JP6761729B2 - Joint structure - Google Patents

Description

The present invention relates to a joining structure for joining a truss beam to a structural member.

A structure is known in which a truss beam is reinforced by attaching a brace attachment to the lower chord material of the truss beam and fixing a newly installed horizontal brace to a brace fixing plate extending from the brace attachment (for example, Patent Document 1). reference).

As a result, since the horizontal brace can be connected to the truss beam without using welding, it is possible to eliminate the need for installation work and removal work of fire curing as compared with the case of using welding.

JP-A-2009-102877

However, although the above-mentioned Patent Document 1 shows a joint structure that does not use welding, the truss beam is not joined to a structural member to reinforce it.

In view of the above facts, an object of the present invention is to provide a joining structure capable of joining a truss beam to a structural member without using welding.

The joining structure of the first aspect of the present invention is a truss beam having a pair of upper chord members or lower chord members having a gap formed on the facing surface, and is inserted into the gap and protrudes from the upper chord member or the lower chord member. A fixing plate having a protruding portion, a structural member bolted to the protruding portion, and a movement in which the fixing plate is supported by the upper chord member or the lower chord member to suppress the vertical or lateral movement of the fixing plate. It is provided with a restraining member.

That is, the fixing plate inserted in the gap between the upper chord member or the lower chord member is supported by the upper chord member or the lower chord member via the movement suppressing member, and the movement in the vertical direction or the lateral direction is suppressed. Then, the protruding portion of the fixing plate protruding from the upper chord member or the lower chord member is bolted to the structural member, and the truss beam is reinforced by the structural member.

Since the truss beam and the structural member are bolted in this way, the construction period can be shortened as compared with the joining by welding which requires fire curing.

Further, since the truss beam can be fixed to the structural member without making a hole in the upper chord member or the lower chord member, it is possible to suppress a decrease in the strength of the upper chord member or the lower chord member.

In the first aspect of the present invention, the bonding structure of the second aspect of the present invention is such that a contact plate for supporting a vertical member and a diagonal member is inserted and fixed in the gap, and is located on both sides of the contact plate. The U-shaped foot plate of the fixed plate is inserted into the gap in elevation, and the movement suppressing member is formed by a pair of holding plates that hold the lower chord member or the leg plate protruding from the upper chord member together with the contact plate. Is configured.

That is, the leg plates of the U-shaped fixed plate are inserted into the gaps on both sides of the contact plate in elevation view, and the leg plates protruding from the lower chord member or the upper chord member are sandwiched by the pair of holding plates together with the contact plates. As a result, the lateral movement of the fixing plate is restricted, so that the horizontal force acting on the truss beam can be transmitted to the structural member.

Further, the holding plate that holds the leg plate of the fixed plate is caught by the upper chord member or the lower chord member, so that the movement of the fixed plate in the pull-out direction from the gap is restricted. Therefore, the effect of suppressing the detachment of the fixed plate is enhanced. Then, when the fixing plate comes into contact with the contact plate, the movement of the fixing plate in the insertion direction into the gap is restricted.

In the outer wall structure of the third aspect of the present invention, in the second aspect of the present invention, at least one of the fixed plate and the pair of upper chord members or lower chord members, or the holding plate and the contact plate is bonded with an adhesive. Has been done.

That is, by filling the gap between the fixed plate and the upper chord material or the lower chord material, or at least one of the holding plate and the contact plate with an adhesive, it becomes easy to control the dimensions of the contact portion of the member and the gap is generated due to construction error. The caused rattling can be suppressed.

Further, in the structure in which the fixing plate and the holding plate are fixed by bolts, the fixing plate and the holding plate are fixed by the adhesive force of the adhesive to prevent the fixing plate and the holding plate from being pressure-bonded. And the bonding force can be increased.

Since the present invention has the above configuration, the truss beam can be joined to the structural member without using welding.

It is a side view which shows the truss beam which concerns on 1st Embodiment. It is an enlarged view which shows the joint part of the truss beam of 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a B arrow view of FIG.

Hereinafter, the joining structure according to the first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a seismic reinforcement structure in a building having a steel truss structure, and a ramen frame 12 which is a structural member for reinforcing the truss beam 10 is constructed under the truss beam 10. The truss beam 10 is joined to the rigid frame frame 12 at a plurality of locations, and the truss beam 10 is reinforced from below by the rigid frame frame 12.

The truss beam 10 is bridged over a support column 14 erected on the foundation portion 50. The strut 14 is reinforced with a diagonal member 13, and both ends of the upper chord member 18 are joined to the upper part of the strut 14. Further, both ends of the lower chord member 16 arranged in parallel with the upper chord member 18 are joined to the middle portion of the support column 14.

As shown in FIGS. 1 and 2, the lower chord member 16 and the upper chord member 18 are joined at a plurality of positions by a vertical member 20 extending in the vertical direction J from the lower chord member 16 to the upper chord member 18 (FIG. Only one joint is shown in 1 and FIG. 2). Further, the lower chord member 16 and the upper chord member 18 are joined by a diagonal member 22 extending diagonally from the lower chord member 16 to the upper chord member 18, and the lower chord member 16 extends toward one side of the lower chord member 16. At the intersection of 22 and the diagonal member 22 extending toward the other side, the intersecting diagonal members 22 and 22 are connected by a connecting plate 24 (see FIG. 1).

As shown in FIG. 3, the lower chord member 16 is composed of a first lower chord member 26 having an L-shaped cross section and a second lower chord member 28, and is composed of a first piece 26a and a second lower chord member of the first lower chord member 26. The first piece 28a of 28 is arranged so as to face each other. The upper chord member 18 is also configured in the same manner as the lower chord member 16 (not shown).

In the present embodiment, the first lower chord member 26 and the second lower chord member 28 will be described by taking a steel material having an L-shaped cross section as an example, but the present invention is not limited to this, and for example, a steel material having a channel cross section is used. It may be configured.

As shown in FIGS. 1 and 2, a contact plate 30 is arranged at a connection point of the vertical member 20 between the first piece 26a of the first lower chord member 26 and the first piece 28a of the second lower chord member 28. (Only one place is shown). Bolts 32 are inserted into the bolt holes formed in the first pieces 26a and 28a of the lower chord members 26 and 28 and the contact plate 30, and the lower end of the contact plate 30 is connected to the lower chord member by the fastening force of the bolts 32. It is fixed in a state of being sandwiched between the first pieces 26a and 28a of 26 and 28.

As a result, as shown in FIG. 4, the lower chord member 16 is formed between the facing surface 26c of the first piece 26a of the first lower chord member 26 and the facing surface 28c of the first piece 28a of the second lower chord member 28. Gap 34s extending in the material axis direction are formed on both sides of the contact plate 30.

As shown in FIG. 2, the vertical member 20 and the diagonal member 22 are fixed to the contact plate 30 with bolts 32, and a similar contact plate 30 is formed on the upper chord member 18 and the contact plate 30 as shown in FIG. It is also provided at the joint portion between the upper chord member 18 and the support column 14. As a result, the truss beam 10 is formed by bolting the vertical member 20 and the diagonal member 22 with the contact plates 30 at various locations.

The rigid frame frame 12 is made of H-shaped steel, and includes a rigid frame column 12a and a rigid frame beam 12b bridged between the rigid frame columns 12a. As a result, the rigid frame frame 12 is formed in a gate shape arranged along the truss beam 10.

The ramen strut 12a is erected inside the strut 14 of the truss beam 10, and the lower end and the upper end of the ramen strut 12a are fixed to the strut 14 via the coupling plate 12c.

As shown in FIG. 2, a fixing plate 36 is attached to the lower chord member 16 of the truss beam 10. As shown in FIG. 3, the fixing plate 36 is inserted into the gap 34 between the first piece 26a of the first lower chord member 26 and the first piece 28a of the second lower chord member 28 in the mounted state. And a second leg plate 36b is provided. Further, as shown in FIG. 2, the fixing plate 36 has a protruding portion 36c that protrudes downward from the lower chord member 16 when the leg plates 36a and 36b are inserted into the gap 34. As a result, the fixing plate 36 is formed in a U shape in elevation.

The leg plates 36a and 36b of the fixing plate 36 are inserted from below into the gaps 34 formed on both sides of the contact plate 30, and the contact plates 30 are sandwiched by the foot plates 36a and 36b from both sides. Each of the leg plates 36a and 36b is set to have a length dimension in which the tip portion protrudes upward from the lower chord member 16 with the protruding portion 36c in contact with the lower edge of the contact plate 30.

The tip of the first leg plate 36a protruding upward from the lower chord member 16 is sandwiched by the pair of first holding plates 38. The first holding plate 38 is formed in a rectangular shape, and the first holding plate 38 is attached to the first leg plate 36a by the fastening force of the bolt 32 through which the bolt holes of the first holding plate 38 and the first leg plate 36a are inserted. It is fixed. The tip of the first holding plate 38 reaches the contact plate 30, and the first holding plate 38 holds the first leg plate 36a together with the contact plate 30 and moves the fixed plate 36 in the vertical direction J and the lateral direction Y. It constitutes a movement suppressing member that suppresses the movement.

Further, the tip portion of the second leg plate 36b protruding upward from the lower chord member 16 is sandwiched by the pair of second sandwich plates 40. The second holding plate 40 is formed in a long plate shape, and the second holding plate 40 is attached to the second holding plate 36b by the fastening force of the bolt 32 through which the bolt holes of the second holding plate 40 and the second leg plate 36b are inserted. It is fixed. The tip of the second holding plate 40 reaches the contact plate 30, and the second holding plate 40 holds the second leg plate 36b together with the contact plate 30 and moves the fixing plate 36 in the vertical direction J and the lateral direction Y. It constitutes a movement suppressing member that suppresses the movement. The tip of the second holding plate 40 is cut diagonally in order to prevent interference with the diagonal member 22.

On the other hand, as shown in FIGS. 1 and 3, the joint plate 42 is fixed in advance by welding on the upper surface of the rigid frame beam 12b in the rigid frame frame 12 corresponding to the mounting position of the fixing plate 36 in an upright state. .. As shown in FIG. 3, the joint plate 42 is configured to come into surface contact with the protruding portion 36c of the fixing plate 36.

Bolt holes 36d and 42a communicating with each other are provided in the joint plate 42 and the protruding portion 36c, and the screw portion 32a of the bolt 32 is inserted. A nut 32c is fastened to the screw portion 32a, and the protruding portion 36c of the fixing plate 36 is bolted to the joint plate 42 by the fastening force. As a result, as shown in FIG. 1, the truss beam 10 is fixed and reinforced to the rigid frame beam 12b of the rigid frame frame 12 via the fixing plate 36 (only one location is shown).

In the present embodiment, the case where the truss beam 10 is reinforced by the gate-shaped rigid frame frame 12 has been described as an example, but the structure is not limited to this. For example, the truss beam 10 may be reinforced by a beam member extending along the lower chord member 16 of the truss beam 10 and having both ends fixed to the columns 14 of the truss beam 10. In such a structure, since the beam member can be arranged above the upper chord member 18, the upper chord member 18 can be joined to the beam member to reinforce the truss beam 10.

Then, as shown in FIG. 4, in the gap between the first leg plate 36a of the fixing plate 36 and the first pieces 26a and 28a of the first and second lower chord members 26 and 28, the epoxy resin 44 which is an adhesive is used. Is filled. As a result, the first leg plate 36a of the fixing plate 36 and the first and second lower chord members 26 and 28 are joined. Further, although not shown, the adhesive is also applied to the gap between the second leg plate 36b of the fixing plate 36 and the first pieces 26a and 28a of the first and second lower chord members 26 and 28. It is filled with epoxy resin 44. As a result, the second leg plate 36b of the fixing plate 36 and the first and second lower chord members 26 and 28 are joined.

Further, the gap between the first holding plate 38 and the contact plate 30 is also filled with an epoxy resin 44 which is an adhesive, and the first holding plate 38 and the contact plate 30 are joined to each other. Although not shown, similarly to this, the gap between the second holding plate 40 and the contact plate 30 is also filled with the epoxy resin 44 which is an adhesive, and the second holding plate 40 and the contact plate 30 are joined. Has been done.

In FIG. 4, the gaps between the members filled with the epoxy resin 44 and the thickness of the adhesive layer made of the epoxy resin 44 are exaggerated.

The operation of the present embodiment according to the above configuration will be described.
That is, when the truss beam 10 is reinforced by the rigid frame frame 12 constructed under the truss beam 10, it is fixed to the gap 34 between the first lower chord member 26 and the second lower chord member 28 constituting the lower chord member 16 of the truss beam 10. The plate 36 is inserted and attached.

Specifically, the lower chord member 16 is provided with a contact plate 30, and gaps 34 are formed on both sides of the contact plate 30. The fixing plate 36 is formed in a U shape in elevation view, and has a first leg plate 36a and a second leg plate 36b.

The leg plates 36a and 36b of the fixing plate 36 are inserted into the gaps 34 on both sides of the contact plate 30 from below, and the contact plates 30 are sandwiched between the leg plates 36a and 36b of the fixing plate 36 from both sides.

In this state, the first leg plate 36a projecting upward from the lower chord member 16 is sandwiched by the pair of first sandwiching plates 38 together with the contact plate 30 and fixed by the bolt 32. Further, the second leg plate 36b protruding upward from the lower chord member 16 is sandwiched by the pair of second sandwiching plates 40 together with the contact plate 30 and fixed by the bolt 32. As a result, the movement of the fixed plate 36 in the vertical direction J and the horizontal direction Y is suppressed.

At this time, since the protruding portion 36c of the fixing plate 36 protrudes downward from the lower chord member 16, the bolt hole 36d provided in the protruding portion 36c is replaced with the bolt hole 42a of the joint plate 42 standing upright on the ramen beam 12b. To match. Then, the screw portion 32a of the bolt 32 is inserted into both bolt holes 36d and 42a to tighten the nut 32c, and the fixing plate 36 of the truss beam 10 is bolted to the joint plate 42 of the ramen beam 12b by the fastening force. As a result, the truss beam 10 is joined to the rigid frame frame 12 for seismic reinforcement.

In this way, the truss beam 10 and the rigid frame frame 12 which is a structural member can be bolted without using welding. Therefore, the construction period can be shortened as compared with the case where the two are joined by welding requiring fire curing.

Further, since the truss beam 10 can be fixed to the rigid frame frame 12 without making a hole in the lower chord member 16, it is possible to suppress a decrease in the strength of the lower chord member 16.

Further, in the U-shaped fixing plate 36, the leg plates 36a and 36b are inserted into the gaps 34 on both sides of the contact plate 30, and the leg plates 36a and 36b are fixed with the contact plates 30 sandwiched from both sides. As a result, the contact plate 30 prevents the fixing plate 36 from moving in the lateral direction Y, so that the horizontal force acting on the truss beam 10 can be transmitted to the rigid frame frame 12.

Further, the holding plates 38 and 40 holding the leg plates 36a and 36b of the fixing plate 36 are hooked on the upper edges of the first pieces 26a and 28a of the first and second lower chord members 26 and 28, so that the fixing plate 36 The movement in the downward pulling direction from the gap 34 is restricted. As a result, the effect of suppressing the detachment of the fixed plate 36 can be enhanced. Then, when the protruding portion 36c of the fixing plate 36 comes into contact with the contact plate 30, it is possible to prevent the fixing plate 36 from moving upward in the gap 34 insertion direction. As a result, the normal force acting on the truss beam 10 can be transmitted to the rigid frame frame 12.

Then, the gap between the fixing plate 36 and the lower chord member 16 and the gap between the holding plates 38 and 40 and the contact plate 30 can be filled with the epoxy resin 44. This facilitates dimensional control at the contact portion of each member and suppresses rattling caused by the occurrence of gaps due to construction errors.

Further, in the present embodiment in which the fixing plate 36 and the holding plates 38 and 40 are fixed by bolts, the fixing plate 36 and the lower chord member 16 are fixed with the epoxy resin 44 to fix the fixing plate 36 and the holding plates 38 and 40. It is possible to prevent the and the bolt 32 from forming a bearing joint. As a result, the bonding force between the fixing plate 36 and the holding plates 38 and 40 can be increased.

In the present embodiment, the fixing plate 36 and the lower chord member 16 and the holding plates 38 and 40 and the contact plate 30 are bonded with the epoxy resin 44, but the present invention is not limited to this. At least one of the fixing plate 36 and the lower chord member 16 or between the holding plates 38 and 40 and the contact plate 30 may be bonded with the epoxy resin 44. Further, although the epoxy resin 44 is used for adhesion, the present invention is not limited to this, and other adhesives can be used.

Further, in the present embodiment, the fixing plate 36 is arranged so as to sandwich the contact plate 30 from both sides, but the structure is not limited to this, and the fixing plate 36 is inserted and fixed in the gap 34 at another location. You may.

In the present embodiment, the movement of the fixed plate 36 in the vertical direction J and the horizontal direction Y is suppressed, but the present invention is not limited to this. That is, it is sufficient that the movement of the fixed plate 36 in one of the vertical direction J and the lateral direction Y can be suppressed.

10 Truss beam 12 Rahmen frame 12b Rigid frame 16 Lower chord material 18 Upper chord material 20 Vertical material 22 Diagonal material 26 1st lower chord material 28 2nd lower chord material 30 Contact plate 32 Bolt 34 Gap 36 Fixed plate 36a 1st leg plate 36b 2nd leg plate 36c Protruding part 38 1st holding plate 40 2nd holding plate 44 Epoxy resin J Vertical direction Y Horizontal direction

Claims (3)

A truss beam having a pair of upper or lower chord members with gaps formed on the facing surfaces,
A fixed plate that is inserted into the gap and has a protrusion that protrudes from the upper chord member or the lower chord member.
A structural member that is bolted to the protrusion and
A movement suppressing member that supports the fixing plate on the upper chord member or the lower chord member to suppress the vertical or lateral movement of the fixing plate.
Joint structure with. Contact plates that support vertical members and diagonal members are inserted and fixed in the gaps, and U-shaped leg plates of the fixing plates are inserted and fixed in the gaps located on both sides of the contact plates in elevation view. ,
The joining structure according to claim 1, wherein the movement suppressing member is formed by a pair of holding plates that hold the lower chord member or the leg plate protruding from the upper chord member together with the contact plate. The joining structure according to claim 2, wherein at least one of the fixing plate and the pair of upper chord members or lower chord members, or the holding plate and the contact plate is joined with an adhesive.