JP2018071148A - Junction structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction structure capable of joining a truss beam to a structural member without using welding.SOLUTION: This junction structure is provided with: a truss beam that is provided with a pair of lower chords 26, 28 having a gap 34 formed between opposing surfaces 26c, 28c; a fixed plate 36 that has a projected part 36c inserted into the gap 34 to project from a lower chord 16; a structural member that is fixed to the projected part 36c by a bolt; and a movement suppression member that supports the fixed plate 36 on the lower chord 16 to suppress movement of the fixed plate 36 in a vertical direction J or a horizontal direction Y.SELECTED DRAWING: Figure 2

Description

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

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

  Thereby, since a horizontal brace can be connected with a truss beam without using welding, compared with the case where welding is used, the installation work and removal work of a fire curing can be made unnecessary.

JP 2009-102877 A

  However, although the joint structure which does not use welding is shown by the said patent document 1, it does not reinforce by joining a truss beam to a structural member.

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

  The joining structure according to the first aspect of the present invention includes a truss beam including a pair of upper chord members or lower chord members having a gap formed on an opposing surface, and is inserted into the gap and protrudes from the upper chord member or the lower chord member. A fixed plate having a protrusion, a structural member bolted to the protrusion, and a movement for supporting the fixed plate on the upper chord member or the lower chord member to suppress the vertical or horizontal movement of the fixed plate. A restraining member.

  That is, the fixed plate inserted in the gap between the upper chord member and 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 horizontal direction is suppressed. And the protrusion part of the fixing plate which protruded from the upper chord material or the lower chord material is bolt-fixed to the structural member, and the truss beam is reinforced by the structural member.

  Thus, since the truss beam and the structural member are fixed with bolts, the construction period can be shortened as compared with the joining by welding that requires heat curing.

  In addition, 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 strength of the upper chord member or the lower chord member.

  In the joining structure of the second aspect of the present invention, in the first aspect of the present invention, a contact plate that supports the vertical member and the diagonal member is inserted and fixed in the gap, and is located on both sides of the contact plate. In the gap, a leg plate of the U-shaped fixed plate is inserted in an elevational view, and the movement suppressing member is a pair of clamping plates that clamp the leg plate protruding from the lower chord material or the upper chord material together with the contact plate Is configured.

  That is, the leg plate of the U-shaped fixed plate is inserted into the gap on both sides of the contact plate in an elevational view, and the leg plate protruding from the lower chord member or the upper chord member is sandwiched by the pair of sandwich plates together with the contact plate. Thereby, since the movement of the fixing plate in the lateral direction is restricted, the horizontal force acting on the truss beam can be transmitted to the structural member.

  Further, when the clamping plate that clamps the leg plate of the fixed plate is caught by the upper chord material or the lower chord material, the movement of the fixed plate in the direction of coming out from the gap is restricted. For this reason, the separation suppression effect of the fixed plate is enhanced. Then, when the fixed plate comes into contact with the contact plate, the movement of the fixed 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 fixing plate and the pair of upper chord members or lower chord members, or the sandwiching plate and the contact plate is bonded with an adhesive. Has been.

  That is, by filling the gap between at least one of the fixed plate and the upper chord material or the lower chord material, or the sandwiching plate and the contact plate with an adhesive, it becomes easy to manage the size of the contact portion of the member, and the gap due to construction error is generated. The resulting play can be suppressed.

  In addition, in the structure in which the fixing plate and the clamping plate are bolted, the fixing plate and the upper chord material or the lower chord material are fixed by the adhesive force of the adhesive, thereby preventing the fixing plate and the clamping plate from being in support bearing. In addition, 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 junction part of the truss beam of 1st Embodiment. It is the sectional view on the AA line of FIG. FIG. 3 is a view taken in the direction of arrow B in FIG. 2.

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

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

  The truss beam 10 is stretched over a support column 14 erected on the foundation 50. The support column 14 is reinforced with an oblique member 13, and both ends of the upper chord member 18 are joined to the upper portion of the support column 14. Further, both ends of the lower chord member 16 arranged in parallel with the upper chord member 18 are joined to the intermediate 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 toward the upper chord member 18 (see FIG. 1 and FIG. 2). 1 and FIG. 2 show only one joint part). The lower chord material 16 and the upper chord material 18 are joined by an oblique material 22 extending obliquely from the lower chord material 16 toward the upper chord material 18, and an oblique material extending toward the one side from the lower chord material 16. In a portion where the diagonal member 22 extending toward the other side intersects with the diagonal member 22, the intersecting diagonal members 22, 22 are connected by a connecting plate 24 (see FIG. 1).

  As shown in FIG. 3, the lower chord material 16 is composed of a first lower chord material 26 and a second lower chord material 28 having an L-shaped cross section, and the first piece 26 a of the first lower chord material 26 and the second lower chord material 26. It arrange | positions so that 28 1st piece 28a may oppose. The upper chord material 18 is configured in the same manner as the lower chord material 16 (not shown).

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

  Between the first piece 26a of the first lower chord member 26 and the first piece 28a of the second lower chord member 28, as shown in FIGS. (Only one location is shown). Bolts 32 are inserted into the bolt holes formed in the first pieces 26 a, 28 a of the lower chord members 26, 28 and the contact plate 30, and the lower chord material of the lower end portion of the contact plate 30 is formed by the fastening force of the bolts 32. 26 and 28 are fixed in a state of being sandwiched between the first pieces 26a and 28a.

  As a result, as shown in FIG. 4, the lower chord material 16 is positioned between the facing surface 26 c of the first piece 26 a of the first lower chord material 26 and the facing surface 28 c of the first piece 28 a of the second lower chord material 28. A gap 34 extending in the material axis direction is 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 the similar contact plate 30 includes the upper chord member 18, It is also provided at the joint portion between the upper chord member 18 and the column 14. Thus, the truss beam 10 is configured by bolting the vertical member 20 and the diagonal member 22 with the contact plates 30 at various places.

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

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

  As shown in FIG. 2, a fixed 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 a 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 attached state. And a second leg plate 36b. Further, as shown in FIG. 2, the fixed plate 36 has a protruding portion 36 c that protrudes downward from the lower chord material 16 in a state where the leg plates 36 a and 36 b are inserted into the gap 34. Thereby, the fixed plate 36 is formed in a U shape in an elevational view.

  The leg plates 36a and 36b of the fixed plate 36 are inserted from below into a gap 34 formed on both sides of the contact plate 30, and the contact plate 30 is sandwiched from both sides by the leg plates 36a and 36b. Each of the leg plates 36 a and 36 b is set to have a length that protrudes upward from the lower chord material 16 with the protruding portion 36 c in contact with the lower edge of the contact plate 30.

  The front end portion of the first leg plate 36a protruding upward from the lower chord member 16 is clamped by a pair of first clamping plates 38. The first clamping plate 38 is formed in a rectangular shape, and the first clamping plate 38 is attached to the first leg plate 36a by the fastening force of the bolts 32 inserted through the bolt holes of the first clamping plate 38 and the first leg plate 36a. It is fixed. The tip of the first clamping plate 38 reaches the contact plate 30, and the first clamping plate 38 clamps the first leg plate 36 a together with the contact plate 30, and moves the fixed plate 36 in the vertical direction J and lateral direction Y. The movement suppression member which suppresses is comprised.

  Further, the tip end portion of the second leg plate 36b protruding upward from the lower chord member 16 is clamped by a pair of second clamping plates 40. The second clamping plate 40 is formed in a long plate shape, and the second clamping plate 40 is attached to the second leg plate 36b by the fastening force of the bolt 32 inserted through the bolt holes of the second clamping plate 40 and the second leg plate 36b. It is fixed. The tip of the second clamping plate 40 reaches the contact plate 30, and the second clamping plate 40 clamps the second leg plate 36 b together with the contact plate 30, and moves the fixed plate 36 in the vertical direction J and the horizontal direction Y. The movement suppression member which suppresses is comprised. And the front-end | tip of the 2nd clamping board 40 is cut diagonally in order to prevent interference with the diagonal 22.

  On the other hand, as shown in FIGS. 1 and 3, the upper surface of the rigid frame beam 12 b in the rigid frame 12 corresponding to the mounting position of the fixing plate 36 is fixed in advance by welding in a state where the joining plate 42 is erected. . As shown in FIG. 3, the joining plate 42 is configured to be in surface contact with the protruding portion 36 c of the fixed plate 36.

  Bolt holes 36d and 42a communicating with each other are provided in the joining 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 joining plate 42 by the fastening force. Thereby, as shown in FIG. 1, the truss beam 10 is fixed and reinforced by the rigid frame 12 b of the rigid frame 12 via the fixing plate 36 (only one portion is shown).

  In the present embodiment, the case where the truss beam 10 is reinforced by the portal ramen frame 12 has been described as an example. However, the present invention is not limited to this structure. For example, the truss beam 10 may be reinforced by a beam member that extends along the lower chord 16 of the truss beam 10 and whose both ends are fixed to the columns 14 of the truss beam 10. In such a structure, since the beam member can be disposed on the upper chord member 18, the truss beam 10 can be reinforced by joining the upper chord member 18 to the beam member.

  As shown in FIG. 4, an epoxy resin 44, which is an adhesive, is formed in the gap between the first leg plate 36a of the fixing plate 36 and the first pieces 26a, 28a of the first and second lower chord members 26, 28. Is filled. Thereby, the first leg plate 36a of the fixed plate 36 and the first and second lower chord members 26, 28 are joined. In addition, although not shown in the figure, an adhesive is also provided in the gap between the second leg plate 36b of the fixing plate 36 and the first pieces 26a, 28a of the first and second lower chord members 26, 28. The epoxy resin 44 is filled. Thereby, the second leg plate 36b of the fixed plate 36 and the first and second lower chord members 26, 28 are joined.

  The gap between the first sandwiching plate 38 and the contact plate 30 is also filled with an epoxy resin 44 that is an adhesive, and the first sandwiching plate 38 and the contact plate 30 are joined. Although not shown, similarly, the gap between the second sandwiching plate 40 and the contact plate 30 is filled with an epoxy resin 44 as an adhesive, and the second sandwiching plate 40 and the contact plate 30 are joined together. Has been.

  In FIG. 4, the gap 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 effect | action of this embodiment which concerns on the above structure is demonstrated.
That is, when the truss beam 10 is reinforced by the frame 12 constructed below, the truss beam 10 is fixed to the gap 34 between the first lower chord member 26 and the second lower chord member 28 that constitute the lower chord member 16 of the truss beam 10. Insert plate 36 and insert.

  More specifically, the lower chord member 16 is provided with a contact plate 30, and a gap 34 is formed on both sides of the contact plate 30. The fixed plate 36 is formed in a U shape in an elevational view, and includes a first leg plate 36a and a second leg plate 36b.

  The leg plates 36a and 36b of the fixed plate 36 are inserted into the gap 34 on both sides of the contact plate 30 from below, so that the contact plate 30 is sandwiched from both sides by the leg plates 36a and 36b of the fixed plate 36.

  In this state, the first leg plate 36 a protruding upward from the lower chord member 16 is clamped by the pair of first clamping plates 38 together with the contact plate 30 and fixed by the bolt 32. Further, the second leg plate 36 b protruding upward from the lower chord member 16 is clamped by the pair of second clamping plates 40 together with the contact plate 30 and fixed by the bolt 32. Thereby, 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 used as the bolt hole 42a of the joining plate 42 that stands on the ramen beam 12b. To match. Then, the screw portion 32a of the bolt 32 is inserted into both the bolt holes 36d and 42a and the nut 32c is tightened, and the fixing plate 36 of the truss beam 10 is fixed to the joint plate 42 of the rigid frame beam 12b by the fastening force. Thereby, the truss beam 10 is joined to the ramen frame 12, and seismic reinforcement is performed.

  In this way, the truss beam 10 and the rigid frame 12 that is a structural member can be bolted without using welding. For this reason, a work period can be shortened compared with the case where both are joined by welding which requires a heat curing.

  In addition, since the truss beam 10 can be fixed to the ramen frame 12 without making a hole in the lower chord member 16, a decrease in strength of the lower chord member 16 can be suppressed.

  Further, the U-shaped fixing plate 36 has leg plates 36a and 36b inserted into the gap 34 on both sides of the contact plate 30, and the leg plates 36a and 36b are fixed with the contact plate 30 sandwiched from both sides. As a result, the movement of the fixed plate 36 in the lateral direction Y is blocked by the contact plate 30, so that the horizontal force acting on the truss beam 10 can be transmitted to the 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 Movement in the downward direction from the gap 34 is restricted. As a result, the effect of suppressing the separation of the fixed plate 36 can be enhanced. The protrusion 36 c of the fixed plate 36 abuts on the contact plate 30, thereby preventing the movement of the fixed plate 36 in the insertion direction of the gap 34 upward. Thereby, the normal force acting on the truss beam 10 can be transmitted to the frame frame 12.

  The gap between the fixed 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. As a result, dimensional management at the contact portion of each member is facilitated, and rattling due to the occurrence of a gap due to construction errors can be suppressed.

  In the present embodiment in which the fixing plate 36 and the clamping plates 38 and 40 are bolted, the fixing plate 36 and the clamping plates 38 and 40 are fixed by fixing the fixing plate 36 and the lower chord material 16 with the epoxy resin 44. Can be suppressed by the bolt 32. Thereby, the joining force of the fixing plate 36 and the clamping plates 38 and 40 can be increased.

  In the present embodiment, the fixing plate 36 and the lower chord member 16 and the sandwiching 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 sandwiching plates 38 and 40 and the contact plate 30 may be bonded with an epoxy resin 44. Moreover, although the epoxy resin 44 was used for adhesion, it is not limited to this, and other adhesives can be used.

  In this embodiment, the fixing plate 36 is disposed so as to sandwich the contact plate 30 from both sides. However, the present invention is not limited to this structure, and the fixing plate 36 is inserted and fixed in the gap 34 at another location. May be.

  And in this embodiment, although the movement of the up-down direction J and the horizontal direction Y of the fixed plate 36 was suppressed, it is not limited to this. That is, it is only necessary to suppress movement in one direction of the fixed plate 36 in the vertical direction J or the horizontal direction Y.

DESCRIPTION OF SYMBOLS 10 Truss beam 12 Ramen frame 12b Rahmen beam 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 Crevice 36 Fixed plate 36a 1st leg plate 36b 2nd leg plate 36c Protruding portion 38 First clamping plate 40 Second clamping plate 44 Epoxy resin J Vertical direction Y Horizontal direction

Claims (3)

A truss beam provided with a pair of upper chord material or lower chord material with a gap formed on the opposing surface;
A fixed plate inserted into the gap and having a protruding portion protruding from the upper chord member or the lower chord member;
A structural member bolted to the protruding portion;
A movement suppressing member for supporting the fixed plate on the upper chord member or the lower chord member to suppress the vertical or lateral movement of the fixed plate;
Bonding structure with. A contact plate for supporting a vertical member and a diagonal member is inserted and fixed in the gap, and a leg plate of the U-shaped fixing plate is inserted in the gap located on both sides of the contact plate in an elevational view. ,
The joining structure according to claim 1, wherein the movement suppressing member is configured by a pair of sandwiching plates that sandwich the leg plate protruding from the lower chord member or 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 sandwiching plate and the contact plate is joined with an adhesive.