Building

Abstract

To improve earthquake resistance and wind resistance of a rigid-frame structure.SOLUTION: A building 10 comprises a dome structure 12 constituted of a dome-shaped wall 22 and constructed on a support structure 18, a rigid-frame structure 14 constructed on the support structure 18 adjacent to the dome structure 12, and a joint part 30 for joining beams 26 and 28 of the rigid-frame structure 14 to the wall 22 of the dome structure 12.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a building having a ramen structure.

Background Art

[0002] There is a building having a ramen structure composed of columns and beams (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to improve the seismic resistance and wind resistance of such a building, it is necessary to ensure sufficient horizontal bearing capacity and horizontal rigidity only with the ramen structure against the horizontal forces acting on the building due to earthquakes and winds. In order to ensure such sufficient horizontal bearing capacity and horizontal rigidity, for example, the cross-sections of the columns and beams constituting the ramen structure must be increased. Further, for example, if braces or seismic walls are provided in the ramen structure, there is a concern that these members may limit the building's floor plan or damage the appearance and interior of the building.

[0005] In consideration of the above facts, an object of the present invention is to improve the seismic resistance and wind resistance of the ramen structure.

Means for Solving the Problems

[0006] The building according to the first aspect is composed of a dome-shaped wall, a dome structure constructed on a support structure, a ramen structure constructed on the support structure adjacent to the dome structure, and a joint portion that joins the beam of the ramen structure to the wall of the dome structure.

[0007] According to the building according to the first aspect, by joining the beam of the ramen structure to the wall of the dome structure by a joint, the dome structure and the ramen structure resist the horizontal force acting on the building integrally. And, no matter from which direction the horizontal force acts from the ramen structure to the dome structure, the entire dome-shaped wall has high horizontal rigidity, so the dome structure exhibits high seismic resistance and wind resistance against the entire building. Thereby, the seismic resistance and wind resistance of the ramen structure can be improved.

[0008] Therefore, the structural cross-sections of the columns and beams constituting the ramen structure can be reduced. In addition, the number of seismic elements such as vertical braces and seismic walls arranged within the framework constituting the ramen structure can be reduced or eliminated, improving the degree of freedom in the floor plan of the building and not impairing the exterior and interior views.

[0009] Also, the columns supporting the ends of the beams of the ramen structure (the ends on the wall side of the dome structure) joined to the wall of the dome structure can be eliminated. Furthermore, since this beam has a simply supported form at both ends, the structural cross-section can be reduced compared to the cantilever beam form.

[0010] The building according to the second aspect is the building according to the first aspect, wherein the support structure is a building floor constituting one or more floors.

[0011] According to the building according to the second aspect, in a building in which a ramen structure is constructed on a building floor constituting one or more floors, the seismic resistance and wind resistance of this ramen structure can be improved.

[0012] The building according to the third aspect is the building according to the first or second aspect, wherein the ramen structure is composed of a plurality of layers.

[0013] According to the building according to the third aspect, in a building in which the ramen structure is composed of a plurality of layers, the seismic resistance and wind resistance of this ramen structure can be improved.

Effect of the Invention

[0014] Since the present invention has the above configuration, the seismic resistance and wind resistance of the ramen structure can be improved.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0016] Hereinafter, a building according to an embodiment will be described with reference to the drawings.

[0017] (Building) In the perspective view of FIG. 1, a building 10 according to the present embodiment is shown. The arrow X shown in each figure indicates the direction between the beams of the building 10 (hereinafter referred to as the "beam-interval direction X"), and the arrow Y indicates the direction of the bays of the building 10 orthogonal to the arrow X in plan view (hereinafter referred to as the "bay direction Y").

[0018] As shown in FIG. 1 and FIG. 2 which is a sectional view taken along line 2-2 of FIG. 1, the building 10 is composed of a dome structure 12 and a ramen structure 14 constructed adjacent to the dome structure 12, and is built on a foundation 18 as a support structure provided on the ground 16.

[0019] The dome structure 12 is a hemispherical steel frame structure composed of a wall 22 of a truss structure formed by connecting a plurality of truss members 20 made of H-shaped steel in a truss shape and formed in a dome shape, and is constructed on the foundation 18. That is, the dome structure 12 is constructed on the first floor of the building 10. Note that the dome structure 12 may be provided with an exterior material (for example, an exterior panel) on the wall surface.

[0020] The ramen structure 14 is a steel frame structure composed of columns 24 made of square steel pipes, beams 26 made of H-shaped steel with their ends rigidly joined to the heads of the columns 24, and beams 28 made of H-shaped steel with their ends rigidly joined to the beams 26, and is constructed on the foundation 18. Also, the heads of the columns 24 arranged at diagonal positions in plan view are connected by a horizontal brace 46 made of angle steel.

[0021] As shown in the enlarged view of FIG. 3, the beam 26 of the ramen structure 14 is joined to the wall 22 of the dome structure 12 at the joint 30 so as to be able to transmit horizontal force. At the joint 30, the end of the web 34 of the beam 26 of the ramen structure 14 is bolted to a gusset plate 32 joined to the truss member 20 constituting the wall 22 by bolts 36 and nuts 38, whereby the end of the beam 26 of the ramen structure 14 is pinned to the wall 22 of the dome structure 12. The ends of the beams 28 of the ramen structure 14 are also pinned to the wall 22 of the dome structure 12 in the same manner.

[0022] (Effect) Next, the effects of the present embodiment will be described.

[0023] According to the building 10 of the present embodiment, as shown in FIGS. 1 and 2, by joining the beams 26 and 28 of the ramen structure 14 to the wall 22 of the dome structure 12 by the joint 30, the dome structure 12 and the ramen structure 14 are integrally resistant to the horizontal forces acting on the building 10 due to earthquakes and winds. And, since the entire dome-shaped wall 22 has high horizontal rigidity regardless of the direction from which the horizontal force acts on the dome structure 12 from the ramen structure 14, the dome structure 12 exhibits high seismic resistance and wind resistance with respect to the entire building 10. Thereby, the seismic resistance and wind resistance of the ramen structure 14 can be improved.

[0024] Therefore, the structural cross-sections of the columns 24 and the beams 26 and 28 constituting the ramen structure 14 can be reduced. In addition, the number of seismic elements such as vertical braces and seismic walls arranged within the framework constituting the ramen structure 14 can be reduced or eliminated, improving the degree of freedom in the floor plan of the building 10 and preventing damage to the exterior and interior appearances.

[0025] Also, the columns that support the ends of the beams 26 and 28 of the ramen structure 14 (the ends on the wall 22 side of the dome structure 12) joined to the wall 22 of the dome structure 12 can be eliminated. Furthermore, these beams 26 and 28 have a simply supported form, and the stress generated in the beam due to the long-term load is reduced, so the structural cross-section can be reduced compared to the cantilever beam form.

[0026] Here, the results of numerical analysis of the building model 40 of the building 10 of the present embodiment and the building model 44 of the building 42 as a comparative example, which were carried out to confirm the effects of the building 10 of the present embodiment, are shown.

[0027] As shown in the perspective view of FIG. 4, the building model 40 of the building 10 of the present embodiment has the same configuration as the building 10 shown in FIG. 1. The ramen structure 14 is a steel frame structure with one layer and a 3×3 span. The length in the beam-to-beam direction X is 21,000 mm, the length in the bay direction Y is 21,000 mm, and the height is 4,300 mm.

[0028] In addition, the column 24 is a circular steel pipe with an outer diameter of 267.4 mm and a thickness of 9.3 mm, the beams 26 and 28 are H-shaped steels of 400 mm×200 mm×8 mm×13 mm, the horizontal brace 46 is an angle steel of 90 mm×90 mm×10 mm, and the truss member 20 is an H-shaped steel of 150 mm×150 mm×7 mm×10 mm.

[0029] Furthermore, the lower end of the column 24 is pinned to the foundation 18, the end of the beam 26 is rigidly joined to the head of the column 24, the end of the beam 28 is rigidly joined to the beam 26, and the ends of the beams 26 and 28 are pinned to the truss member 20 of the wall 22.

[0030] As shown in the perspective view of FIG. 5, the building model 44 of the building 42 as a comparative example is composed of a steel frame one-story 3×3 span ramen structure 48 in which the dome structure 12 is removed from the building 10 of the building model 40. The ramen structure 48 has a length in the beam-to-beam direction X of 21,000 mm, a length in the bay direction Y of 21,000 mm, and a height of 4,300 mm.

[0031] In addition, the column 24 is a circular steel pipe with an outer diameter of 267.4 mm and a thickness of 9.3 mm, the beams 26 and 28 are H-shaped steels of 400 mm×200 mm×8 mm×13 mm, the horizontal brace 46 is an angle steel of 90 mm×90 mm×10 mm.

[0032] Furthermore, the lower end of the column 24 is pinned to the foundation 18, the end of the beam 26 is rigidly joined to the head of the column 24, and the end of the beam 28 is rigidly joined to the beam 26.

[0033] By numerical analysis, in the building model 40, when a horizontal force F of 2.5 kN / m per unit area acts on the building 10, the horizontal displacement of the building 10 (ramen structure 14) is 6.7 mm and the deformation angle is 1 / 641. Also, in the building model 44, when a horizontal force F of 2.5 kN / m per unit area acts on the building 42, the horizontal displacement of the building 42 (ramen structure 48) is 170.6 mm and the deformation angle is 1 / 25. 2 In addition, the column 24 is a circular steel pipe with an outer diameter of 267.4 mm and a thickness of 9.3 mm, the beams 26 and 28 are H-shaped steels of 400 mm×200 mm×8 mm×13 mm, the horizontal brace 46 is an angle steel of 90 mm×90 mm×10 mm. 2 Furthermore, the lower end of the column 24 is pinned to the foundation 18, the end of the beam 26 is rigidly joined to the head of the column 24, and the end of the beam 28 is rigidly joined to the beam 26.

[0034] As described above, it can be understood from the numerical analysis results that the building model 40 of the building 10 in the present embodiment can reduce the horizontal displacement amount as compared with the building model 44 of the building 42 in which the dome structure 12 is not provided.

[0035] (Modification example) Next, a modification example of the above embodiment will be described.

[0036] In the above embodiment, as shown in FIGS. 1 and 2, an example in which the dome structure 12 is made of a steel frame structure is shown. However, the dome structure 12 may be other structures such as a reinforced concrete structure, a steel frame reinforced concrete structure, a CFT structure (Concrete Filled Steal Tube), etc.

[0037] For example, when the dome structure 12 is made of a reinforced concrete structure, as shown in the enlarged view of FIG. 6, the beams 26 and 28 of the ramen structure 14 are joined to the wall 22 of the dome structure 12 by the joint portion 50 so as to be able to transmit a horizontal force.

[0038] At the joint portion 50, the end of the web 34 of the beam 26 of the ramen structure 14 is bolted to the gusset plate 32 fixed to the wall member 52 of the reinforced concrete structure that constitutes the wall 22 by bolts 36 and nuts 38, so that the end of the beam 26 of the ramen structure 14 is pinned to the wall 22 of the dome structure 12.

[0039] The gusset plate 32 is fixed to the wall member 52 by providing nuts 58 at both ends of a bolt 56 provided so as to penetrate a base plate 54 provided at the end of the gusset plate 32, the wall member 52, and a fixing plate 60 arranged so as to sandwich the base plate 54 and the wall member 52 and tightening them. The end of the beam 28 of the ramen structure 14 is also pinned to the wall 22 of the dome structure 12 in the same manner. Note that the gusset plate 32 may be fixed to the wall member 52 by embedding a stud bolt attached to the lower surface (the surface on the wall member 52 side) of the base plate 54 in the wall member 52.

[0040] In addition, in the above embodiment, as shown in FIGS. 1 and 2, an example in which the brace structure 14 is made of a steel frame structure has been shown. However, the brace structure 14 may be other structures such as a reinforced concrete structure, a steel frame reinforced concrete structure, a CFT structure (Concrete Filled Steal Tube), etc. The brace structure 14 being made of a steel frame structure results in lower horizontal rigidity, making the application to the building 10 of this embodiment more effective.

[0041] Furthermore, in the above embodiment, as shown in FIGS. 1 and 2, an example in which the brace structure 14 is a single-layer structure has been shown. However, the brace structure 14 may be a structure composed of multiple layers. By doing so, in a building where the brace structure is composed of multiple layers, the seismic resistance and wind resistance of this brace structure can be improved.

[0042] For example, as shown in the elevation views of FIGS. 7(A) and (B), the brace structure 14 may be a two-layer structure.

[0043] Also, in the above embodiment, as shown in FIGS. 1 and 2, an example in which the support structure on which the dome structure 12 is constructed is the foundation 18 has been shown. However, the support structure may be a building floor constituting one or more floors. That is, the dome structure 12 and the brace structure 14 may be constructed on an intermediate floor or the top floor of the building. By doing so, in a building where the brace structure is constructed on a building floor constituting one or more floors, the seismic resistance and wind resistance of this brace structure can be improved.

[0044] For example, as shown in the elevation view of FIG. 7(C), the dome structure 12 and the brace structure 14 may be constructed on the fourth floor of the building 10.

[0045] As described above, one embodiment of the present invention has been explained. However, the present invention is not limited to such embodiments, and one embodiment and various modifications may be appropriately combined and used, and it goes without saying that the present invention can be implemented in various forms without departing from the gist of the present invention.

Explanation of Reference Numerals

[0046] 10 Building 12 Dome structure 14 Ramen structure 18 Foundation (support structure) 22 Wall 26, 28 Beam 30, 50 Joint

Claims

1. A dome structure composed of a circular lid-shaped wall and constructed on a support structure, A ramen structure adjacent to the dome structure and constructed on the support structure, A joint that joins the beam of the ramen structure to the wall of the dome structure, and having The building in which the joint is provided in a truss member that constitutes the wall and also constitutes a truss that is continuous vertically, horizontally, and in all directions.

2. A dome structure composed of a circular lid-shaped wall and constructed on a support structure, A ramen structure adjacent to the dome structure and constructed on the support structure, A joint that joins the beam of the ramen structure to the wall of the dome structure, and having The support structure is a building floor that constitutes one or more floors.

3. A dome structure composed of a circular lid-shaped wall and constructed on a support structure, A ramen structure adjacent to the dome structure and constructed on the support structure, A joint that joins the beam of the ramen structure to the wall of the dome structure, and having The ramen structure is a building composed of multiple layers.

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