JP4833627B2 - Vibration-damping joint structure between column members such as columns and beams - Google Patents

Description

  The present invention relates to a vibration-damping joint structure between frame members such as column beams.

  For example, as a column beam connection structure in a building with a wooden frame structure, the jaw hanging plate part of the jaw hanging metal fixture fixed to the side part of the wooden pillar is inserted into the slit that opens on the end surface of the wooden beam, and the slit is formed at the end of the beam. The jaw hanging pin driven from the side so as to penetrate the jaw is hung on the jaw hanging portion of the jaw hanging plate portion, and, for example, two lock pins are passed through the jaw hanging plate portion in the slit at the end of the beam. Such a structure in which a pillar and a beam are joined together is conventionally provided.

  However, in the joint structure as described above, when a huge earthquake occurs, the building is greatly deformed by horizontal vibration due to the earthquake, and the lock pin and the jaw pin are broken, and the building may collapse.

  In view of the problems as described above, the present invention has an object to provide a joint structure between shaft members such as column beams that can suppress the collapse of a building due to a huge earthquake while being a pin joint type. To do.

  The above problem is that the first shaft assembly material and the second shaft assembly material are joined by one first pin and at least one second pin, and the second pin precedes the first pin by vibration. Vibration energy absorbing means for preventing the relative rotational displacement of both shaft assemblies, wherein the both shaft assemblies are displaced relative to each other by the first pin. This is solved by the vibration-damping joint structure between the shaft members characterized by being provided with (1st invention).

  In this joint structure, when the second pin breaks due to vibration caused by a huge earthquake, both shaft assemblies cause a relative rotational displacement about one first pin. Displacement is suppressed, thereby preventing collapse due to large deformation of the building.

In addition, the above problem is that the jaw hanging plate portion of the jaw fitting fixed to the side surface portion of the column and the plate portion of the second bonding fixture fixed to the beam overlap in a slit opened on the end surface of the beam. Plugged into the placement state,
One jaw hanging pin driven from the side so as to penetrate the slit at the end of the beam is hung on the jaw hanging portion of the jaw hanging plate portion, and at least one second pin is a jaw hanging in the slit. The pillar and beam are joined by being driven through the plate, and
Due to the horizontal vibration, the second pin is broken prior to the jaw hanging pin, and the jaw hanging plate portion and the plate portion of the second joint metal are relatively rotationally displaced about the jaw hanging pin as a result of the breakage. This is solved by a column-beam vibration-damping joint structure characterized in that vibration energy absorbing means for suppressing the relative rotational displacement between them is provided (second invention).

  This joint structure is for joining column beams using the jaw joint hardware used in the wooden frame structure. Similarly, when the second pin breaks due to horizontal vibration caused by a large earthquake, the jaw suspension plate part And the plate part of the second bonding hardware cause relative rotational displacement about one jaw hook pin, but the relative rotational displacement between the jaw hanging plate part and the second bonding metal plate part is suppressed by the vibration energy absorbing means. As a result, collapse due to large deformation of the building is suppressed.

  As the vibration energy absorbing means, a viscous material or a viscoelastic material is provided between the jaw hanging plate portion and the plate portion of the second bonding hardware, and the jaw hanging plate portion and the second bonding portion are made of the viscous material and the viscoelastic material. Adopting a friction damping mechanism that suppresses the relative rotational displacement of the metal plate part and a frictional force that suppresses the relative rotational displacement of the jaw hanging plate part and the plate part of the second joining hardware by a friction force. Is done.

  Moreover, in the structure of the second invention, in addition to the jaw-hanging metal fitting, a second bonding hardware is used, and vibration energy absorbing means is provided between the jaw hanging plate portion and the plate portion of the second bonding hardware. Therefore, the column and the beam are controlled by using the composite metal fitting of the jaw hanging metal fitting and the second joining hardware provided with the vibration energy absorbing means between the jaw hanging plate portion and the plate portion of the second joining hardware. Vibration welding can be performed, and the vibration energy absorbing means can be easily incorporated into the beam-column joint.

  And since the jaw hanging plate part, the plate part of the second joint metal fitting, and the vibration energy absorbing means are housed in a slit that opens in the end face of the beam, the column beam joint part has a refreshing appearance. can do.

In addition, the above problem is that the plate portion of the first joint hardware fixed to the side surface portion of the column and the plate portion of the second joint hardware fixed to the beam overlap with each other in a slit opened on the end surface of the beam. Plugged into
The column and the beam are joined by one first pin and at least one second pin which are driven from the side so as to penetrate the plate portion of the first joint metal in the slit at the end of the beam, and
The second pin is broken prior to the first pin by horizontal vibration, and the plate portion of the first joint metal and the plate portion of the second joint metal are rotated relative to each other about the first pin due to the break. The present invention is also solved by a column-beam vibration-damping joint structure characterized in that a vibration energy absorbing means for suppressing the relative rotational displacement between them is provided (third invention). .

  That is, when the second pin breaks due to horizontal vibration caused by a huge earthquake, the plate parts of the first and second joint hardware cause relative rotational displacement about the first pin. Relative rotational displacement is suppressed, and thereby collapse due to large deformation of the building is suppressed, and a composite consisting of both joint hardware provided with vibration energy absorbing means between the plate parts of the first and second joint hardware It is possible to vibration-damage the column and beam using hardware, and the vibration energy absorbing means can be easily incorporated into the beam-column joint. In addition, the first and second joints Both the metal plate portion and the vibration energy absorbing means can form a column-beam joint with a clean appearance that is housed in a slit that opens in the end face of the beam.

  Since the present invention is as described above, the collapse of the building due to a huge earthquake can be suppressed while being a pin joint type.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The vibration-damping joint structure of the embodiment shown in FIG. 1 and FIG. 2 is a case where it is used for joining column beams of a wooden frame structure. 1 is a wooden pillar as a first axle member, and 2 is a second axis. Wooden beam as an assembly material, 3 is an attachment metal for jaws, 4 is a second attachment metal, 5 is an attachment pin as a first pin, 6 and 6 are lock pins as a second pin, and 7 is vibration energy absorbing means In the end of the beam 2, two slits 8, 8 that are open in the vertical direction and open in the end face are formed in parallel to each other at the end of the beam 2, and the jaw pin Horizontal holes 2 a, 2 b... Through which 5 and the lock pins 6, 6 are provided so as to penetrate the slits 8, 8.

  The jaw-hanging metal fitting 3 is formed by forming a metal plate into a U-shape, and each side portion 3a, 3a is used as a pair of jaw-hanging plate portions, and the lower side of each jaw-hanging plate portion 3a, 3a is lowered. The jaw hooking portions 3b and 3b that are located at the top and are opened upward, and the upper and lower two lock pin insertion holes 3c and 3c are provided at the corresponding positions in the plane of the jaw hooking plate portions 3a and 3a. The plate portion 3d is an attachment portion to the pillar 1, and the jaw hanging plate portions 3a and 3a can be inserted into the slits 8 and 8 that are opened in the end face of the beam 2.

  Also, the second metal fitting 4 is formed of a metal plate molded product having a U-shape in plan view and closed at the lower end portion by the bottom plate portion 4a, and each side portion 4b, 4b is a pair of plate portions, In the plane of each plate part 4b, 4b, two upper and lower lock pin insertion holes 4c ... corresponding to the lock pin insertion holes 3c ... provided in the jaw hanging plate part 3a are provided, and the bottom plate part 4a to the beam 2 is provided. As the mounting part.

  As shown in FIG. 2 (b), the second metal fitting 4 is formed in the jaw metal fitting 3 so that the plate portions 4b and 4b overlap each other on the inner surface side of the jaw hanging plate portions 3a and 3a. As shown in FIG. 2 (c), a layer made of viscous materials 7 and 7 is provided between the plate portion 4b ... of the second metal fitting 4 and the jaw hanging plate portion 3a ... Thus, a composite hardware 9 composed of the jaw-attached metal fitting 3, the second metal fitting 4, and the viscous material 7 is formed.

  In this composite metal object 9, the pin insertion holes 3c, 4c, ... are located in the plane of the overlapping portion of the plate portion 4b and the jaw hanging plate portion 3a, and the jaw hanging portion 3b of the jaw hanging plate portion 3a is: As shown in FIG. 1 (a), it protrudes out of the plate portion 4b, and the jaw hanging pin 5 is hung on the jaw hanging portion 3b at a distance from the plate portion 4b.

  In addition, annular grooves 6a and 6a are provided on the outer peripheral portion of each lock pin 6, and the lock pin 6 precedes the jaw pin 5 by horizontal vibration due to an earthquake with the annular groove portions 6a and 6a being inferior in strength. And is to be broken.

  And the pillar 1 and the beam 2 are joined as follows using the above-mentioned composite hardware 9, the jaw hanging pin 5, and the lock pins 6 and 6. That is, the composite metal fitting 9 is attached to the pillar 1 by attaching the intermediate plate portion 3d of the jaw fitting metal fitting 3 to the side face of the pillar 1 with screws 10. 2 is driven from the side so as to penetrate through the slits 8 and 8. Then, the end portion of the beam 2 is lowered from above the composite hardware 9 of the pillar 1, and the jaw hanging plate portions 3 a and 3 a of the jaw hanging joint 3 and the plate portions 4 b and 4 b of the second joining hardware 4 are The beam 2 is held by the column 1 by inserting into the slits 8 and 8 of the beam 2 and placing the jaw hanging pin 5 on the jaw hanging portions 3b and 3b of the jaw hanging plate portions 3a and 3a. Thereafter, the bottom plate portion 4a of the second metal fitting 4 is fixedly attached to the beam 2 with screws 10 and the lock pins 6 and 6 are inserted from the side into the end of the beam 2 to complete the joining. is there.

  In the above-mentioned column beam connection structure, the lock pins 6 and 6 break before the jaw pin 5 due to horizontal vibration caused by a huge earthquake. Then, as shown in FIGS. 3 (A) and 3 (B), the jaw hanging plate portions 3a, 3a and the plate portions 4b, 4b of the second metal fitting 4 are subjected to relative rotational displacement with the single jaw hanging pin 5 as an axis. However, the viscous material 7 suppresses the relative rotational displacement between the jaw hanging plate portion 3a and the plate portion 4b of the second bonding hardware 4, thereby suppressing a large deformation and suppressing the collapse of the building.

  Moreover, in addition to the jaw hanging metal fitting 3, the second joining metal fitting 4 is used for joining the column 1 and the beam 2, and the viscous material 7 is interposed between the jaw hanging plate portion 3 a and the plate portion 4 b of the second joining fitting 4. Since the layer is formed, the composite metal fitting 9 of the jaw metal fitting 3 and the second metal fitting 4 provided with the layer of the viscous material 7 between the jaw metal plate portion 3a and the plate portion 4b is used. As described above, it is possible to perform vibration-damping joining between the column 1 and the beam 2 and to easily incorporate the viscous material 7 into the column-beam joint.

  Of course, both the jaw hanging plate portion 3a, the plate portion 4b of the second metal fitting 4 and the viscous material 7 firmly hold the structure that can be accommodated in the slit 8 opened on the end face of the beam 2, so that the column beam joint portion is fixed. The appearance can be refreshed.

  As shown in FIG. 1 (d), the jaw hooking portion 3b of the jaw hooking metal fitting 3 is widened in the axial direction of the beam 2 so that the jaw hooking pin 5 can play in the axial direction of the beam 2. In this case, it is possible to more reliably prevent the jaw pin 5 from being broken. Although not shown, the entrance side of the jaw hanging portion 3b may be narrowed so that the jaw hanging pin 5 is forcibly fitted to the jaw hanging portion 3b. In this case, the jaw hanging portion The detachment of the jaw hooking pin 5 from 3b can be prevented in a suppressive manner.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the lock pins 6 and 6 are broken prior to the jaw hooking pin 5 so that the lock pin 6 is provided with the annular groove 6a. However, the strength of the annular groove 6a and the like is poor. The lock pin may be made of a material that is weaker in strength than the jaw hanging pin such as a low yield point steel, or the lock pin breaks prior to the jaw hanging pin. It only has to come to do.

  Further, as a modification of the above embodiment, although not shown, in the joint structure of the above embodiment, the jaw hooking metal fitting 3 is omitted from the jaw hooking portion 3b, the jaw hooking pin 5 is omitted, and the upper and lower locks are omitted. One of the pins 6 and 6 may be a first pin, and the other may be a second pin, and the second pin may be broken before the first pin by horizontal vibration.

  Furthermore, although the case where it used for joining the column beam of a wooden frame structure was shown in said embodiment, the column beam to join is not restricted to wood. Furthermore, the structure of the first invention can be widely used not only for joining the columns and beam ends but also for joining the frame members constituting the frame structure.

FIG. 1A is a partially sectional front view, FIG. 2B is a cross-sectional plan view taken along the line II of FIG. 1A, and FIG. The front view of the state by which the jaw hooking pin was hung on the jaw hooking part of this, FIG. (D) is a front view which shows the other example of an jaw hanging metal fitting. FIG. 1A is an exploded perspective view of the joint, FIG. 2B is a perspective view of the composite hardware, and FIG. 1C is a plan view of the composite hardware. Figures (a) and (b) are partial cross-sectional front views showing the behavior of the joint during a huge earthquake.

Explanation of symbols

1 ... Pillar (first shaft assembly)
2 ... Beam (second shaft assembly)
DESCRIPTION OF SYMBOLS 3 ... Jaw metal fitting 3a ... Jaw board part 3b ... Jaw hook part 4 ... 2nd metal fitting 4b ... Plate part 5 ... Jaw hook pin (1st pin)
6 ... Lock pin (2nd pin)
7. Viscous material (vibration energy absorbing means)
8 ... Slit 9 ... Complex hardware

Claims (2)

The jaw hooking plate part of the metal fitting attached to the side of the column and the plate part of the second metal fitting fixed to the beam are inserted so as to overlap with each other in a slit opened on the end face of the beam. And
One jaw hanging pin driven from the side so as to penetrate the slit at the end of the beam is hung on the jaw hanging portion of the jaw hanging plate portion, and at least one second pin is a jaw hanging in the slit. The pillar and beam are joined by being driven through the plate, and
Due to the horizontal vibration, the second pin is broken prior to the jaw hanging pin, and the jaw hanging plate portion and the plate portion of the second joint metal are relatively rotationally displaced about the jaw hanging pin as a result of the breakage. A beam-to-column vibration-damping joint structure characterized by comprising vibration energy absorbing means that suppresses relative rotational displacement between them. The plate portion of the first joint hardware fixed to the side surface portion of the column and the plate portion of the second joint hardware fixed to the beam are inserted so as to overlap with each other in a slit opened on the end surface of the beam,
The column and the beam are joined by one first pin and at least one second pin which are driven from the side so as to penetrate the plate portion of the first joint metal in the slit at the end of the beam, and
The second pin is broken prior to the first pin by horizontal vibration, and the plate portion of the first joint metal and the plate portion of the second joint metal are rotated relative to each other about the first pin due to the break. A column-beam vibration-damping joint structure characterized in that a vibration energy absorbing means for suppressing the relative rotational displacement is provided between them while being displaced.

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