Tension brace fitting structure

Abstract

To reduce compressive force acting on a tension brace.SOLUTION: A tension brace fitting structure comprises: a pair of gusset plates 20 provided on a frame 10; a tension brace 30 connected to the pair of gusset plates 20; a cylindrical member 40 provided on the gusset plate 20 and holding the tension brace 30 in a slidable manner; and a flange portion 36 provided at an end side of the tension brace 30 protruding from the cylindrical member 40 and engaging with the cylindrical member 40.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a tension brace mounting structure. [Background technology]

[0002] A brace structure is known that suppresses a decrease in the tensile force of a tension brace due to slack in the tension brace (see, for example, Patent Document 1).

[0003] Also, a compression deformation release device that prevents a compressive force from acting on a tension brace is known (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-348954 A [Patent Document 2] JP 2003-090144 A Summary of the Invention [Problem to be solved by the invention]

[0005] Although the compression deformation release device disclosed in Patent Document 2 can suppress buckling of the tension brace, there is room for further improvement.

[0006] In consideration of the above, the present invention aims to reduce the compressive force acting on a tension brace. [Means for solving the problem]

[0007] The tension brace mounting structure described in claim 1 comprises a pair of gusset plates provided on a frame, a tension brace connected to the pair of gusset plates, a retaining portion provided on the gusset plate and configured to slidably hold the tension brace, and an engaging portion provided on the end side of the tension brace protruding from the retaining portion and engaging with the retaining portion.

[0008] According to the tension brace mounting structure of claim 1, a pair of gusset plates is provided on a frame. A tension brace is connected to the pair of gusset plates. The gusset plates are provided with a retaining portion. The retaining portion slidably holds the tension brace. An engaging portion that engages with the retaining portion is provided on the end side of the tension brace protruding from the retaining portion.

[0009] When the gap between the pair of gusset plates widens due to deformation (shear deformation) of the frame during an earthquake, the engaging portion on the end side of the tension brace engages with the retaining portion, and a tensile force acts on the tension brace. The tension brace resists this tensile force, reducing the deformation of the frame.

[0010] On the other hand, when the gap between the pair of gusset plates narrows due to deformation of the frame during an earthquake, the tension brace slides against the retaining part, reducing the compressive force acting on the tension brace. This reduces the buckling of the tension brace and the damage of the gusset plate.

[0011] In addition, by providing a retaining portion on the gusset plate and an engaging portion on the end side of the tension brace, the maintainability of the retaining portion and the engaging portion is improved.

[0012] The tension brace mounting structure according to a second aspect of the present invention is the tension brace mounting structure according to the first aspect, further comprising a buffer material provided between the retaining portion and the engaging portion.

[0013] According to the tension brace mounting structure of claim 2, a buffer material is provided between the retaining portion and the engaging portion. As a result, during an earthquake, the buffer material deforms between the retaining portion and the engaging portion, absorbing vibration energy.

[0014] Therefore, deformation of the frame is further suppressed, and damage to the holding parts, gusset plates, etc. The cushioning material also reduces the impact noise of the engagement parts against the holding parts.

[0015] The tension brace mounting structure described in claim 3 is the tension brace mounting structure described in claim 1 or claim 2, further comprising a shuttlecock joined to the gusset plate, and the retaining portion is a tubular member through which the tension brace passes and which is welded to the shuttlecock.

[0016] According to the tension brace mounting structure of claim 3, the shuttlecock is joined to the gusset plate. The retaining portion is a cylindrical member through which the tension brace passes. The cylindrical member is welded to the shuttlecock.

[0017] By passing the tension brace through the tubular member welded to the shuttlecock in this manner, the tension brace can be slidably held in place with a simple structure. Effect of the Invention

[0018] As described above, according to the present invention, the compressive force acting on the tension brace can be reduced. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a plan view showing a pair of tension braces attached to a frame by the tension brace mounting structure according to the first embodiment. [Diagram 2] FIG. 2 is an enlarged plan view showing the joint between the tension brace and the gusset plate shown in FIG. 1. [Diagram 3] 3 is a cross-sectional view taken along line 3-3 of FIG. 2. [Figure 4] FIG. 3 is an enlarged plan view corresponding to FIG. 2, illustrating a state in which the rod of the tension brace slides relative to the tubular member during an earthquake. [Diagram 5] FIG. 3 is an enlarged plan view corresponding to FIG. 2, showing a tension brace mounting structure according to a second embodiment. [Figure 6] FIG. 6 is an enlarged plan view corresponding to FIG. 5, illustrating a state in which the rod of the tension brace slides relative to the tubular member during an earthquake. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] First embodiment First, the first embodiment will be described.

[0021] (frame) 1 shows a pair of tension braces 30 attached to a frame 10 by the tension brace mounting structure according to the first embodiment. The frame 10 is, as an example, a rectangular planar frame that constitutes a roof frame.

[0022] The frame 10 has a plurality of columns 12 arranged at each corner of the frame 10, and a plurality of beams 14 erected between adjacent columns 12. The columns 12 and beams 14 are, as an example, made of steel. The frame 10 is reinforced (earthquake-resistant reinforcement) by a pair of tension braces 30.

[0023] (Reinforcement brace) As an example, the pair of tension braces 30 are X-shaped horizontal braces. Specifically, the pair of tension braces 30 are respectively connected to a pair of gusset plates 20 provided at diagonal corners of the frame 10, and are arranged in an X shape when the frame 10 is viewed from the out-of-plane direction.

[0024] As an example, each tension brace 30 is a turnbuckle brace. The tension brace 30 has a pair of rods 32 and a turnbuckle (turnbuckle body) 34.

[0025] The pair of rods 32 are formed of, for example, round steel bars. Male threads are provided on one ends of the pair of rods 32. The one ends of the pair of rods 32 are connected via turnbuckles 34.

[0026] Reverse threaded holes are formed on both ends of the turnbuckle 34 in the longitudinal direction. Male threads on one ends of the pair of rods 32 are screwed into these threaded holes. The turnbuckle 34 makes it possible to adjust the tensile force applied to the pair of rods 32.

[0027] 2, the other end of the rod 32 is connected to the gusset plate 20 via a tubular member 40 and a shuttlecock 42. The tubular member 40 is a cylindrical steel sleeve. The other end of the rod 32 slidably passes through the inside of the tubular member 40.

[0028] A flange portion 36, which is an example of an engagement portion, is provided at the other end of the rod 32 protruding from the tubular member 40. The flange portion 36 is formed in a disk shape from a steel plate or the like, and protrudes like a brim from the other end of the rod 32. The flange portion 36 is joined to the other end of the rod 32 by welding or the like. In the initial state (non-earthquake), the flange portion 36 is engaged with the end face of the tubular member 40.

[0029] 3, the outer peripheral surface of the tubular member 40 is abutted against the surface of the shuttlecock 42. In this state, the outer peripheral surface of the tubular member 40 is joined to the surface of the shuttlecock 42 by fillet welding or the like from both sides along the axial direction.

[0030] 2, the shuttlecock 42 is joined to the gusset plate 20 by a bolt 44 and a nut (not shown) while being overlapped on the gusset plate 20. The shuttlecock 42 is rotatable relative to the gusset plate 20 around the shaft of the bolt 44.

[0031] The bolt 44 and the tubular member 40 are disposed with a gap therebetween in the axial direction of the tubular member 40. This prevents the flange portion 36 provided at the other end of the rod 32 from interfering with the bolt 44 during an earthquake.

[0032] It should be noted that the shuttlecock 42 may be joined to the gusset plate 20 by means other than the bolts 44 and nuts, for example, welding or the like.

[0033] (action) Next, the operation of the first embodiment will be described.

[0034] As shown in Fig. 1, according to this embodiment, a pair of gusset plates 20 are provided at diagonal corners of a frame 10. A tension brace 30 is connected to the pair of gusset plates 20.

[0035] 2, a tubular member 40 is provided on the gusset plate 20 via a shuttlecock 42. The tubular member 40 is formed in a cylindrical shape, and the other end of the rod 32 of the tension brace 30 is slidably inserted therein.

[0036] Further, a flange portion 36 is provided on the other end of the rod 32 protruding from the cylindrical member 40. The flange portion 36 protrudes like a brim from the other end of the rod 32, and is engaged with the end face of the cylindrical member 40 in the initial state.

[0037] Here, when the gap between the pair of gusset plates 20 widens due to deformation (shear deformation) of the frame 10 (see FIG. 1) during an earthquake, as shown by arrow S1, the flange portion 36 provided at the other end of the rod 32 of the tension brace 30 engages with the end face of the tubular member 40, and a tensile force acts on the tension brace 30. The tension brace 30 resists this tensile force, thereby reducing the deformation of the frame 10.

[0038] On the other hand, when the gap between the pair of gusset plates 20 narrows due to deformation of the frame 10 during an earthquake, the rod 32 of the tension brace 30 slides along the tubular member 40 as shown by the arrow S2 in Fig. 4. This reduces the compressive force acting on the tension brace 30. Therefore, buckling of the tension brace 30 and damage to the gusset plates 20 are suppressed.

[0039] In this manner, in this embodiment, it is possible to suppress buckling of the tension brace 30 and damage to the gusset plate 20 during an earthquake. In addition, by providing the tubular member 40 on the gusset plate 20 and providing the flange portion 36 on the other end of the rod 32 of the tension brace 30, the maintainability of the tubular member 40 and the flange portion 36 is improved.

[0040] In addition, in this embodiment, the rod 32 of the tension brace 30 is inserted through the tubular member 40 welded to the shuttlecock 42, thereby enabling the tension brace 30 to be slidably held with a simple configuration.

[0041] Furthermore, in this embodiment, by using standardized products for the shuttlecock 42 and the rod 32, costs can be reduced.

[0042] In addition, by slidably holding the rod 32 of the tension brace 30 by the tubular member 40, it is possible to easily ensure the welding length between the tubular member 40 and the shuttlecock 42. Therefore, the joint strength between the tubular member 40 and the shuttlecock 42 can be easily increased.

[0043] Furthermore, in this embodiment, the tension brace 30 is configured to have a pair of rods 32. The pair of rods 32 are formed from round steel bars. As a result, in this embodiment, the weight of the tension brace 30 can be reduced while suppressing buckling of the pair of rods 32.

[0044] Second Embodiment Next, a second embodiment will be described. In the second embodiment, the same reference numerals will be used to designate the same members as in the first embodiment, and the description thereof will be omitted as appropriate.

[0045] 5 and 6, in the brace mounting structure according to the second embodiment, a buffer material 50 is provided between the tubular member 40 and the flange portion 36. The buffer material 50 is made of, for example, an elastic material such as rubber or a viscoelastic material, and is capable of absorbing earthquake energy by deforming.

[0046] The cushioning material 50 is formed in a disk shape with a through hole formed in the center thereof. The rod 32 of the tension brace 30 protruding from the tubular member 40 passes through this through hole. In this embodiment, the cushioning material 50 is formed by an adhesive or the like in a state where it is overlapped on the flange portion 36.

[0047] The shape of the cushioning material 50 is not limited to a disk shape and can be changed as appropriate. In the present embodiment, the cushioning material 50 is joined to the flange portion 36, but the cushioning material 50 does not have to be joined to the flange portion 36 or the cylindrical member 40.

[0048] In this embodiment, the rod 32 of the tension brace 30 penetrates the buffer material 50. However, the buffer material 50 only needs to be interposed between the tubular member 40 and the flange portion 36, and the rod 32 of the tension brace 30 does not need to penetrate the buffer material 50.

[0049] (action) Next, the operation of the second embodiment will be described.

[0050] As shown in FIG. 5, according to this embodiment, a buffer material 50 is provided between the tubular member 40 and a flange portion 36 provided at the other end of the rod 32 of the tension brace 30 protruding from the tubular member 40.

[0051] As a result, when the gap between the pair of gusset plates 20 widens in accordance with deformation (shear deformation) of the frame 10 (see FIG. 1) during an earthquake, the buffer material 50 deforms (compressively deforms) between the flange portion 36 provided at the other end of the rod 32 of the tension brace 30 and the tubular member 40, as shown by arrow S1. This deformation of the buffer material 50 absorbs earthquake energy. Therefore, deformation of the frame 10 is further suppressed, and damage to the tubular member 40, the gusset plate 20, etc. is suppressed.

[0052] Thereafter, when the flange portion 36 provided on the other end of the rod 32 of the tension brace 30 engages with the end face of the tubular member 40 via the buffer material 50, a tension force acts on the tension brace 30. The tension brace 30 resists this tension force, thereby reducing deformation of the frame 10.

[0053] On the other hand, as shown in Fig. 6, when the gap between the pair of gusset plates 20 narrows due to deformation (shear deformation) of the frame 10 during an earthquake, the rod 32 of the tension brace 30 slides along the tubular member 40 as shown by the arrow S2. This reduces the compressive force acting on the tension brace 30. Therefore, buckling of the tension brace 30 and damage to the gusset plates 20 are suppressed.

[0054] 5, when the gap between the pair of gusset plates 20 widens again, the rod 32 of the tension brace 30 slides in the opposite direction along the tubular member 40, and the flange portion 36 provided at the other end of the rod 32 collides (engages) with the end face of the tubular member 40 via the buffer material 50. At this time, if the flange portion 36 directly collides with the end face of the tubular member 40, a loud collision sound may be generated.

[0055] In contrast, in this embodiment, as described above, the cushioning material 50 is provided between the flange portion 36 and the tubular member 40. As a result, the flange portion 36 collides with the end face of the tubular member 40 via the cushioning material 50, thereby reducing the collision noise.

[0056] In this manner, in this embodiment, by providing the buffer material 50 between the tubular member 40 and the flange portion 36, it is possible to absorb earthquake energy while reducing impact noise.

[0057] (Modification) Next, modified examples of the first and second embodiments will be described. Note that, although various modified examples will be described below using the first embodiment as an example, these modified examples can also be appropriately applied to the second embodiment.

[0058] In the above first embodiment, the tubular members 40 are provided on the pair of gusset plates 20, and the flange portions 36 are provided on the other ends of the pair of rods 32 of the tension brace 30. However, the tubular members 40 can be provided on at least one of the pair of gusset plates 20. Similarly, the flange portions 36 can be provided on at least one of the pair of rods 32 of the tension brace 30.

[0059] Also, in the above first embodiment, the retaining portion is the tubular member 40. However, the retaining portion is not limited to the tubular member 40, and may be, for example, a through hole through which the rod 32 of the tension brace 30 passes, or a steel plate with a U-shaped groove formed therein.

[0060] In the first embodiment, the cylindrical member 40 is provided on the shuttlecock 42. However, the cylindrical member 40 is not limited to the shuttlecock 42, and may be provided on the gusset plate 20, for example.

[0061] In the first embodiment, the flange portion 36 is provided on the other end of the rod 32 of the tension brace 30. However, the flange portion 36 is not limited to being provided on the other end of the rod 32 of the tension brace 30, and may be provided on the other end side (end side) of the rod 32.

[0062] In the first embodiment, the engaging portion is the flange portion 36. However, the engaging portion is not limited to the flange portion 36, and may be, for example, a nut, a washer, or the like that is attached to the other end of the rod 32 of the tension brace 30 and engaged with the end face of the tubular member 40.

[0063] In the first embodiment, the tension brace 30 is configured to have the rod 32. However, the tension brace 30 is not limited to a bar material such as the rod 32, and may be configured to have, for example, a wire material such as a PC steel wire.

[0064] In the first embodiment, the tension brace 30 is configured to have the turnbuckle 34. However, the tension brace 30 may be configured to have another tension adjustment mechanism, not limited to the turnbuckle 34. The tension adjustment mechanism may be provided as necessary, and may be omitted as appropriate.

[0065] In the first embodiment, the pair of tension braces 30 are X-shaped braces. However, the tension braces 30 are not limited to X-shaped braces, and may be, for example, V-shaped braces, K-shaped braces, or single-sided braces.

[0066] Furthermore, in the first embodiment, the tension brace 30 is a horizontal brace. However, the tension brace 30 is not limited to a horizontal brace, and may be a vertical brace.

[0067] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it is of course possible to implement the present invention in various forms without departing from the gist of the present invention. [Explanation of symbols]

[0068] 10 Frame 20 Gusset plate 30 Tension brace 36 Flange portion (engagement portion) 40 Cylindrical member (holding portion) 42 Hagoita 50 Cushioning material

Claims

1. A pair of gusset plates provided on the frame; a tension brace connected to the pair of gusset plates; A holding portion provided on the gusset plate and configured to slidably hold the tension brace; An engagement portion provided on an end side of the tension brace protruding from the retaining portion and engaged with the retaining portion; A tension brace mounting structure comprising:

2. A cushioning material is provided between the holding portion and the engagement portion.

2. The tension brace mounting structure of claim 1.

3. A shuttlecock is attached to the gusset plate, The retaining portion is a tubular member through which the tension brace passes and which is welded to the shuttlecock. The tension brace mounting structure according to claim 1 or 2.

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