Building structure

Abstract

To provide a building structure capable of transferring horizontal force between a main frame structure and an outer shell structure without arranging slabs or braces between the main frame structure and the outer shell structure.SOLUTION: A building structure is provided with: a main frame structure 20 of a building 10; an outer shell structure 30 placed apart from the main frame structure 20 and forming a part of the outer peripheral surface of the building 10; and connection beams 40 connecting the main frame structure 20 and the outer shell structure 30, wherein a connection beam 40A disposed at an uppermost part is rigidly connected to an outside upper end beam 32A disposed at an upper end part of the outer shell structure 30 and to an inside upper end beam 22A disposed opposite to the outside upper end beam 32A in the main frame structure 20, with its strong axial direction along a horizontal plane.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to building structures. [Background technology]

[0002] Patent Document 1 listed below shows a configuration in which an outer peripheral tube frame and an inner peripheral tube frame are connected by a connecting beam. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-169741 Summary of the Invention [Problem to be solved by the invention]

[0004] In a building equipped with an inner main frame and an outer shell frame as shown in Patent Document 1, for example, during an earthquake, it is necessary to transmit horizontal forces between the main frame and the shell frame. For this reason, slabs or braces are sometimes placed between the two frames to increase rigidity. However, for example, at the top of a building, it may not be desirable to place slabs or braces in order to increase openness or allow in light. For this reason, it is necessary to transmit horizontal forces between the main frame and the shell frame without using slabs or braces.

[0005] In consideration of the above facts, the present invention aims to provide a building structure that can transmit horizontal forces between the main frame and the outer shell frame without placing slabs or braces between the main frame and the outer shell frame. [Means for solving the problem]

[0006] The building structure of claim 1 comprises a main frame of a building, an outer shell frame arranged at a distance from the main frame and forming at least a portion of the outer peripheral surface of the building, and a connecting beam connecting the main frame and the outer shell frame, wherein the connecting beam arranged at the top is rigidly connected to an outer upper end beam arranged at the upper end of the outer shell frame and an inner upper end beam facing the outer upper end beam in the main frame, and the strong axis direction is along the horizontal plane.

[0007] In the building structure of claim 1, tie beams are installed between the main frame and the outer shell frame of the building. The strong axis of the tie beam located at the top of the building is aligned with the horizontal plane, providing higher horizontal rigidity between the main frame and the outer shell frame compared to when it is not aligned with the horizontal plane. This allows horizontal forces to be transmitted between the main frame and the outer shell frame without the need for slabs or braces between them. This allows for the placement of voids and skylights instead of slabs or braces to enhance the openness of the building's perimeter.

[0008] The building structure of claim 2 is the building structure of claim 1, wherein the strong axis directions of both the outer upper end beam and the inner upper end beam are along the horizontal plane, and a lattice frame is formed by the connecting beam, the outer upper end beam, and the inner upper end beam located at the top.

[0009] According to the building structure of claim 2, the horizontal rigidity between the main frame and the shell frame can be increased compared to when the strong axis directions of the outer upper beam and the inner upper beam are not along the horizontal plane.

[0010] The building structure of claim 3 is the building structure of claim 1 or 2, in which an upwardly protruding raised member is arranged at the upper end of the main frame facing the outer shell frame, the inner upper beam is rigidly connected to the upper end of the raised member, and an open-air space is formed below the connecting beam arranged at the top.

[0011] According to the building structure of claim 3, an atrium can be formed in the space below the connecting beam. [Effects of the Invention]

[0012] According to the present invention, horizontal forces can be transmitted between the main frame and the shell frame without the need to place slabs or braces between them. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a plan view showing a part of a building to which a building structure according to an embodiment of the present invention is applied. [Figure 2] (A) is a plan view showing an example of a building structure according to an embodiment of the present invention, in which an outer shell frame is arranged over the entire area of ​​one of the building's outer peripheral surfaces; (B) is a plan view showing an example of a building structure in which an outer shell frame is arranged over the entire area of ​​two perpendicularly intersecting outer peripheral surfaces of the building; (C) is a plan view showing an example of a building structure in which an outer shell frame is arranged over the entire area of ​​two opposing outer peripheral surfaces of the building; (D) is a plan view showing an example of a building structure in which an outer shell frame is arranged over the entire area of ​​the building's outer peripheral surfaces; and (E) is a plan view showing an example of a building structure in which an outer shell frame is arranged over a portion of one of the building's outer peripheral surfaces. [Figure 3] 1A is a partially enlarged plan view showing a connecting beam in a building structure according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A. [Figure 4] FIG. 10 is a cross-sectional view showing an example of a building structure according to an embodiment of the present invention in which a skylight is arranged instead of a void. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a building structure according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiple numbers.

[0015] Furthermore, descriptions of overlapping configurations and symbols in the drawings may be omitted. Note that the present disclosure is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting configurations, replacing them with different configurations, or combining one embodiment with various modified examples, within the scope of the purpose of the present disclosure.

[0016] In each drawing, the directions indicated by arrows X and Y are directions along the horizontal plane and are perpendicular to each other. The direction indicated by arrow Z is a direction along the vertical direction (up and down). In each drawing, the directions indicated by arrows X, Y, and Z are assumed to be consistent with each other.

[0017] <Building> 1 shows the uppermost frame of a building 10 to which a building structure according to an embodiment of the present invention is applied. The building 10 includes a main frame 20, an outer shell frame 30, and tie beams 40.

[0018] (Main frame, outer shell frame) The main frame 20 is a steel-framed, beam-column structure comprising beams 22 extending in one direction (X direction) and in a direction perpendicular to the one direction (Y direction), and columns 24 across which the beams 22 are spanned.

[0019] The outer shell frame 30 is a column-and-beam frame that is positioned apart from the main frame 20 and forms at least a portion of the outer periphery of the building 10. The outer shell frame 30 is a steel-framed column-and-beam structure that includes beams 32 that run in one direction and columns 34 across which the beams 32 are spanned.

[0020] The above-mentioned "at least a part of the outer peripheral surface of the building 10" includes the entire area of ​​one side of the outer peripheral surface of the building 10, as shown in Fig. 2(A), and also includes the entire areas of two sides of the outer peripheral surface of the building 10 that are perpendicular to each other, as shown in Fig. 2(B).

[0021] Furthermore, "at least a portion of the outer peripheral surface of the building 10" includes the entire area of ​​two opposing sides of the outer peripheral surface of the building 10, as shown in Figure 2(C). Furthermore, it includes the entire area of ​​the outer peripheral surface of the building 10, as shown in Figure 2(D). Furthermore, it includes a portion of one side of the outer peripheral surface of the building 10, as shown in Figure 2(E). In this way, the arrangement of the outer shell frame 30 is not particularly limited.

[0022] (Connecting beam) As shown in Fig. 1, the connecting beams 40 are beams that connect the shell frame 30 and the main frame 20. Of the connecting beams 40, the one arranged at the top is referred to as connecting beam 40A.

[0023] One connecting beam 40A is provided for every multiple beam spans in the main frame 20. Specifically, one connecting beam 40 is provided for every two spans of the main frame 20. Note that one connecting beam 40 may be provided for every span of the main frame 20.

[0024] As shown in FIG. 3, the connecting beam 40A is rigidly joined to an outer upper beam 32A arranged at the upper end of the outer shell frame 30 and an inner upper beam 22A of the main frame 20 facing the outer shell frame 30.

[0025] The connecting beam 40A is rigidly joined to the outer upper beam 32A via the column 34. In other words, the connecting beam 40A is rigidly joined to the column 34, and the outer upper beam 32A is also rigidly joined to the column 34. In the present invention, such an embodiment in which beams are rigidly joined to each other via a column is referred to as beams being rigidly joined to each other.

[0026] Similarly, the connecting beam 40A is rigidly joined to the inner upper beam 22A via the column 24A. That is, the connecting beam 40A is rigidly joined to the column 24A, and the inner upper beam 22A is also rigidly joined to the column 24A.

[0027] The column 24A is an upright member that protrudes upward and is provided at the upper end of the column 24 in the main frame 20 that faces the outer shell frame 30. The inner upper beam 22A is rigidly joined to the upper end of the column 24A, which is an upright member, and a two-story open-ceiling space V is formed below the connecting beam 40A.

[0028] (Grid frame) As shown in FIG. 1, a lattice frame is formed by the connecting beam 40A, the outer upper end beam 32A, and the inner upper end beam 22A, and a horizontal structural face H is formed inside this lattice frame.

[0029] 3(A), the strong axis directions of the connecting beam 40A, the outer upper beam 32A, and the inner upper beam 22A are arranged along the horizontal plane. Specifically, the connecting beam 40A, the outer upper beam 32A, and the inner upper beam 22A are each formed using H-shaped steel, and the webs W of these H-shaped steel are arranged along the horizontal plane.

[0030] <Modification> In the above embodiment, the inner upper beam 22A is rigidly joined to the upper end of the column 24A, which is a rising member, and a two-story open space V is formed below the connecting beam 40A, but the embodiment of the present invention is not limited to this.

[0031] For example, as shown in Figure 4, it is possible to omit the pillars 24A, which are risers, and not form an open-ceiling space V below the connecting beams 40A. In such a case, for example, a skylight 50 may be placed between the connecting beams 40A. In this case, braces and the like that would hinder lighting can be omitted between the connecting beams 40A.

[0032] In addition, in the example shown in Figure 3(B), the pillar directly below the pillar 24A, which is the rising member, is omitted, but the embodiment of the present invention is not limited to this. For example, pillars can be provided as appropriate, such as the pillar 24 shown by the two-dot chain line in this figure. Also, beams can be provided as appropriate, such as the beam 22 shown by the two-dot chain line. The same applies to the pillar 24 and beam 22 directly below the inner upper beam 22A shown in Figure 4.

[0033] In addition, in the above embodiment, both the main frame 20 and the shell frame 30 are made of steel, but the embodiment of the present invention is not limited to this. For example, these frames may be made of reinforced concrete or steel-reinforced concrete.

[0034] Furthermore, tie beam 40 may also be made of reinforced concrete or steel-reinforced concrete, provided that the strong axis direction of tie beam 40A is horizontal. For example, if tie beam 40A is made of reinforced concrete, the strong axis direction will be horizontal if the beam width is made larger than the beam depth.

[0035] <Action and effect> In the building structure according to the embodiment of the present invention, tie beams 40 are installed between the main frame 20 and the shell frame 30 of the building 10. Of these, the tie beam 40A located at the top has its strong axis direction aligned with the horizontal plane, and therefore has higher horizontal rigidity between the main frame 20 and the shell frame 30 (horizontal rigidity in the direction along the shell frame 30 [X direction]) than when it is not aligned with the horizontal plane.

[0036] This allows horizontal forces (horizontal forces along the X direction) to be transmitted between the main frame 20 and the outer shell frame 30 without the need to place slabs or braces between them. This allows for the placement of an open atrium V (see FIG. 3(B)) or a skylight 50 (see FIG. 4) instead of slabs or braces, thereby enhancing the openness of the outer periphery of the building 10.

[0037] Furthermore, in the building structure according to an embodiment of the present invention, as shown in FIG. 3, the strong axis directions of both the outer upper beam 32A and the inner upper beam 22A are along the horizontal plane, and a lattice frame is formed by the connecting beam 40A located at the top, the outer upper beam 32A, and the inner upper beam 22A.

[0038] This increases the horizontal rigidity (horizontal rigidity in the direction along the connecting beams 40 [Y direction]) between the main frame 20 and the outer shell frame 30 compared to when the strong axis directions of the outer upper beam 32A and the inner upper beam 22A are not along the horizontal plane. This allows horizontal forces (horizontal forces along the Y direction) to be transmitted between the main frame 20 and the outer shell frame 30.

[0039] In the present invention, as long as the strong axis direction of the connecting beam 40A is along the horizontal plane, the strong axis directions of the outer upper beam 32A and the inner upper beam 22A do not necessarily have to be along the horizontal plane. Even in this configuration, the horizontal rigidity between the main frame 20 and the outer shell frame 30 can be increased compared to a configuration in which there is no beam whose strong axis direction is along the horizontal plane. As such, the present invention can be embodied in various modes. [Explanation of symbols]

[0040] 10 Building 20 Main frame 22A Inside top beam 24A Pillar (standing member) 30 Outer shell frame 32A Outside top beam 40 Connecting beam 40A Connecting beam 50 Top Light V Open-ceiling space

Claims

1. The main structure of the building, an outer shell frame that is disposed apart from the main frame and forms an outer periphery of at least a portion of the building; a connecting beam connecting the main frame and the shell frame; Equipped with The connecting beam arranged at the top is The outer upper beam is rigidly connected to the upper end of the outer shell frame and the inner upper beam of the main frame that faces the outer upper beam, and the strong axis direction is along the horizontal plane. Building structure.

2. The strong axes of both the outer upper end beam and the inner upper end beam are along a horizontal plane, A lattice frame is formed by the connecting beam, the outer upper end beam, and the inner upper end beam arranged at the top. The building structure of claim 1.

3. An upwardly protruding member is disposed at an upper end of the main frame facing the outer shell frame, The inner upper end beam is rigidly connected to the upper end of the rising member, An open-ceiling space is formed below the connecting beam located at the top.

3. A building structure according to claim 1 or 2.

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