JP2013217051A - Junction structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction structure which prevents concentration of force in the horizontal direction, having positive effect on the design of a component.SOLUTION: A junction structure A includes a bolt 18 which is inserted in a long hole 16 and a circular hole 17, and a bolt 18 which is inserted in the through hole 23 of an adaptor 21 disposed in the long hole 16 and intercalated in the joint piece 11b. Since the adaptor 21 is slidable in the long hole 16, the structure allows a force in the horizontal direction only to be transmitted and allows a force in the vertical direction and a moment not to be transmitted. Furthermore, the side face 21a opposite to the peripheral surface 16a of the long hole 16 allows the adaptor 21 to come in planar contact with the peripheral surface 16a of the long hole 16 when a force F in the horizontal direction is transmitted, so that the concentrated application of the force F in the horizontal direction to the joint piece 11b is prevented. A junction structure having positive effect on the design of a component is thus achieved.

Description

  The present invention relates to a joint structure, and more particularly to a joint structure between a column and a beam.

  As a technique in such a field, as described in Patent Document 1 below, a pair of columns is erected between an upper beam and a lower beam (including a foundation beam), and the pair of columns is connected to a connecting material. A shaft group (strength-proof panel) is known which is connected by the following. In the shaft set described in the following Patent Document 1, only a horizontal force is transmitted, and a vertical force and moment are not transmitted at a joint between at least one of the pair of columns and the upper beam or the lower beam. It has a joint structure as described above.

  Specifically, the joint structure of Patent Document 1 below includes a column head fixed to the upper end portion of the column beam connection structure, and a restraining member fixed to the lower flange of the upper beam. The column head has two parallel plates that stand up toward the beam, and the restraining member has one plate that hangs vertically downward and is inserted between the two plates of the column head. Yes. Bolt holes made of circular holes are formed in the two plates of the column head, and bolt holes made of elongated holes that are long in the vertical direction are formed in the plate of the restraining member.

  In this joint structure, a plate of a restraining member is inserted between two plates of the column head, and bolts are inserted through bolt holes formed in these plates, and nuts are screwed together. As a result, when a horizontal force is applied during an earthquake, etc., the horizontal force from the upper beam is transmitted to the upper end of the column via the bolt, and the bolt is moved vertically in the slot. By moving along, the vertical force is not transmitted to the column. In addition, since this joint is joined by a single bolt, the moment is not transmitted between the column head and the restraining member.

JP 2010-150846 A

  In the conventional joint structure described above, the horizontal force is transmitted in a state where the bolt is in contact with the peripheral surface of the long hole formed in the restraining member. At this time, since the bolt comes into linear contact with the peripheral surface of the long hole, the force acting on the plate tends to concentrate on a specific portion. This is not preferable in terms of member design. Therefore, a more preferable joint structure is desired in terms of member design.

  An object of the present invention is to provide a joint structure that can prevent a force in a horizontal direction from acting intensively and is preferable in terms of member design.

  In the joint structure that solves the above-described problem, at least one of the pair of columns, the upper beam, and the lower beam in the shaft assembly in which the pair of columns that are erected between the upper beam and the lower beam are connected by a connecting material. It is a joint structure with any one of the beams, and is fixed to one of the column and the beam, and has a first plate-like portion in which a long hole extending in the vertical direction is formed, and the other of the column and the beam. A second plate-like portion that is fixed and arranged to face the first plate-like portion and has a circular hole formed therein, a long hole and a bolt that is inserted into the circular hole, and a bolt that is inserted into the long hole. And an interposition member interposed between the bolt and the first plate-like portion, the interposition member having a side surface facing the peripheral surface of the long hole and a long length. The inside of the hole is slidable.

  In this junction structure, the first portion fixed to one of the column and the beam is a junction between at least one column of the pair of columns coupled by the coupling material and one of the upper beam and the lower beam. The plate-like portion and the second plate-like portion fixed to the other are arranged so as to face each other. And a bolt is penetrated by the long hole formed in the 1st plate-shaped part, and the circular hole formed in the 2nd plate-shaped part. Here, this bolt is inserted in the insertion hole of the interposition member which is arrange | positioned in a long hole and interposed between 1st plate-shaped parts. Since the interposition member is slidable in the long hole and the first and second plate-like parts are joined via one bolt, this joint structure transmits only a horizontal force, The structure is such that vertical force and moment are not transmitted. Furthermore, since the interposition member has a side surface that opposes the peripheral surface of the long hole, when the force in the horizontal direction is transmitted, the interposition member comes into contact with the peripheral surface of the long hole in a planar shape. It is possible to prevent a horizontal force from acting intensively on the plate-like portion. Therefore, it is possible to realize a preferable joint structure in terms of member design.

  Moreover, in the said junction part structure, the interposed member has comprised the block shape, and the chamfering part is formed in at least one of the upper end of a side surface, and a lower end. According to this configuration, the sliding movement of the interposed member in the long hole becomes smooth.

  Moreover, in the said junction part structure, a volt | bolt is penetrated between an interposed member and a 2nd plate-shaped part, and an interposed member or a 1st plate-shaped part contacts a 2nd plate-shaped part. An annular member to prevent is provided. According to this configuration, when a force in the horizontal direction is applied, the contact between the interposed member or the first plate-like portion and the second plate-like portion is prevented, so that the surface that slides when sliding is the interposed member. Only the contact surface between the side surface and the peripheral surface of the elongated hole is provided, and the force in the vertical direction can be more suitably released.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the force of a horizontal direction acts intensively and can implement | achieve a preferable junction structure on the design of a member.

It is a front view which shows the shaft set with which one Embodiment of junction part structure was applied. It is a perspective view which shows the junction part structure in FIG. It is a disassembled perspective view of the junction part structure of FIG. (A) is a front view which shows the junction part structure of FIG. 2, (b) is sectional drawing which follows the IVB-IVB line | wire of (a). (A) is a perspective view which shows the interposition member in FIG. 3, (b) is sectional drawing which shows notionally the movement state of the interposition member in a long hole. (A) And (b) is a front view which shows notionally the state of the junction structure when the force of a horizontal direction acts. (A) is a perspective view which shows the surface where the force of a horizontal direction acts in the junction part structure of FIG. 2, (b) is a perspective view which shows the part where the force of a horizontal direction acts in the conventional junction part structure. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a shaft group 10 to which the joint structure A of the present embodiment is applied includes an upper beam 1 made of H-shaped steel, a foundation beam (lower beam) 2, an upper beam 1, and a foundation beam. 2 and the pillars of the first pillar 3 and the second pillar 4 provided between the two pillars. The first pillar 3 and the second pillar 4 are connected to each other via a connecting material 6.

  The connecting material 6 includes a steel material damper 6a made of extremely low yield point steel, a long side material 6b serving as the base of the frame, oblique materials 6c and 6d serving as isosceles triangular hypotenuses, and oblique materials 6c and 6d. It has the connection piece 6f to connect, and the horizontal member 6e which connects the connection piece 6f and the long side material 6b, and raises rigidity. The steel damper 6a is bolted to the connecting piece 6f and can be replaced when it deteriorates.

  The first pillar 3 is a pillar body made of a square steel pipe. A column base member 8 is provided at the lower end portion of the first column 3, and the first column 3 is pin-connected to the foundation beam 2 via the column base member 8. A column head member 7 is provided at the upper end portion of the first column 3, and the first column 3 is pin-connected to the upper beam 1 via the column head member 7. In the first column 3, a vertical force acting on the upper beam 1 can be transmitted to the foundation beam 2.

  Similar to the first column 3, the second column 4 is a column made of a square steel pipe. A column base member 8 is provided at the lower end portion of the second column 4, and the second column 4 is pin-connected to the foundation beam 2 via the column base member 8. On the other hand, a column head 12 is fixed to the upper end portion of the second column 4, and the second column 4 is fixed to the foundation beam 2 by the column head 12 and the restraining member 11 fixed to the upper beam 1. Vertical roller joining. Having the column head 12 and the restraining member 11, a joint structure A by vertical roller joining is configured.

  Thus, in the joint structure A, the upper end of the second column 4 is vertically roller-joined to the upper beam 1, so that only the horizontal force is applied to the upper end of the second column 4. 1 is transmitted. The vertical force and moment are not transmitted to the second column 4.

  Hereinafter, the junction structure A will be described in detail. 2 is a perspective view showing the joint structure A in FIG. 1, FIG. 3 is an exploded perspective view of the joint structure A, FIG. 4A is a front view showing the joint structure A, and FIG. ) Is a cross-sectional view taken along the line IVB-IVB in FIG.

  As shown in FIGS. 2 to 4, the joint structure A includes a steel restraining member 11 fixed to the flange 1 a of the upper beam 1 and a steel fixed to the upper end of the second column 4. , A bolt 18 inserted through the restraining member 11 and the column head 12, and a nut 19 screwed into the bolt 18. A washer 20 is provided between the joining piece 12 b and the nut 19.

  The restraining member 11 includes a plate-shaped mounting piece 11a that is disposed in the horizontal direction and is fixed to the flange portion 1a by the mounting bolt 13 and the mounting nut 14, and one sheet that is provided continuously to the mounting piece 11a and hangs vertically downward. And a plate-like joining piece (first plate-like portion) 11b. The joining piece 11b is disposed in parallel with the extending direction of the upper beam 1. Between the attachment piece 11a and the joining piece 11b, the reinforcing rib 11c arrange | positioned in the direction orthogonal to the attachment piece 11a and the joining piece 11b is joined. A long hole 16 extending in the vertical direction is formed at the center in the width direction of the joining piece 11b.

  The column head 12 includes a plate-like mounting piece 12a that is arranged in the horizontal direction and fixed to the upper end of the second column 4 by welding or the like, and two pieces that are connected to the mounting piece 12a and stand vertically upward. It has plate-like joining pieces (second plate-like portions) 12b and 12b. The joining pieces 12b and 12b are arranged in parallel with the attachment piece 11a and are separated from each other by a predetermined distance. That is, the joining piece 11b is disposed between the joining pieces 12b and 12b, and the joining pieces 12b and 12b are opposed to the mounting piece 11a. A circular hole 17 having a diameter slightly larger than that of the bolt 18 is formed in the center portion and the upper portion in the width direction of each of the joining pieces 12b and 12b. The positions of the long holes 16 and the circular holes 17 and 17 are aligned, and bolts 18 are inserted into the long holes 16 and the circular holes 17 and 17.

  Here, in the joint portion structure A of the present embodiment, a block-shaped steel adapter (intervening member) 21 interposed between the bolt 18 and the joint piece 11b is provided in the elongated hole 16 of the joint piece 11b. (See FIGS. 3 and 4). The adapter 21 is a member for more suitably performing horizontal force transmission in the joint structure A and for smoothly moving the column head 12 relative to the restraining member 11. An insertion hole 23 through which the bolt 18 is inserted is formed in the adapter 21.

  Two annular members 22 are provided between the adapter 21 and the joining piece 12b. The annular member 22 has a washer shape, and the bolt 18 is inserted into the insertion hole 22a. The annular member 22 has an outer diameter larger than the width of the long hole 16. The annular member 22 has a function of preventing the adapter 21 and the joining piece 11b from coming into contact with the joining piece 12b.

  FIG. 5A is a perspective view showing the adapter 21, and FIG. 5B is a sectional view conceptually showing a moving state of the adapter 21 in the long hole 16. As shown in FIG. 5A, the adapter 21 has a rectangular parallelepiped outer shape. The adapter 21 has both side surfaces 21a and 21a opposed to the peripheral surface 16a (see FIGS. 3 and 5B) of the long hole 16 formed in the joining piece 11b, and the upper and lower ends of both side surfaces 21a and 21a. It has the upper surface 21b and the lower surface 21c which connect. Chamfered portions 21d are formed at the upper and lower ends of the side surfaces 21a and 21a, respectively.

  As shown in FIG. 4B, the thickness of the adapter 21 in the thickness direction of the joining piece 11b is larger than the thickness of the joining piece 11b. Furthermore, the separation distance between the joining pieces 12b, 12b is set to be slightly larger than the width of the adapter 21 and the thickness of the two annular members 22. As an example of the dimensions, an adapter 21 (thickness 16 mm) and two annular members 22 (thickness 2.3 mm each) are disposed between the joining pieces 12b and 12b having a separation distance of 22 mm. . In this case, a gap of 1.4 mm is formed.

  The width of the adapter 21 in the extending direction of the upper beam 1 is slightly smaller than the width of the long hole 16. That is, the adapter 21 has a width corresponding to the width of the long hole 16 so as to be accommodated in the long hole 16 with a slight gap. Further, the diameter of the insertion hole 23 of the adapter 21 is slightly larger than the diameter of the bolt 18. With this configuration, the bolt 18 is rotatable in the insertion hole 23. Furthermore, the adapter 21 is fitted in the long hole 16 in a loose state. In other words, the adapter 21 is loosely arranged in the long hole 16. The screw thread formed on the bolt 18 is crushed at a predetermined position, and the nut 19 is configured not to be tightened beyond that position.

  The adapter 21 configured as described above is integrated with the column head 12 via the bolt 18 and is slidable in the long hole 16 along the vertical direction. When the adapter 21 is slid, either the left or right side surface 21a is in sliding contact with the peripheral surface 16a. By forming the chamfered portion 21d on the adapter 21, the adapter 21 can be smoothly slid without being caught by the peripheral surface 16a even when slidably contacting the peripheral surface 16a of the long hole 16 (FIG. 5B). reference).

  The length of the long hole 16 in the vertical direction is based on the amount of movement of the upper beam 1 calculated from the assumed acting force, and does not reach the upper and lower ends of the long hole 16 even if the adapter 21 moves to the maximum. In addition, it is said that the length has a margin.

  FIGS. 6A and 6B are front views conceptually showing the state of the joint structure A when a horizontal force is applied. As shown in FIG. 6A, when a horizontal force F1 is applied to the upper beam 1 during an earthquake, for example, the restraint member 11 moves in the horizontal direction integrally with the upper beam 1, while the second beam The column 4 and the column head 12 are slightly inclined by receiving the force F1. Here, the adapter 21 descends in the long hole 16 while sliding on the joining piece 11 b (the peripheral surface 16 a on the right side in the figure), and the column head 12 rotates with respect to the adapter 21. Thereby, the force and moment in the vertical direction are not transmitted to the second pillar 4 and the pillar head 12. As shown in FIG. 6B, when the force F2 in the direction opposite to the force F1 is applied, the second column 4 and the column head 12 receive the force F2 as in the case of the force F1. Although tilted slightly, vertical force and moment are not transmitted to the second column 4 and the column head 12. In the shaft group 10 having the connecting member 6 (see FIG. 1), a force that pulls up or pushes down the second column 4 tends to act. By having the joint structure A, such a vertical force acts. The foundation beam 2 can be protected.

  According to the joint structure A of the present embodiment described above, the bolt 18 is inserted into the long hole 16 formed in the joint piece 11b and the circular hole 17 formed in the joint piece 12b. Is inserted into the insertion hole 23 of the adapter 21 that is disposed in the long hole 16 and interposed between the bonding piece 11b. Since this adapter 21 is slidable in the long hole 16 and the joining pieces 11b and 12b are joined via one bolt 18, the joining portion structure A transmits only a horizontal force and is vertically Directional force and moment are not transmitted. Furthermore, since the adapter 21 has the side surface 21a that faces the peripheral surface 16a of the long hole 16, the adapter 21 comes into contact with the peripheral surface 16a of the long hole 16 in a planar shape when the horizontal force F is transmitted. Thus (see the contact surface B in FIG. 7A), it is possible to prevent the horizontal force F from acting intensively on the joining piece 11b. Therefore, a preferred joint structure in terms of member design is realized.

  As shown in FIG. 7 (b), in the conventional joint structure 100, the bolt 60 is merely inserted into the long hole 50, and therefore, when the force F acts, the side surface of the bolt 60 becomes the long hole 50. It contact | abutted linearly to the surrounding surface 50a. Thus, when the contact part C is linear, an excessive force acts on the linear contact part C in a concentrated manner. For example, it is conceivable that the screw thread of the bolt 60 bites into the peripheral surface 50a of the joining piece 51b. As a result, the bolt 60 is difficult to slide in the long hole 50, and the sliding movement is hindered. According to the joint structure A, as shown in FIG. 7A, the contact surface B is planar, so that the action of concentrated force on a specific portion is avoided, and the force is applied to the contact surface B. Distributed within. Therefore, the transmission of the force F is suitably performed and the slide movement is smoothly performed.

  The adapter 21 has a block shape, and a chamfered portion 21d is formed on at least one of the upper end and the lower end of the side surface 21a, so that the adapter 21 can smoothly slide in the long hole 16 (see FIG. 5 (b)).

  Further, since the annular member 22 is provided between the adapter 21 and the joining piece 12b, contact between the adapter 21 or the joining piece 11b and the joining piece 12b is prevented when a horizontal force F is applied. The sliding surface is only the contact surface B between the side surface 21a of the adapter 21 and the peripheral surface 16a of the long hole 16, and the force in the vertical direction can be more suitably released.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment.

  For example, in the above-described embodiment, the case where the joining piece 11b is fixed to the upper beam 1 and the joining piece 12b is fixed to the second column 4 has been described, but conversely, the first in which a long hole is formed. The plate-like portion may be fixed to the column side, and the second plate-like portion in which a circular hole is formed may be fixed to the beam side. Moreover, although the said embodiment demonstrated the case where the two joining pieces 12b of the column head 12 were provided, one piece may be sufficient. The adapter 21 is not limited to the block shape, and may have another shape having a side surface facing the peripheral surface 16a of the long hole 16. The adapter 21 may not have the chamfered portion 21d. Further, the annular member 22 can be omitted.

  Further, the lower beam is not limited to the foundation beam 2 and may be a steel beam. The joint structure A may be provided between the second column 4 and the lower beam, or may be provided between the first column 3 and the lower beam. The junction structure A may be provided on each floor, or may be provided only on the lower floor (first floor) or only on the upper floor (second floor, etc.).

  DESCRIPTION OF SYMBOLS 1 ... Upper beam (any one beam), 2 ... Foundation beam (lower beam), 3 ... 1st pillar, 4 ... 2nd pillar (one pillar), 6 ... Connecting material, 10 ... Shaft group, 11b: Joining piece (first plate-like part), 12b ... Joining piece (second plate-like part), 16 ... Long hole, 16a ... Peripheral surface, 17 ... Round hole, 18 ... Bolt, 21 ... Adapter (intervening) Member), 21a ... side face, 22 ... annular member, 23 ... insertion hole, A ... junction structure.

Claims (3)

At least one column of the pair of columns and one of the upper beam and the lower beam in a shaft set in which a pair of columns erected between the upper beam and the lower beam are connected by a connecting material. The joint structure with
A first plate-like portion fixed to one of the column and the beam and having a long hole extending in the vertical direction;
A second plate-like portion fixed to the other of the column and the beam and arranged to face the first plate-like portion, and having a circular hole;
A bolt inserted through the elongated hole and the circular hole;
An insertion member disposed in the elongated hole, having an insertion hole through which the bolt is inserted, and interposed between the bolt and the first plate-like portion;
The interposition member has a side surface facing the peripheral surface of the long hole and is slidable in the long hole.   The joint structure according to claim 1, wherein the interposition member has a block shape, and a chamfered portion is formed on at least one of an upper end and a lower end of the side surface.   The bolt is inserted between the interposition member and the second plate-like portion to prevent the interposition member or the first plate-like portion from contacting the second plate-like portion. The junction structure according to claim 1, wherein an annular member is provided.

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