Building structural framework

Abstract

The objective is to provide a building structure that can reduce the cost of the building's structural frame by reducing the number of braces. [Solution] A building frame structure 1 having an inner column 4 arranged inside a plurality of side columns 3, characterized in that it is equipped with four braces 10 arranged in a cross shape in a plan view with the inner column 4 at its center.

Description

Technical Field

[0001] The present invention relates to a building frame structure having inner columns arranged inside a plurality of side columns.

Background Art

[0002] For example, as a building frame structure used as a logistics warehouse or the like, there is known one having inner columns arranged inside a plurality of side columns and braces for enhancing earthquake resistance (see, for example, Patent Document 1).

[0003] In such a building frame structure, from the viewpoint of improving the usability of the building, the braces were generally installed between two side columns arranged along the outer wall of the building.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in a configuration where braces are installed between two side columns as in the conventional building frame structure, in order to obtain the desired earthquake resistance, it is necessary to install a large number of braces along the outer wall, resulting in a problem that the construction cost of the building increases.

[0006] The present invention has been made in view of such problems, and an object thereof is to provide a building frame structure capable of reducing the cost of the building frame structure by reducing the number of braces.

Means for Solving the Problems

[0007] The building frame structure of the present invention is a building frame structure having an inner column arranged inside a plurality of side columns, and is characterized by having four braces arranged in a cross shape in a plan view with respect to the inner column.

[0008] In the building frame structure of the present invention, it is preferable that, in the above configuration, fire compartment walls are arranged in a cross shape in plan view with the inner column as the center, and that the four braces are arranged along the corresponding fire compartment walls.

[0009] In the building frame structure of the present invention, it is preferable that each of the four braces is equipped with a seismic damper. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a building frame structure that can reduce the cost of the building's frame structure by reducing the number of braces. [Brief explanation of the drawing]

[0011] [Figure 1] This is a floor plan of a building structure according to one embodiment of the present invention, showing a floor where braces are installed. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3] This is a cross-sectional view along line BB in Figure 1. [Figure 4] This is a plan view showing an enlarged view of area C in Figure 1. [Figure 5] This is a front view showing an enlarged section of the building's structural frame, as shown in Figure 1, where the braces are installed. [Modes for carrying out the invention]

[0012] The following describes in detail, with reference to the drawings, the structural framework of a building according to one embodiment of the present invention.

[0013] The building frame structure 1 (hereinafter also simply referred to as "frame structure 1") according to one embodiment of the present invention shown in Figures 1, 2, and 3 is used in a building 2, for example, a logistics warehouse. In this embodiment, building 2 is a five-story logistics warehouse.

[0014] Furthermore, the building 2 to which structural frame 1 applies is not limited to logistics warehouses. Also, the number of floors in building 2 to which structural frame 1 applies can be changed as appropriate.

[0015] The structural frame 1 comprises a plurality of side columns 3 arranged along the outer wall 2a of the building 2, and a plurality of inner columns 4 arranged inside the plurality of side columns 3, that is, inside the building 2 beyond the side columns 3. In Figures 1, 2, and 3, for convenience, only some of the side columns 3 and some of the inner columns 4 are labeled with reference numerals.

[0016] In the structural frame 1 according to this embodiment, the multiple side columns 3 and multiple interior columns 4 are made of SRC (steel-reinforced concrete) from the 1st to the 4th floor, and of S (steel frame) from the 5th floor. Note that the multiple side columns 3 and multiple interior columns 4 are not limited to the combination of SRC and S described above, but may also be made of other structures, such as SRC or S alone.

[0017] As shown in Figures 2 and 3, beams 5 are spanned between adjacent side columns 3, between adjacent inner columns 4, and between adjacent side columns 3 and inner columns 4. In Figures 2 and 3, for convenience, only some of the beams 5 are labeled.

[0018] In the structural frame 1 according to this embodiment, each of the multiple beams 5 is made of steel (S). However, the multiple beams 5 are not limited to being made of steel.

[0019] As shown in Fig. 1, each floor from the first floor to the fourth floor of the building 2 is partitioned into a plurality of spaces 8 by a plurality of fire compartment walls 6 extending vertically in Fig. 1 and a plurality of fire compartment walls 7 extending horizontally in Fig. 1. These spaces 8 each have a floor area of 1500 square meters or less and are rectangular in plan view. In Fig. 1, for the sake of convenience, only some of the fire compartment walls 6, 7 and spaces 8 are labeled. These spaces 8 are each spaces used as warehouses. In the present embodiment, in Fig. 1, a vehicle road 9a extending horizontally is provided at the central part of the building 2, and truck berths 9b are arranged on both sides of the vehicle road 9a. On the upper and lower both sides sandwiching these vehicle road 9a and truck berths 9b, 18 spaces 8 are arranged in two rows with 9 spaces in the horizontal direction side by side respectively.

[0020] The fire compartment wall 6 and the fire compartment wall 7 are arranged to cross in a cross shape in plan view at the part where the inner column 4 is arranged. Further, the fire compartment wall 6 and the fire compartment wall 7 are each arranged along a plurality of inner columns 4.

[0021] The body structure 1 includes four braces 10 arranged in a cross shape in plan view around the inner column 4. These four braces 10 constitute a seismic structure portion 20 in the inner part of the body structure 1. By providing the seismic structure portion 20 with the four braces 10, the seismic resistance of the body structure 1 or the building 2 is enhanced. In the present embodiment, at each floor from the first floor to the fourth floor of the body structure 1, 16 seismic structure portions 20 are provided centered on the intersection of the fire compartment walls 6 and 7 arranged so as to partition four spaces 8 respectively. The configurations of the respective seismic structure portions 20 provided in the body structure 1 are basically the same as each other. Among the 16 seismic structure portions 20, eight seismic structure portions 20 located above the roadway 9a in FIG. 1 are arranged on the same straight line in plan view, and the other eight seismic structure portions 20 located below the roadway 9a are also arranged on the same straight line in plan view. Further, the eight seismic structure portions 20 located above the roadway 9a and the other eight seismic structure portions 20 located below the roadway 9a are arranged at positions symmetric with each other across the roadway 9a. In FIGS. 2 and 3, for the sake of convenience, reference numerals are attached only to some of the seismic structure portions 20 provided in the fourth floor portion.

[0022] As shown in FIGS. 4 and 5, the four braces 10 constituting the seismic structure portion 20 are respectively arranged in a rectangular space surrounded by a pair of adjacent inner columns 4 and a pair of upper and lower beams 5 joined to these inner columns 4. As shown in FIG. 5, in the present embodiment, each brace 10 has a K shape. That is, each brace 10 has a first diagonal member 11 having one end joined to the lower end of one inner column 4 and the other end joined near the center of the upper beam 5, and a second diagonal member 12 having one end joined to the lower end of the other inner column 4 and the other end joined near the center of the upper beam 5. The first diagonal member 11 and the second diagonal member 12 are each formed of H-shaped steel and are joined to the lower end of the inner column 4 or the beam 5 via gusset plates 13, 14.

[0023] In this embodiment, the four braces 10 are each K-type, but the invention is not limited to this, and other types such as V-type, X-type, or shear link type may also be used. Furthermore, the first diagonal members 11 and the second diagonal members 12 are not limited to being made of H-shaped steel, but may be made of other materials such as steel pipes.

[0024] As shown in Figure 4, each brace 10 is positioned along the fire compartment walls 6 and 7. In other words, in the structural frame 1 according to this embodiment, the four braces 10 constituting the seismic-resistant structural section 20 are arranged in a cross shape in plan view, centered on the inner column 4 located at the intersection of the fire compartment walls 6 and 7. Therefore, each brace 10 is positioned along the corresponding fire compartment walls 6 and 7, and one side of it is covered by the corresponding fire compartment walls 6 and 7.

[0025] Furthermore, an opening connecting adjacent spaces 8 may be provided in the lower part of the fire compartment wall 6 adjacent to the brace 10, between the first diagonal member 11 and the second diagonal member 12.

[0026] As shown in Figure 5, each brace 10 can also be configured to include a seismic damper 15. In this embodiment, the first diagonal member 11 and the second diagonal member 12 constituting the brace 10 are each configured to include a friction-type brake damper as the seismic damper 15. In other words, in this embodiment, the brace 10 is a seismic brace. By configuring each brace 10 to include a seismic damper 15 in this way, the seismic resistance of the structural frame 1, i.e., the building 2, can be further enhanced.

[0027] Furthermore, the vibration damping damper 15 provided on the brace 10 is not limited to a friction-type brake damper, but may be of other configurations. Also, the brace 10 may be configured without a vibration damping damper 15.

[0028] As described above, in the structural frame 1 of this embodiment, in the structural frame 1 of a building 2 having inner columns 4 arranged inside a plurality of side columns 3, when providing braces 10 to the structural frame 1 to enhance the seismic resistance of the structural frame 1 or building 2, four braces 10 are arranged in a cross shape in a plan view with the inner column 4 as the center, so that the seismic resistance of the structural frame 1 or building 2 can be efficiently enhanced with a small number of braces 10. In other words, when an earthquake occurs, the inner columns 4 located inside the building 2 will be subjected to a larger axial force than the side columns 3 arranged along the outer wall 2a of the building 2, so larger braces 10 with greater load-bearing capacity can be concentrated and arranged around the inner columns 4. As a result, in the structural frame 1 of this embodiment, the same seismic resistance can be obtained with a smaller number of braces 10 installed throughout the structural frame 1 compared to when braces are installed between adjacent side columns 3. Therefore, according to the structural frame 1 of this embodiment, the number of braces 10 provided throughout the structural frame 1 can be reduced, thereby reducing the cost of the structural frame 1.

[0029] Furthermore, in the structural frame 1 according to this embodiment, the four braces 10 are arranged in a cross shape in a plan view with the inner column 4 as the center. As shown in Figures 4 and 5, the four braces 10 can be installed by fixing the gusset plates 13 and 14 to the five inner columns 4. In contrast, in Figure 1, if two braces 10 extending in the left-right direction and two braces 10 extending in the up-down direction are arranged in a straight line with each inner column 4 as the center, then in order to install the four braces 10, it would be necessary to fix the gusset plates 13 and 14 to three inner columns 4 in each direction, i.e., a total of six inner columns 4. Thus, in the structural frame 1 according to this embodiment, the number of inner columns 4 to which the gusset plates 13 and 14 are fixed can be reduced, which also reduces the cost of the structural frame 1.

[0030] Furthermore, in the structural frame 1 according to this embodiment, the four braces 10 constituting the seismic-resistant structural section 20 are arranged along the fire compartment walls 6 and 7. That is, in the structural frame 1 according to this embodiment, the four braces 10 are arranged in a cross shape centered on the interior column 4 located at the intersection of the fire compartment walls 6 and 7 in the interior part of the building 2 in a plan view, so all four braces 10 are arranged along the fire compartment walls 6 and 7. With this configuration, in a building 2 with a floor area where it is essential to provide fire compartment walls 6 and 7, the seismic-resistant structural section 20 equipped with four braces 10 can be placed in the interior part of the building 2 without sacrificing the usability of the building 2 in terms of architectural planning, for example, by placing the braces 10 in unnecessary parts.

[0031] The present invention is not limited to the embodiments described above, and it goes without saying that various modifications are possible without departing from the spirit of the invention.

[0032] For example, in the above embodiment, the structural frame 1 is configured such that multiple inner columns 4 are arranged inside multiple side columns 3, but it is not limited to this configuration, and there may be only one inner column 4.

[0033] Furthermore, the locations where the seismic-resistant structural section 20, i.e., the four braces 10, are provided in the structural frame 1 can be changed as appropriate. [Explanation of symbols]

[0034] 1. Building structural framework 2 buildings 3 side pillars 4. Inner pillar 5 Beam 6. Fire-resistant partition wall 7. Fire-resistant partition wall 8 spaces 9a roadway 9b Track berth 10 Brace 11 1st diagonal member 12 2nd diagonal 13 Gusset Plate 14 gusset plates 15. Seismic dampers 20 Earthquake-resistant structure department

Claims

1. A building frame structure having an inner column positioned inside multiple side columns, A building frame structure characterized by having four braces arranged in a cross shape in plan view, with the aforementioned inner column at its center.

2. The fire compartment walls are arranged in a cross shape in a plan view, with the aforementioned inner column at the center. The building frame structure according to claim 1, wherein the four braces are arranged along the corresponding fire compartment walls.

3. The building frame structure according to claim 1 or 2, wherein each of the four braces is equipped with a seismic damper.

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