Building Structure

Abstract

To provide a building frame that can provide a walkway near a peripheral wall at an upper side of an interior building while reducing construction labor.SOLUTION: In a building frame, a walkway 3 extending in a direction alongside a plurality of columns 2 near columns on an upper side Z1 of an interior building, a beam 4 supported by the columns 2 and extending in a walkway width direction Y orthogonal to a walkway extension direction X in a plan view, and a brace 5 spanning a portion at the upper side Z1 of the column 2 and a portion at a column side Y1 of the beam 4 are provided, and the walkway 3 is provided with the load being supported by the brace 5.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a building frame provided with a walkway at a position adjacent to columns on the upper side inside a building.

Background Art

[0002] Patent Document 1 discloses a building in which a walkway (catwalk 414) is provided along a wall on the upper side inside the building. Such a building is equipped with a building frame that includes columns and beams supported by the columns and extending in the walkway width direction orthogonal to the walkway extending direction in plan view, and is configured such that cantilevered slabs or cantilevered beams for supporting the walkway that project from the columns are provided, and the walkway is supported by the cantilevered slabs or cantilevered beams.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, by providing the cantilevered slabs or cantilevered beams to support the walkway as described above, particularly in the former case, it is necessary to perform formwork work at a high place, which increases the labor in construction.

[0005] In view of this actual situation, the main object of the present invention is to provide a building frame capable of providing a walkway along the peripheral wall on the upper side inside a building while suppressing construction labor.

Means for Solving the Problems

[0006] In the first characteristic configuration of the present invention, there are provided a walkway extending in the arrangement direction of the plurality of columns at a position adjacent to the columns on the upper side inside the building, beams supported by the columns and extending in the walkway width direction orthogonal to the walkway extending direction in plan view, and a brace extending over the upper portion of the column and the column-side portion of the beam, The walkway is provided such that the load is supported by the braces. 、 The corridor is provided with a corridor support beam that extends from the middle of the longitudinal direction of the brace toward the column in the width direction of the corridor, The aforementioned walkway is provided in a manner that it is supported by the walkway support beams. It's at a single point.

[0007] With this configuration, by providing braces across the upper part of the column and the column-side part of the beam, the cross-section of the beam can be reduced. Furthermore, by having the braces support the load of the walkway, the braces can be used as support members for the walkway. This eliminates the need to provide cantilevered slabs or steel cantilevered beams that extend from the columns to support the walkway, thereby reducing construction effort.

[0008] The second characteristic configuration of the present invention is, The aforementioned walkway support beam is, A cantilever beam extending in a cantilevered manner from the midpoint of the brace in the longitudinal direction toward the column in the width direction of the walkway. That is It's at a single point.

[0009] According to this configuration, by using cantilever beams to support the walkway, it is not necessary to connect the column-side end of the cantilever beam to the column, thus further reducing construction effort. [Brief explanation of the drawing]

[0010] [Figure 1] Longitudinal cross-sectional view showing the building frame structure at the top of the building. [Figure 2] A longitudinal cross-sectional view showing a portion of the building's structural framework at the top of the building. [Figure 3] Cross-sectional view AA in Figure 2 [Figure 4] Side view showing the support structure of the walkway. [Modes for carrying out the invention]

[0011] An embodiment of the building frame according to the present invention will be described based on the drawings. Figure 1 is a longitudinal cross-sectional side view showing the building frame 1 at the top of the building. As shown in Figure 1, the building frame 1 is suitable for use in buildings such as gymnasiums that have large open spaces. As shown in Figures 1 to 3, the building frame 1 is provided with a walkway 3 extending in the direction of the arrangement of multiple columns 2 at the upper Z1 side of the interior of the building, beams 4 supported by the columns 2 and extending in the walkway width direction Y perpendicular to the walkway extension direction X in a plan view, and braces 5 extending from the upper Z1 portion of the columns 2 to the column-side portion of the beams 4. Figure 2 is a longitudinal cross-sectional side view showing a part of the building frame 1 at the top of the building, and Figure 3 is a cross-sectional view at AA in Figure 2. Furthermore, the handrail 18 for fall prevention is shown only in Figure 1 and is omitted from Figures 2 to 4.

[0012] In this embodiment, the columns 2 are perimeter columns provided on the outer perimeter of the building, and the building frame 1 is composed of a plurality of columns 2 (perimeter columns) arranged in the direction of the walkway extension X, and perimeter beams 8 extending in the direction of the walkway extension X. As shown in Figure 3, walls 9 are constructed within the building frame 1, and the walkway 3, which is provided near the columns as described above, can also be said to be provided near the walls. The columns 2, perimeter beams 8, and walls 9 are made of reinforced concrete.

[0013] As shown in Figures 1 and 2, although the columns 2 are mainly made of reinforced concrete as described above, the upper end Z1 is made of steel, and the main reinforced concrete portion 2A and the upper steel portion 2B of the column 2 are joined by anchor bolts. Windows (not shown) are provided between the upper portions 2B of the columns 2, which are aligned in the direction X of the walkway extension, to let in sunlight. Beam 4 is a roof beam (ceiling beam) and is erected across a column 2 (the left column 2 in Figure 1, and shown in Figure 2) constructed at one end of the building in the walkway width direction Y, and a column 2 (the right column 2 in Figure 1, and not shown in Figure 2) constructed at the other end of the building in the walkway width direction Y. As shown in Figure 2, beam 4 is made of H-shaped steel, and the outer end Y1 of beam 4 is joined to the upper end portion 2B of 2 by welding or the like.

[0014] Hereinafter, the diagonal brace 5 and the walkway 3 will be described. The side where the column 2 is located relative to the walkway 3 in the walkway width direction Y is referred to as the outer side Y1 (the same side as the column side), and the opposite side is referred to as the inner side Y2 for the description. In addition, the walkway extending direction X is the same as the direction in which the columns 2 are arranged.

[0015] The diagonal brace 5 has a beam-side end portion 5A (the end portion on the upper side Z1 and the end portion on the inner side Y2) joined to the lower surface of the beam 4, and a column-side end portion 5B (the end portion on the lower side Z2 and the end portion on the outer side Y1) joined to the surface of the column 2 on the inner side Y2, and is provided in an inclined posture where the closer to the outer side Y1, the more the position is on the lower side Z2. Specifically, the beam-side plate 11 is joined to the lower surface of the beam 4 by welding, and the column-side plate 12 is joined to the surface of the column 2 on the outer side Y1 by anchor bolts. The diagonal brace 5 is made of H-shaped steel, and the beam-side end portion 5A of the diagonal brace 5 is bolted to the beam-side plate 11, so that the beam-side end portion 5A of the diagonal brace 5 is joined to the lower surface of the beam 4, and the column-side end portion 5B of the diagonal brace 5 is bolted to the column-side plate 12, so that the column-side end portion 5B of the diagonal brace 5 is joined to the surface of the column 2 on the inner surface side.

[0016] As shown in Figure 2 and Figure 4, the walkway 3 is provided in a state where the load is supported by the diagonal brace 5. To further explain, a support structure portion 14 for supporting the walkway 3 is joined to the diagonal brace 5, and the walkway 3 is fixed to the outer beam member 16 and the inner beam member 17 by fasteners (not shown). In this way, the walkway 3 is fixed to the support structure portion 14 joined to the diagonal brace 5, so that the walkway 3 is provided in a state where the load is supported by the diagonal brace 5.

[0017] As shown in Figure 3 and Figure 4, the support structure portion 14 includes a cantilever beam 15 extending in the walkway width direction Y, and an outer beam member 16 and an inner beam member 17 extending in the walkway extending direction X, forming a beam assembly. The cantilever beam 15 is made of H-shaped steel, the outer beam member 16 is made of channel steel, and the inner beam member 17 is made of angle steel.

[0018] As shown in Figure 2 and Figure 4, the cantilever beam 15 is provided in a state of cantilevering from the intermediate portion in the length direction of the diagonal brace 5 to the outer side Y1 in the walkway width direction Y. That is, the cantilever beam 15 is positioned between the column 2 and the diagonal brace 2 in an attitude extending in the walkway width direction Y, with its end on the inner side Y2 joined to the diagonal brace 5, and is joined only to the diagonal brace 5 out of the diagonal brace 5 and the column 2. As shown in Figure 2, the cantilever beam 15 is joined at a position 1 / 4 of the full length from the lower end of the diagonal brace 5.

[0019] As shown in Figure 3, the outer beam member 16 is installed spanning across the pair of cantilever beams 15 arranged in the walkway extension direction X, with both ends in the walkway extension direction X joined to the outer side ends in the walkway width direction Y of the pair of cantilever beams 15. Further, the inner beam member 17 is installed spanning across the pair of cantilever beams 15 arranged in the walkway extension direction X, with both ends in the walkway extension direction X joined to the inner side ends in the walkway width direction Y of the cantilever beams 15. By joining the cantilever beams 15, the outer beam member 16 and the inner beam member 17 in this manner, a ladder-shaped support structure portion 14 is configured.

[0020] Both the diagonal brace 5 and the cantilever beam 15 are made of H-shaped steel, and by configuring both the diagonal brace 5 and the cantilever beam 15 with steel materials in this way, pre-assembly on the ground is enabled. Further, the cantilever beam 15 is provided in a state of cantilevering from the diagonal brace 5, and a gap is formed between the walkway 3 supported by the cantilever beam 15, the column 2 and the wall 9. By installing a wall material (for example, a dry wall) that constructs the inner wall surface on the inner side Y2 of the column 2 and the wall 9, the gap formed between the walkway 3, the column 2 and the wall 9 is reduced or closed. Further, a fall-preventing handrail 18 (see Figure 1) is erected at the end on the inner side Y2 of the support structure portion 14.

[0021] The walkway 3 is configured by arranging steel plate members 19 such as perforated steel plates in the walkway extension direction X, and is supported by the outer beam member 16 and the inner beam member 17. Each of the steel plate members 19 is placed on the support structure 14 and fixed to the outer side beam member 16 and the inner side beam member 17 using fasteners (not shown). The walkway 3 is placed on the outer side beam member 16 and the inner side beam member 17, which are joined to the cantilever beam 15, and is therefore indirectly supported by the cantilever beam 15 via the outer side beam member 16 and the inner side beam member 17.

[0022] As described above, a walkway 3 is provided that extends in the walkway extension direction X from the upper Z1 column inside the building, a beam 4 is supported by the column 2 and extends in the walkway width direction Y in a plan view, and a brace 5 is provided that spans the upper Z1 portion of the column 2 and the outer Y1 portion of the beam 4, with the walkway 3 being supported by the brace 5. By providing the brace 5 in this way, the cross-section of the beam 4 can be reduced, and the brace 5 can be used as a support material for the walkway 3 by supporting the load of the walkway 3 on the brace 5. This eliminates the need to provide cantilevered slabs or steel cantilevered beams that can be projected from the column 2 to support the walkway 3, thereby reducing construction effort.

[0023] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0024] (1) In the above embodiment, the walkway 3 was supported by a cantilever beam 15 joined only to the brace 5 of the two columns 2, and an example was described in which the load of the walkway 3 is supported only by the brace 5. However, the walkway 3 may also be supported by a double-support beam joined to both the brace 5 and the column 2, so that the load of the walkway 3 is supported by both the brace 5 and the column 2.

[0025] (2) In the above embodiment, an example was described in which the column 2 is an outer perimeter column and the walkway 3 is provided along the outer perimeter column (along the wall). However, the column 2 may be an intermediate column located in the middle of the walkway width direction Y inside the building, and the walkway 3 may be provided along the intermediate column. [Explanation of Symbols]

[0026] 1 Building frame 2 pillars 3 corridors 4 beams 5-way cane 15. Cantilever beam X Corridor extension direction (direction of column alignment) Y-direction of corridor width Y1 Exterior side (column side) Z1 upper side

Claims

1. A walkway is provided at the upper side of the columns inside the building, extending in the direction of the alignment of the columns, a beam is supported by the columns and extends in the direction of the walkway width, perpendicular to the direction of the walkway extension in a plan view, and a brace is provided that spans the upper part of the columns and the column-side part of the beam. The walkway is provided such that the load is supported by the brace, The corridor is provided with a corridor support beam that extends from the middle of the longitudinal direction of the brace toward the column in the width direction of the corridor, The aforementioned walkway is a building structure provided in which the walkway support beams are supported.

2. The building frame according to Claim 1, wherein the corridor support beam is a cantilever beam that extends in a cantilevered manner from the middle of the length of the brace toward the column in the width direction of the corridor.

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