JP2012127165A - Structure for joining steel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively apply bearing pressure by reducing initial sliding, while securing an absorption margin of error during construction.SOLUTION: Clearances between a bolt 80A and a first small hole 112A, the bolt 80A and a first small hole 212A, a bolt 80B and a second small hole 122B, and the bolt 80B and a second small hole 222B are set small, so that initial sliding is reduced to enable effective application of bearing pressure; while an absorption margin of error during construction is secured by enlarging clearances between the bolt 80A and a second large hole 124A, the bolt 80A and a second large hole 224A, the bolt 80B and a first large hole 114B, and the bolt 80B and a first large hole 214B.

Description

  The present invention relates to a joining structure of steel materials.

  In joining steel material ends in a structure constructed using steel materials, the accessory plates are disposed on both sides of the ends of the two steel materials to be joined, and the steel material ends and the accessory plates are bolted. There is known a joining structure that is fastened by the above.

  In Patent Document 1, a pair of members to be joined and a supporting plate are fastened with a high-strength bolt, and a washer member presses a supporting pressure portion of the supporting plate. When pressed against the hole surface, the high-strength bolt and the pair of high-strength bolts are paired so that the load acting on the member to be joined is transmitted through the washer member and the supporting-pressure portion of the accessory plate simultaneously with the tightening of the high-strength bolt. There has been proposed a high-strength bolt joint structure in which members to be joined can be connected to join the members to be joined (see Patent Document 1).

  Here, the support bearing is a joining method in which a force in a direction perpendicular to the axial direction of the bolt is joined by a force generated on a bearing surface of the bolt inserted into the bearing hole by joining with a bolt. . In such a bearing connection, the bearing resistance is not exhibited during the initial slip. Therefore, it is conceivable to reduce the initial slip by reducing the clearance between the bearing hole and the bolt. However, if the clearance between the bearing hole and the bolt is reduced, it becomes difficult to absorb errors during construction, resulting in a reduction in construction efficiency.

JP 2010-53956 A

  Therefore, it is desired to effectively apply the bearing pressure by reducing the initial slip while securing the allowance for error during construction.

  In view of the above, it is an object of the present invention to provide a steel material joining structure capable of effectively applying a bearing pressure by reducing initial slip while securing an allowance for error during construction. .

  Invention of Claim 1 is the joining structure of the steel materials which joins one steel material and the other steel material by pinching with the attachment plate from both sides of the end part of a plurality of steel materials, and joining the one steel material, Said one steel material A bolt hole into which the bolt is inserted is formed at the end of the steel plate and the end of the other steel material, the accessory plate is composed of a first plate and a second plate, and the first plate A first small hole formed between one end of the steel member and the other end of the other steel member from the both sides and inserted with the bolt on one side is formed on the other steel member side. A first large hole configured such that a clearance between the bolt on the other side and a bolt on the other side is larger than a clearance between the bolt on the side and the first small hole, and the bolt on the other side is inserted. The two plates are disposed outside the first plate and formed on the other steel material side. A second small hole that is smaller than the first large hole into which the bolt on the other side is inserted, and a second large hole that is formed on the one steel material side and is larger than the first small hole into which the bolt on the one side is inserted And inserting the bolt into the first small hole, the first large hole, the second small hole, the second large hole, and the bolt hole, and one steel material and the other steel material, Bonding structure of steel materials joined together.

  In invention of Claim 1, while being able to shift a 1st board and a 2nd board for the clearance of a volt | bolt, a 1st large hole, and a 2nd large hole, one steel materials joined and the other steel material Can be shifted. That is, the clearance between the bolt and the first large hole and the second large hole becomes an absorption margin for errors during construction.

  On the other hand, by reducing the clearance between the bolt and the first small hole and the second small hole and the clearance between the bolt and the bolt hole, the initial slip can be reduced and the bearing pressure can be effectively applied.

  Therefore, with the clearance between the bolt and the first large hole and the second large hole, the clearance between the bolt and the first small hole and the second small hole and the bolt and the bolt hole are secured while securing the allowance for error during construction. By reducing the clearance, the initial slip can be reduced and the bearing pressure can be effectively applied.

  Invention of Claim 2 is the joining structure of the steel materials which joins one steel material and the other steel material by pinching | pinching with the bolt from both sides of the edge part of several steel materials, Comprising: Said one steel material A bolt hole into which the bolt is inserted, and an end of the one steel material and an end of the other steel material. A pin hole into which a pin is inserted is formed, and the accessory plate includes a first plate and a second plate, and the first plate has both ends of the one steel material and the other steel material on both sides. Between the first small hole formed on the one steel material side and the one side pin inserted therein, and the clearance formed between the one side pin and the first small hole formed on the other steel material side. It is configured so that the clearance with the pin on the side is large, and the pin on the other side is inserted The second plate is disposed outside the first plate, is formed on the other steel material side, and the pin on the other side is inserted into the second plate. The bolt hole formed in the accessory plate, having a small second small hole, and a second large hole formed on the one steel material side and into which the pin on the one side is inserted and larger than the first hole. And the bolt are set so that the clearance between the first small hole and the pin on one side and the clearance between the second small hole and the pin on the other side are larger than each other. While inserting the pin into the hole, the first large hole, the second small hole, the second large hole, and the pin hole, the bolt is inserted into the bolt hole, and one steel material and the other steel material Bonding structure of steel materials joined together.

  In the invention of claim 2, the first plate and the second plate can be shifted and joined according to the clearance between the bolt and the bolt hole and the clearance between the pin and the first large hole and the second large hole. One steel material and the other steel material can be shifted. That is, there is an absorption margin for errors during construction according to the clearance between the bolt and the bolt hole and the clearance between the pin and the first large hole and the second large hole.

  On the other hand, by reducing the clearance between the pin and the first small hole and the second small hole and the clearance between the bolt and the bolt hole, the initial slip can be reduced and the bearing pressure can be effectively applied.

  Therefore, the initial slip is reduced and the bearing pressure is reduced by reducing the clearance between the pin and the first small hole and the second small hole and the clearance between the bolt and the bolt hole while securing the allowance for error during construction. Can be effectively applied.

  In a third aspect of the present invention, a low-rigidity layer made of a material having lower rigidity than the first plate and the second plate is provided between the first plate and the second plate.

  In the invention of claim 3, by forming a low rigidity layer between the first plate and the second plate constituting the accessory plate, the surface pressure between the end portion of the steel material and the accessory plate is reduced, The area where the surface pressure is generated becomes wider. As a result, the frictional resistance between the end portion of the steel material and the accessory plate is improved, and as a result, the proof stress fluctuation at the initial sliding between the end portion of the steel material and the accessory plate is suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, initial pressure can be made small and the bearing pressure can be provided effectively, ensuring the absorption margin of the error at the time of construction.

It is a perspective view which shows the joining site | part of the edge parts of the steel beam joined by applying the joining structure of the steel materials which concerns on 1st embodiment of this invention. It is a perspective view which shows the joining site | part of the flanges of the edge part of the steel beam joined by applying the joining structure of the steel materials which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view which shows the joining site | part of the flanges of the edge part of the steel beam joined by applying the joining structure of the steel materials which concerns on 1st embodiment of this invention. FIG. 3A is an explanatory diagram for explaining the supporting pressure, and FIG. 3B is an explanatory diagram for explaining the frictional force. (A) is a graph explaining the load deformation relationship in the explanatory diagram of FIG. 3, (B) is an explanatory diagram for explaining the frictional force between the first plate and the second plate. It is a longitudinal cross-sectional view which shows a modification. It is a perspective view which shows the joining site | part of the flanges of the edge part of the steel beam joined by applying the joining structure of the steel materials which concern on 2nd embodiment of this invention. It is a longitudinal cross-sectional view which shows the joining site | part of the flanges of the edge part of the steel beam joined by applying the joining structure of the steel materials which concern on 2nd embodiment of this invention.

[First embodiment]
The joining of the end portions of the steel beam to which the steel joining structure according to the first embodiment of the present invention is applied will be described with reference to FIGS. In each figure, the longitudinal direction of the steel beam is the X direction, and the vertical direction is the Z direction. A direction perpendicular to the X direction and the Z direction is defined as a Y direction.

<Overall structure of joint part between ends of steel beam>
First, the whole structure of the joining part where the steel beams joined by the joining structure of steel materials according to the present invention are joined will be described.

  As shown in FIG. 1, an end portion 10AT of a steel beam 10A as an example of a steel material and an end portion 10BT of a steel beam 10B as an example of a steel material are joined to each other via an accessory plate 100, 200, 300. . Hereinafter, when it is not necessary to distinguish between the steel beam 10A and the steel beam 10B, A and B may be omitted. In addition, when other members and parts are provided on the steel beam 10A side, A is added after the reference numeral, and when they are provided on the steel beam 10B side, B is added after the reference numeral. .

  In this embodiment, the steel beam 10 is an H-shaped steel composed of flanges 12 and 14 and a web 16. The accessory plates 100 and 200 are disposed on both side surfaces of the flanges 12A and 14B of the steel beam 10A, and the accessory plates 100 and 200 are disposed on both side surfaces of the flanges 12B and 14B of the steel beam 10B. That is, the accessory plates 100 and 200 are disposed across the end portion 10AT of the steel beam 10A and the end portion 10BT of the steel beam 10B. Further, the accessory plate 300 is disposed on both side surfaces of the web 16 of the steel beam 10.

  Then, the end portion 10AT of the steel beam 10A and the end portion 10BT of the steel beam 10B are joined by fastening between the accessory plates 100, 200 and the accessory plate 300 with bolts 80 and nuts 82, respectively. In the present embodiment, the hot-dip galvanized bolt 80 is used, and a high-strength bolt joint (high-strength bolt friction joint) is used.

  In this embodiment, the parts clamped by the bolts 100, 200, 300 and bolted are the joined part of the flange 12, the joined part of the flange 14, and the joined part of the web 16 at the end 10 </ b> T of the steel beam 10. There are three junction sites. And the joining part of the flange 12 and the joining part of the flange 14 in the edge part 10T of the steel beam 10 are joining parts to which this invention was applied. Moreover, in the following description, the joining site | part of the flange 12 in the edge part 10T of the steel beam 10 is demonstrated on behalf of.

<Connection structure between ends of steel beam>
Next, the joining structure of the joining portion of the flange 12 of the end portion 10T of the steel beam 10 joined by the steel joining structure of the present invention will be described.

  As shown in FIGS. 1 to 3, the accessory plate 100 has a configuration in which a first plate 110 and a second plate 120 are stacked. Similarly, the accessory plate 200 has a configuration in which a first plate 210 and a second plate 220 are stacked. Further, a first plate 110 constituting the accessory plate 100 and a first plate 210 constituting the accessory plate 200 are arranged on the end 10T side of the steel beam 10, and the second plate 120, 220 is arranged. In this embodiment, a washer 83 is sandwiched and fastened between the bolt 80 and the nut 82 and the accessory plate 100 (first plate 110) and accessory plate 200 (first plate 210).

  In the present embodiment, the contact surface of the end portion 10T of the steel beam 10 with the accessory plates 100 and 200, the contact surface of the first plate 110 and the second plate 120, the first plate 210 and the second plate 220, Each of the contact surfaces is subjected to surface treatment (red rust treatment or blast treatment) for friction bonding and is roughened.

  As shown in FIGS. 2 and 3, bolt holes 13A and 13B into which bolts 80A and 80B are inserted are formed in the flanges 12A and 12B of the steel beams 10A and 10B. As described above, the accessory plates 100 and 200 include the second plates 120 and 220 that form a pair with the first plates 110 and 210 that form a pair. And the bolt hole in which the volt | bolt formed in each of the 1st board 110,210 and the 2nd board 120,220 is inserted differs in a magnitude | size.

  First small holes 112A and 212A having a diameter into which bolts 80A can be inserted are formed on the steel beam 10A side of the first plates 110 and 210, and the first small holes 112A and 212A are formed on the steel beam 10B side. First large holes 114B and 214B having large diameters are formed.

  Bolts 80B can be inserted on the steel beam 10B side of the second plates 120, 220 disposed outside the first plates 110, 210, and the second small holes 122B, 222B having a diameter smaller than that of the first large holes 114B, 214B. The second large holes 124A and 224A having a diameter larger than the first small holes 112A and 212A and the two small holes 122B and 222B are formed on the steel beam 10A side.

  And the bolt hole 13A of the flange 12A of the steel beam 10A, the first small holes 112A and 212A of the first plates 110 and 210 constituting the accessory plates 100 and 200, and the second large holes 124A and 224A of the second plates 120 and 220, respectively. The bolt 80A is inserted into the bolt hole 13B of the flange 12B of the steel beam 10B, the first large holes 114B and 214B of the first plates 110 and 210, and the second small holes 122B and 222B of the second plates 120 and 220. Inserted and bolted.

  In the present embodiment, the bolt holes formed in the accessory plate 300 disposed on both sides of the web 16 of the steel beam 10 are any of the first large holes 114B and 214B and the second large holes 124A and 224A. The diameter is larger than the diameter.

<Action and effect>
Next, functions and effects of the present embodiment will be described.

  As shown in FIG. 3, with respect to the bolt 80A inserted into the bolt hole 13A of the steel beam 10A, the second plates 120 and 220 constituting the attachment plates 100 and 200 are replaced with the bolt 80A and the second large holes 124A and 224A. It can move by the clearance. Further, the first plates 110 and 210 constituting the accessory plates 100 and 200 are moved by the clearance between the bolt 80B and the first large holes 114B and 214B with respect to the bolt 80B inserted into the bolt hole 13B of the steel beam 10B. be able to.

  Therefore, the clearance between the bolts 80A, 80B and the first large holes 114B, 214B and the second large holes 124A, 224A can be shifted and the first plates 110, 210 and the second plates 120, 220 can be joined together. The steel beam 10A and the steel beam 10B can be shifted. That is, the clearance between the bolts 80A, 80B and the first large holes 114B, 214B and the second large holes 124A, 224A becomes an absorption margin for errors during construction.

  Further, as shown in FIG. 4A, the bolt 80A inserted into the steel beam 10A due to the initial sliding between the steel beam 10A and the accessory plates 100, 200 causes the first small holes 112A, When the clearance with 212A is eliminated, the support pressure of the first plates 110 and 210 is received. Similarly, the bolt 80B inserted into the steel beam 10B receives the support pressure of the second plates 120 and 220 when the clearance between the second plates 120 and 220 and the second small holes 122B and 222B is eliminated.

  Therefore, by reducing the clearances between the bolts 80A, 80B and the first small holes 112A, 212A and the second small holes 122B, 222B, it is possible to reduce the initial slip and effectively apply the support pressure (support resistance). Pb).

  Accordingly, the bolts 80A, 80B, 80A, 80B, the first large holes 114B, 214B, and the second large holes 124A, 224A are increased in clearance while securing a margin for absorbing errors during construction. By reducing the clearance between 80B and the first small holes 112A and 212A and the second small holes 122B and 222B, the initial slip can be reduced and the bearing pressure can be effectively applied.

  If it demonstrates from another viewpoint, conventionally, the bearing resistance and construction error absorption were made to function by one bolt hole. On the other hand, in the present embodiment, the first small holes 112A and 212A and the second small holes 122B and 222B function as bearing resistance resistance holes, and the first large holes 114B and 214B and the second large holes 124A, 224A functions as a hole for absorbing construction errors. In other words, the function is separated.

  In order to effectively apply the bearing pressure in this way, the clearance between the plurality of first small holes 112A and 212A and the second small holes 122B and 222B and the plurality of bolts 80A and 80B as in the present embodiment is provided. Even if it is small, it can be assembled easily. If it demonstrates from another viewpoint, even if it forms the some 1st small hole 112A, 212A and the 2nd small hole 122B, 222B with high precision in the 1st board 110,210, respectively, it can assemble easily.

  As shown in FIG. 4B, the force acting on the end portion 10T of the steel beam 10 is also transmitted to the end portion 10T of the steel beam 10 by frictional force via the accessory plates 100 and 200 (friction). Resistance Pf).

  Therefore, as shown in FIG. 5A, by applying both the bearing resistance Pb (supporting pressure) and the frictional resistance Pf (friction force) between the accessory plates 100 and 200 and the steel beam 10, As compared with the configuration in which either one of the forces is applied, the proof stress is improved.

  As shown in FIG. 5B, a frictional resistance Pc is generated between the first plates 110 and 210 and the second plates 120 and 220 constituting the accessory plates 100 and 200. The first plates 110 and 210 and the second plates 120 and 220 are integrated by the frictional resistance Pc.

  In order to minimize the initial slip as much as possible, it is desirable to make the clearances between the bolts 80A and 80B, the first small holes 112A and 212A, and the second small holes 122B and 222B as small as possible. Therefore, it is desirable to set the diameters of the first small holes 112A and 212A and the second small holes 122B and 222B to slightly larger diameters than the outer diameters of the bolts 80A and 80B.

  The diameter of the bolt hole 13 formed in the flange 12 of the steel beam 10 is not particularly limited. From the viewpoint of reducing the initial slip, the first small holes 112A and 212A and the second small holes 122B and 222B Similarly, it is desirable to make the diameter as small as possible.

  The first small hole 112A of the first plate 110 of the accessory plate 100, the second small hole 122B of the second plate 120, the first small hole 212A of the first plate 210 of the accessory plate 200, and the second of the second plate 220. The diameters of the small holes 222B may be different from each other. Similarly, the first large hole 114B of the first plate 110 of the accessory plate 100, the second large hole 124A of the second plate 120, the first large hole 214B of the first plate 210 of the accessory plate 200, the first large hole 214B of the second plate 220. The diameters of the two large holes 224A may be different from each other. Moreover, each bolt hole 13 of the steel beam 10 may have a different diameter.

<Modification>
Next, a modification of this embodiment can be described.

  As shown in FIG. 6, the first plates 110 and 210, which are made of a material having lower rigidity than the first plates 110 and 210 and the second plates 120 and 220 constituting the accessory plates 100 and 200, are formed. And the second plate 120, 220. In the present embodiment, the low-rigidity layer 150 is configured by a rubber plate. That is, the bolts are fastened with the rubber plate (low-rigidity layer 150) sandwiched between the first plates 110 and 210 and the second plates 120 and 220.

  Here, it is known that the frictional resistance is larger when the surface pressure is generated in a wide range and a low pressure than in a narrow range and a high pressure.

  Therefore, the flange 12 of the steel beam 10 is provided by providing the low rigidity layer 150 between the first plates 110 and 210 and the second plates 120 and 220 constituting the accessory plates 100 and 200 as in this modification. While the surface pressure between the accessory plates 100 and 200 decreases, the region where the surface pressure is generated becomes wider.

  An arrow E1 in FIG. 6 indicates a surface pressure when the low-rigidity layer 150 is not provided, and an arrow E2 indicates a surface pressure when the low-rigidity layer 150 is provided. The arrows E1 and E2 are for explaining the magnitude and range of the surface pressure, and do not accurately represent the actual magnitude and range of the surface pressure.

  Thus, by increasing the area where the surface pressure is generated, the frictional resistance between the end portion 10T of the steel beam 10 and the plates 100 and 300 is improved. As a result, the end portion 10T of the steel beam 10 and the plate plate are increased. It is possible to suppress proof stress fluctuation during initial sliding with 100 and 200.

  The low rigidity layer 150 is not limited to a rubber plate. For example, it may be a gel-like plate (for example, an earthquake-resistant gel mat). Alternatively, it may be a metal sprayed layer formed by spraying a metal whose strength (hardness) is smaller than that of the second plates 120 and 220.

[Second Embodiment]
The joining of the ends of steel beams to which the steel joining structure according to the second embodiment of the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment. In addition, as in the first embodiment, the portion clamped by the fastening plate 100 to which the present invention is applied and bolted is the joining portion of the flange 12 at the end portion 10T of the steel beam 10 and the joining of the flange 14. There is a joint part of the part. In the following description, the joining portion of the flange 12 at the end portion 10T of the steel beam 10 will be described as a representative.

<Connection structure between ends of steel beam>
Next, the joining structure of the flange 12 of the end portion 10T of the steel beams 10 and 20 joined by the joining structure of steel materials according to the second embodiment of the present invention will be described.

  As shown in FIGS. 7 and 8, the accessory plate 300 has a configuration in which a first plate 310 and a second plate 320 are stacked. Similarly, the accessory plate 400 has a configuration in which a first plate 410 and a second plate 420 are stacked. The first plate 310 constituting the accessory plate 300 and the first plate 310 constituting the accessory plate 400 are disposed on the end 10T side of the steel beam 10, and the second plate 320, 420 is arranged.

  In the present embodiment, the contact surface of the end portion 10T of the steel beam 10 with the accessory plates 200 and 300, the contact surface of the first plate 310 and the second plate 320, the first plate 410 and the second plate 420, Surface treatment (red rust treatment or blast treatment) for friction bonding is performed on each contact surface.

  A bolt hole 15 into which a bolt 80 is inserted is formed in the flange 12 of the steel beam 10. Further, a pin hole 17 into which a cylindrical shear pin (shear pin) 500 is inserted is formed in the flange 12 of the end portion 10T of the steel beam 10. As described above, the accessory plates 300 and 400 include the first plates 310 and 410 that make a pair and the second plates 320 and 420 that make a pair. Bolt holes 313, 323, 413, and 423 into which the bolts 80 are inserted are formed in the first plates 310 and 410 and the second plates 320 and 420, respectively.

  The first plates 310 and 410 have first small holes 312A and 412A having a diameter into which the bolt 500A can be inserted on the steel beam 10A side, and the steel plates 10B side have the first small holes 312A and 412A. First large holes 314B and 414B having large diameters are formed.

  A second small hole 322B, 422B having a diameter smaller than that of the first large hole 314B, 414B can be inserted on the steel beam 10B side of the second plate 320, 420 disposed outside the first plate 310, 410. The second large holes 324B and 424B having a diameter larger than the first small holes 312A and 412A and the second small holes 322B and 422B are formed on the steel beam 10A side.

  The pin hole 17A of the flange 12A of the steel beam 10A, the first small holes 312A and 412A of the first plates 310 and 410 constituting the accessory plates 300 and 400, and the second large holes 324A and 424A of the second plates 320 and 420 are shear pins. 500A is inserted, and the shear pin 500B is inserted into the pin hole 17B of the flange 12B of the steel beam 10B, the first large holes 314B and 414B of the first plates 310 and 410, and the second small holes 322B and 422B of the second plates 320 and 420. Has been inserted.

  Then, the bolt 80 is inserted into the bolt hole 15 of the flange 12 of the steel beam 10, the bolt holes 313 and 413 of the first plates 310 and 410 that constitute the accessory plates 300 and 400, and the bolt holes 323 and 423 of the second plates 320 and 420. Inserted and bolted.

  In addition, in the bolt hole 15 of the flange 12 of the steel beam 10, the bolt holes 313 and 413 of the first plates 310 and 410 constituting the accessory plates 300 and 400, and the bolt holes 323 and 423 of the second plates 320 and 420, respectively. The clearance between the bolts 80 is the clearance between the first small holes 312A and 412A of the first plates 310 and 410 constituting the accessory plates 300 and 400, the second small holes 322B and 422B of the second plates 320 and 420, and the shear pin 500. It is set to be larger than.

  Furthermore, in this embodiment, the clearance between each bolt hole 15, 313, 413, 323, and 423 and the bolt 80 is the first large hole 314 </ b> B, 414 </ b> B of the first plate 310, 410 that constitutes the accessory plate 300, 400. The clearance is set to be larger than the clearance between the second large holes 324A and 424A of the second plates 320 and 420 and the shear pin 500.

  Further, a drop prevention means is provided so that the shear pin 500 does not fall off. Any drop prevention means may be used. For example, the shear pin 500 may protrude from the second plates 320 and 420, and a pin or a cap may be provided at the protruding portion. Or you may provide the outer side board (illustration omitted) which plugs up a pin hole in the further outer side of the 2nd board 320,340.

<Action and effect>
Next, functions and effects of the present embodiment will be described.

  Similar to the first embodiment, with respect to the shear pin 500A inserted into the pin hole 17A of the steel beam 10A, the second plates 320 and 420 constituting the attachment plates 300 and 400 are replaced with the shear pin 500A and the second large holes 324A and 424A. It can move by the clearance. Further, the first plates 310 and 410 constituting the attachment plates 300 and 400 are moved by the clearance between the shear pin 500B and the first large holes 314B and 414B with respect to the shear pin 500B inserted into the pin hole 17B of the steel beam 10B. be able to.

  Therefore, the first plate 310, 410 and the second plate 320, 420 can be shifted and joined by the clearance between the shear pins 500A, 500B and the first large holes 314B, 414B and the second large holes 324A, 424A. The steel beam 10A and the steel beam 10B can be shifted. That is, the clearance between the shear pins 500A and 500B and the first large holes 314B and 414B and the second large holes 324A and 424A becomes an absorption margin for errors during construction.

  Further, when the clearance between the first pin 310, 410 and the first small holes 312A, 412A of the shear pin 500A inserted into the steel beam 10A is eliminated due to the initial sliding between the steel beam 10A and the accessory plates 300, 400, the first pin 310A is removed. The bearing pressure of the one plate 310,410 is received. Similarly, the shear pin 500B inserted into the steel beam 10B receives the support pressure of the second plates 320 and 420 when the clearance between the second plates 320 and 420 and the second small holes 322B and 422B is eliminated.

  Therefore, by reducing the clearance between the shear pins 500A and 500B, the first small holes 312A and 412A, and the second small holes 322B and 422B, the initial slip can be reduced and the bearing pressure can be effectively applied.

  Accordingly, by increasing the clearance between the shear pins 500A and 500B and the first large holes 314B and 414B and the second large holes 324A and 424A, the shear pin 500A, 500B and the first small holes are secured while securing an allowance for error during construction. By reducing the clearances between the holes 312A and 412A and the second small holes 322B and 422B, the initial slip can be reduced and the bearing pressure can be effectively applied (bearing resistance Pb).

  If it demonstrates from another viewpoint, conventionally, bearing resistance and construction error absorption were made to function by one pin hole. On the other hand, in this embodiment, the first small holes 312A and 3412A and the second small holes 322B and 422B function as bearing resistance resistance holes, and the first large holes 314B and 414B and the second large holes 324A, 424A functions as a hole for absorbing construction errors. In other words, the function is separated.

  Further, the force acting on the end portion 10T of the steel beam 10 is also transmitted to the end portion 10T of the steel beam 10 by the friction force through the accessory plates 300 and 400 (friction resistance Pf).

  Therefore, by applying both the support resistance Pb (support pressure) and the friction resistance Pf (friction force), the proof stress is improved as compared with the configuration in which either one of the forces is applied (see FIG. 5). .

  In addition, although the magnitude | size of the diameter of the pin hole 17 formed in the flange 12 of the steel beam 10 is not specifically limited, from a viewpoint of making an initial slip small, the first small holes 312A and 412A and the second small holes 322B and 422B Similarly, it is desirable that the diameter be as small as possible.

  The first small hole 312A of the first plate 310 of the accessory plate 300, the second small hole 322B of the second plate 320, the first small hole 412A of the first plate 410 of the accessory plate 400, and the second of the second plate 420. The diameters of the small holes 422B may be different from each other. Similarly, the first large hole 114B of the first plate 310 of the accessory plate 300, the second large hole 324A of the second plate 320, the first large hole 414B of the first plate 410 of the accessory plate 400, and the first large hole 414B of the second plate 420. The diameters of the two large holes 424A may be different from each other. Further, the diameters of the bolt holes 15 of the steel beam 10 may be different.

  Here, as described above, in this embodiment, the clearance between each bolt hole 15, 313, 413, 323, 423 and the bolt 80 is the first plate 310, 410 constituting the accessory plate 300, 400. The clearances between the large holes 314B and 414B and the second large holes 324A and 424A of the second plates 320 and 420 and the shear pin 500 are set to be larger.

  However, the clearances between the bolt holes 15, 313, 413, 323, and 423 with respect to the respective bolts 80 are the first large holes 314 B and 414 B of the first plates 310 and 410 and the second large holes of the second plates 320 and 420. It may be smaller than the clearance between 324A, 424A and the shear pin 500.

  When the clearance between the bolt hole 15 and the bolt 80 in the first plates 310 and 410 is smaller than the clearance between the first large holes 314B and 414B and the shear pin 500B, the first plates 310 and 410 are connected to the bolt 80 and the bolt hole 15. It can move by the clearance. Similarly, when the clearance between the bolt hole 15 and the bolt 80 in the second plates 320 and 420 is smaller than the clearance between the second large holes 324A and 424A and the shear pin 500B, the second plates 320 and 420 are connected to the bolt 80 and the bolt holes. 15 and the clearance can be moved.

  In this embodiment, the shear pin 500 is a circular cylinder having a circular cross-sectional shape, but is not limited thereto. The cross-sectional shape may be other than a circle, for example, a hexagon, a rectangle, or an ellipse. In the case of other than a circle, the shape of the pin hole, the first small hole, the second small hole, the first large hole, and the second large hole is appropriately set to a shape corresponding to the shape of the shear pin. And, when the cross-sectional shape of the shear pin 500 is a hexagon, a quadrangle, an ellipse, etc., it can be set so that the bearing pressure per unit area applied between the shear pin and the hole wall is smaller than the circular shape. This is effective in suppressing plastic deformation of shear pins and hole walls due to supporting pressure.

  Also in this embodiment, similarly to the modification of the first embodiment, a low-rigidity layer 150 (see FIG. 6) may be provided between the first plates 310 and 410 and the second plates 320 and 420. Good.

<Others>
The present invention is not limited to the above embodiment.

  Although the present invention is not applied to the portions joined by the attachment plate 300, the present invention may be applied to the joining portions between the webs 16 joined by the attachment plate 300.

  In addition, a plurality of embodiments and modified examples can be implemented in combination as appropriate. For example, the joining structure of the first embodiment may be applied to the steel beam 10A side, and the joining structure of the second embodiment may be applied to the steel beam 10B side. Alternatively, the joining structure of the first embodiment may be applied to the flange 12 side, and the joining structure of the second embodiment may be applied to the flange 14 side.

  Moreover, in the said embodiment, although the joining structure of this invention was applied to the joining site | part of the edge parts of a steel beam, it is not limited to this.

  For example, the joining structure of the present invention may be applied to a joining portion of a shape steel other than the H-shaped steel (for example, a grooved steel or a steel pipe) or another steel material. In addition, the present invention can be applied to joint portions other than beams. For example, the present invention can also be applied to an outer diaphragm structure in which two diaphragms are welded to the outer periphery of a steel column and the ends of the steel beam are joined to the diaphragm.

  Moreover, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

The following steel structure may be used.
A steel material joining structure that joins one steel material and the other steel material by clamping with bolts from both sides of the ends of the plurality of steel materials,
A first pin member penetrating one end of the steel material;
A second pin member penetrating the end of the other steel material;
Have
The accessory plate is composed of a first plate and a second plate,
The first plate sandwiches an end portion of the one steel material and an end portion of the other steel material from both sides, the first small hole formed on the one steel material side and inserted by the first pin member, and the other A first large hole formed on the steel material side and configured such that a clearance between the first pin member and the first small hole is greater than a clearance between the second pin member and the second pin member inserted therein. Have
The second plate is disposed outside the first plate, is formed on the other steel material side, is inserted into the second pin member, and has a second small hole smaller than the first large hole, A second large hole formed on the steel material side and inserted by the first pin member and larger than the first small hole,
A steel joining structure that joins one steel to the other.
Furthermore, the steel material joining structure, wherein at least one of the first pin member and the second pin member is the bolt.

10A steel beam (one steel)
10B Steel beam (the other steel)
10T end 13 bolt hole 14 bolt hole 16 pin hole 80A bolt (bolt on one side)
80B bolt (bolt on the other side)
100 Substrate 110 First plate 112A First small hole 114B First large hole 120 Second plate 122B Second small hole 124A Second large hole 200 Substrate 210 First plate 212A First small hole 214B First large hole 220 First Two plates 222B Second small hole 224A Second large hole 300 Substrate 310 First plate 312A First small hole 313 Bolt hole 314B First large hole 320 Second plate 322B Second small hole 323 Bolt hole 324A Second large hole 400 Substrate plate 410 First plate 412A First small hole 413 Bolt hole 414B First large hole 420 Second plate 422B Second small hole 423 Bolt hole 424A Second large hole 500A Shear pin (one side pin)
500B Shear pin (Pin on the other side)

Claims (3)

A steel material joining structure that joins one steel material and the other steel material by clamping with bolts from both sides of the ends of the plurality of steel materials,
A bolt hole into which the bolt is inserted is formed at the end of the one steel material and the end of the other steel material,
The accessory plate is composed of a first plate and a second plate,
The first plate sandwiches an end portion of the one steel material and an end portion of the other steel material from both sides, a first small hole formed on the one steel material side and having the bolt on one side inserted therein, The first large member formed on the other steel material side and configured such that a clearance between the bolt on the other side is larger than a clearance between the bolt on the one side and the first small hole, and the bolt on the other side is inserted. A hole, and
The second plate is disposed on the outer side of the first plate, is formed on the other steel material side, is inserted with the bolt on the other side, and has a second small hole smaller than the first large hole, and the one steel material. A second large hole formed on the side and having the one side bolt inserted therein and larger than the first small hole,
Joining steel materials by inserting the bolts into the first small holes, the first large holes, the second small holes, the second large holes, and the bolt holes, and joining one steel material and the other steel material. Construction. A steel material joining structure that joins one steel material and the other steel material by clamping with bolts from both sides of the ends of the plurality of steel materials,
A bolt hole into which the bolt is inserted is formed in the end portion of the one steel material and the end portion of the other steel material, and the accessory plate,
A pin hole into which a pin is inserted is formed at the end of the one steel material and the end of the other steel material,
The accessory plate is composed of a first plate and a second plate,
The first plate sandwiches an end portion of the one steel material and an end portion of the other steel material from both sides, a first small hole formed on the one steel material side and inserted with the pin on the one side, The first large hole formed on the other steel material side and configured such that a clearance between the one side pin and the first small hole is larger than a clearance between the other side pin and the other side pin inserted. Have
The second plate is disposed outside the first plate, is formed on the other steel material side, the second small hole is inserted into the other side pin, and the one steel material is smaller than the first large hole. A second large hole formed on the side and into which the pin on the one side is inserted and larger than the first hole,
The clearance between the bolt hole and the bolt formed in the accessory plate is greater than the clearance between the first small hole and the pin on one side and the clearance between the second small hole and the pin on the other side. Is set to be
While inserting the pin into the first small hole, the first large hole, the second small hole, the second large hole, and the pin hole, and inserting the bolt into the bolt hole, A steel structure joined to the other steel.   The low-rigidity layer comprised with the material whose rigidity is lower than said 1st board and said 2nd board is provided between said 1st board and said 2nd board. Steel material joint structure.

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