a structural surface place is arranged.

Note that the present invention is not limited to the above-mentioned embodiments; for example, in addition to the double-strung beam as in each of the above-mentioned embodiments, it is also possible to use a multi-layer structure such as a triple or quadruple structure. It goes without saying that various applications are possible without departing from the gist of the present invention.

(Effects of the Invention) The present invention is constructed as described above, and by employing a multiple stringed beam system, it is possible to maintain the features of conventional stringed beams, and also to ensure a sufficient ceiling height, making it possible to extend the range of use of the building. By using arch beams in addition to improving the value, even a lightweight structure can effectively cope with updraft wind loads, and the height (slope) of the beams can be set freely. becomes.

In addition, by connecting the bundles that make up each stringed beam in an endless manner using tension rings, the structural safety of the building is greatly improved when localized eccentric loads are applied. It is something that plays.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the first invention, in which FIG. 1 is a partially cutaway conceptual perspective view of a building with a strung beam structure according to this embodiment, and FIG. Its conceptual cross-sectional view,
FIG. 3 is a view taken in the direction of the arrow in FIG. 2, and FIG. 4 is a diagram showing the structural principle of this embodiment. 5 to 7 are conceptual diagrams showing modifications of the first embodiment, FIG. 8 is a conceptual perspective view showing an example in which the first invention is applied to an elliptical dome, and FIG. 9(a) is the plan view of Figure 8,
Figure 9(b) and Figure 9(c) are B of Figure 9(a), respectively.
10(a) is a plan view showing an application example of the elliptical dome of FIG. 8, FIG. 10(b), and FIG. 10(c) are cross-sectional views along the -B and C-C lines. are respectively D in Figure 1O(a)
-D line and EE line sectional views. 11 to 13 show an embodiment of the second invention, in which FIG. 11 is a plan view of a circular dome according to this embodiment, FIG. 12 is a cross-sectional view thereof, and FIG. 13 is a diagram showing the principle of structure. , FIG. 14 is a conceptual perspective view showing another embodiment of the second invention. 15 to 17 show an embodiment of the third invention, in which FIG. 15 is a plan view of a circular dome according to this embodiment, FIG. 16 is a sectional view thereof, and FIG. 17 is a diagram showing the principle of structure. , FIG. 18(a) and FIG. 19 are plan views showing other embodiments of the third invention, and FIG. 18(b) is a sectional view of FIG. 18(a). FIG. 20 is a conceptual diagram showing a conventional truss dome, and FIG. 21 is a conceptual diagram showing a conventional stringed beam structure. 20...Building, 21...Central ring, 2
2...Beam, 23...Substructure, 24.
...Column body, 25...First bundle material, 26...
1st string, 27... 1st tensioned beam, 28... 1st tension ring, 29... 2nd bundle material, 30... 2nd string, 31... 2nd tensioned beam, 32...・Second tension ring, 40.50... Oval dome, 51... Dome shaped part, 52... Arch shaped part,
56...Beam, 57.58--Tie string, 60...Circular dome, 61...Second tension ring, 62...Hanging double string, 63...Compression ring. 64...Composition place, 70...Oval dome, 8
0...Circular dome, 81...Second tension ring, 82...Lifting string, 83...Horizontal material, 84.85...Backstay material, 86...Anchor, 87... - Diagonal material, 90.
100...Oval dome.

Claims (3)

[Claims] (1) An arch-shaped or linear beam arranged approximately radially, a first bundle member suspended from approximately the center of the beam, and a first bundle member suspended from the lower end of the first bundle member to the beam. a first stringed beam formed by one string, a second bundled material suspended from the beam around the outer periphery of the first stringed beam, and a second stringed beam stretched between the lower end of the second bundled material and the outer end of the beam. A multiple radial stringed beam structure comprising at least a second stringed beam formed of a string and the beam, and a tension ring that connects the lower ends of each of the second bundle members in an endless manner. (2) An arch-shaped or linear beam arranged approximately radially, a first bundle member hanging down from approximately the center of the beam, and a first bundle member stretched from the lower end of the first bundle member to the outer end of each of the beams. a tension ring that connects the outer ends of each of the beams in an endless manner; a lifting string that connects the outer ends of each of the beams and the vicinity of the upper end of each column arranged on the outer periphery thereof; A multiple radial stringed beam structure comprising at least a compression ring that connects the vicinity of the upper end of each column in an endless manner. (3) An arch-shaped or linear beam arranged approximately radially, a first bundle member hanging down from approximately the center of the beam, and a first bundle member stretched from the lower end of the first bundle member to the outer end of each of the beams. a tension ring that connects the outer ends of each of the beams in an endless manner; a lifting string that connects the outer ends of each of the beams and the vicinity of the upper end of each column arranged on the outer periphery thereof; A multiple radial strung beam structure comprising at least a backstay material disposed outward from near the top end of each column.