JP2005042403A - Seismic response control damper for wooden house, made of superplastic alloy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seismic response control damper made of a superplastic alloy, which is mounted mainly on a connection part between a column and a beam of a wooden house so as to be used for seismic strengthening. <P>SOLUTION: This seismic response control damper is composed of a narrow deformed part which is curved in an arc shape with almost parallel width in the in-plane direction of a column/beam frame, and supporting parts, which are made wider enough to bring about nondeformation, at both ends thereof; and the deformed part is manufactured of the superplastic alloy. Constitutionally, the seismic response control damper is combined with a mounting fitting for mounting and fixing the supporting parts at both the ends to the column/beam connection part of the house. In the deformed part, a cross-sectional area and a section modulus are made gradually larger from its end to its central part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to a technical field of a damping damper made of a superplastic alloy, which is mainly used for seismic reinforcement by attaching to a joint portion of a column and a beam of a wooden house.

Damping dampers used for seismic reinforcement of wooden houses are expected to reduce the shaking of the houses during earthquakes, reduce damage to the houses, and maintain healthy lives and assets.
The existing seismic dampers for wooden houses are broadly classified into those using steel, those using viscoelastic bodies, those using oil dampers, and the like.

For example, Patent Documents 1 and 2 listed below disclose steel-based damping dampers used for the framework of wooden houses.
Further, Patent Documents 3 and 4 disclose viscoelastic dampers used for a framework of a wooden house.
Patent Documents 5 and 6 disclose wall-type damper devices and vibration control devices that use oil dampers.

  In addition, Patent Documents 7 and 8 disclose elastic-plastic dampers, and Patent Documents 9 and 10 each disclose a vibration control device using a so-called superplastic alloy such as a zinc-aluminum alloy.

JP 2002-235456 A JP 2002-235457 A JP 2000-160683 A JP 2001-295506 A JP 2000-213202 A JP 2001-3597 A JP-A-5-26274 Japanese Patent Laid-Open No. 5-26275 JP 2002-242988 A JP 2002-250149 A

The steel-based damping dampers disclosed in Patent Documents 1 and 2 described above are subject to instability in which the yield load gradually changes due to repeated deformation and the damping performance changes when subjected to a plastic strain history due to an earthquake or the like. is there. That is, the yield load increases due to the work hardening of the steel material, and the elastic region of the material becomes longer after the second time, and the energy absorption performance becomes unstable. This is a remarkable characteristic even when an extremely low yield point steel is used for the steel system damping damper.
Steel-based seismic dampers are subject to deterioration of mechanical properties when subjected to plastic strain, making it difficult to grasp the performance during continuous use, and often require inspection and replacement. The problem is that a considerable amount of costs are incurred.

  The viscoelastic dampers disclosed in Patent Documents 3 and 4 have a very large temperature dependency, and heat dissipation due to absorption of seismic energy is poor, and the strength is greatly reduced during repeated deformation. Seismic performance becomes unstable. When applied to a general wooden house with a large difference in fluctuations in outside air temperature, the operating temperature will vary greatly depending on seasonal factors such as summer and winter, and the vibration control performance will be greatly affected. is there.

  Since the oil dampers disclosed in Patent Documents 5 and 6 are generally implemented by a linear motion mechanism, it is necessary to attach a lot of auxiliary members and metal fittings in order to ensure a smooth movement of the oil damper. The structure cannot be compactly accommodated in the joints of the columns and beams, and cost reduction is not easy. That is, since the linear motion mechanism and the like have a complicated configuration, it becomes expensive. In addition, it is necessary to pay attention to performance deterioration due to oil leakage, etc., and regular maintenance and inspection are necessary, which is expensive.

  The elasto-plastic dampers disclosed in Patent Documents 7 and 8 and so-called superplastic alloys such as zinc-aluminum alloys disclosed in Patent Documents 9 and 10 are large-scale buildings such as buildings. In the first place, it does not have a structure and performance that can be applied to the column and beam joints of wooden houses.

  An object of the present invention is a damping damper using a superplastic alloy, which is small and compact so that it can be applied to a column and beam joint of a wooden house, is sufficiently inexpensive, and is suitable for a wooden house. It provides easy installation and installation, can improve the seismic safety of wooden houses, and provides seismic dampers for wooden houses that can be used maintenance-free for the life of wooden houses even if they encounter a major earthquake. That is.

As means for solving the above-mentioned problem, a vibration damping damper for a wooden house made of a superplastic alloy according to the invention described in claim 1 is:
A damping damper 3 made of a superplastic alloy, which is attached to the joints of the pillar 1 and the beam 2 of the wooden house in a direction approximately 45 °,
A narrow deformable portion 31 that is curved into an arc shape having a substantially parallel width in the in-plane direction of the column / beam frame, and a support portion 30 that is widened to a width that is large enough to prevent the deformation of both ends thereof. And at least the deformed portion made of a superplastic alloy, and a mounting bracket 4 for fixing and fixing the support portions 30 at both ends of the vibration damper 3 to a pillar / beam joint of a house. In combination with
The deforming portion 31 is formed such that the cross-sectional area and the section modulus gradually increase from the end portion to the central portion so as to be uniformly deformed from the end portion to the central portion.

  The invention described in claim 2 is the damping damper 3 for a wooden house using the superplastic alloy according to claim 1, wherein the superplastic alloy is a zinc-aluminum alloy (Zn-Al alloy). .

The invention described in claim 3 is the seismic damper 3 for a wooden house using the superplastic alloy according to claim 1 or 2,
The support 30 at both ends of the damping damper 3 and the mounting bracket 4 for mounting and fixing it to the pillar / beam joint of the house are pins in which the pin 5 is passed through the pin holes 32 and 42 provided in both of them. It is the structure of connection.

The damping damper 3 for a wooden house made of a superplastic alloy according to the first to third aspects of the invention uses a superplastic alloy and is compact and compact so that it can be applied to a column and beam joint of a wooden house. Is sufficiently inexpensive. In addition, the installation and installation on the wooden house is simple, and the earthquake-resistant safety of the wooden house can be improved, and maintenance-free use is possible during the service life of the wooden house even if it encounters a large earthquake. Therefore, the labor and cost of dismantling and restoration of the finishing material associated with inspection and replacement of the damping damper are unnecessary. It can be applied regardless of whether the wooden house is a newly built house or an existing house, and is highly versatile. Even if it is applied to wooden temples and pillars and beam joints of traditional buildings in Buddhist temples, it exhibits sufficient vibration control effects.
Furthermore, the damping damper 3 according to the present invention is very easy to manufacture in large size according to the scale of the building based on the above-described concept (shape design method) and to combine a plurality of them. In addition, sufficient performance can be exhibited as a steel structure or truss structure mainly composed of medium-scale bolt joints, or as a damping damper such as a steel roof.

A narrow deformed portion that is curved into an arc shape having a substantially parallel width in the in-plane direction of the pillar / beam frame, and a support portion that is widened to a width large enough to be non-deformable at both ends. Comprising at least the deformed portion made of a superplastic alloy and a mounting bracket for attaching and fixing the support portions at both ends of the damping damper to a pillar / beam joint of a house. ,
The deforming portion is formed and implemented so that the cross-sectional area and the section modulus gradually increase from the end portion to the central portion so as to uniformly deform from the end portion to the central portion.

FIG. 1 shows that a damping damper 3 made of a superplastic alloy according to the invention described in claims 1 to 3 is attached to a joint portion of a pillar 1 and a beam 2 of a wooden house by a mounting bracket 4 or 4 in a direction of approximately 45 °. The use state attached to the arrangement is shown.
As shown in FIG. 2, the damping damper according to the present invention includes a damping damper 3 made of a superplastic alloy, and support portions 30 and 30 at both ends of the damping damper 3. It is comprised with the combination with the attachment metal fitting 4 attached and fixed to the joint part of 2 with a wood screw etc.
The seismic damper 3 has a narrow deformed portion 31 that is curved in an arc shape having a substantially parallel width in the in-plane direction of the pillar / beam frame of the house, and a size that is necessary and sufficient for non-deformation of both ends thereof. And a support portion 30 widened to the width of at least one, and at least the deformation portion 31 is made of a superplastic alloy.

Specifically, as shown in FIG. 3, the narrow deformed portion 31 that is curved into an arc shape having a substantially parallel width in the in-plane direction of the column / beam frame has a constant plate thickness and supports portions at both ends. An arc such as an earthquake that enters through an applied point (position of a pin coupling hole 32 to be described later) provided at 30 is curved into an arc shape with a curvature that takes into consideration that it acts as a resultant force of an axial force and a bending moment. As an example, the radius of curvature of the neutral line is about 50 mm to 250 mm.
If the deformed portion 31 has a linear shape, bending deformation of the deformable portion 31 is not smoothly introduced, and deformation concentrates at the boundary portion between the end portion of the deformable portion 31 and the support portion 30, so-called strain concentration occurs. There is an inconvenience. The deformed portion 31 curved in an arc shape is a device that maintains the arc shape even at the maximum deformation so that bending deformation is maintained and tensile deformation does not occur (does not stretch). By such a device, although the vibration damper 3 can tolerate large deformation, it is not necessary to stiffen the damper with a buckling stiffening member, and a very simple structure can be implemented.

  As a precaution, the central portion farthest from the straight line PQ connecting the positions of the left and right pin connection holes 32 in the arcuately deformed portion 31 is the position of the maximum moment. As is clear from the above, if the deformed portion 31 has a parallel width over its entire length, deformation concentrates on the central portion. In this case, although the deformation performance is excellent, unnecessary local deformation (strain concentration) is forced, and the advantage of the superplastic alloy that achieves large energy absorption in the entire deformation portion 31 cannot be fully utilized. That is, it is important to avoid stress concentration as a high-performance damper made of a superplastic alloy. As the means, the damping damper 3 according to the present invention causes the deformable portion 31 to be uniformly deformed from the end portion to the central portion (or to an external force) even if the axial force and the bending moment act simultaneously as described above. Accordingly, the sectional area and the section modulus from the end portion to the center portion of the deformable portion 31 are gradually increased so that the edge stress level of the damper is made uniform). 1). Thus, the damping damper 3 of the present invention has an outer appearance of the deformed portion 31 having a small width at the end and a slightly larger width at the central portion.

  In addition, as a superplastic alloy constituting the damping damper 3 of the present invention, as disclosed in, for example, Japanese Patent Application Laid-Open No. 11-222463, a zinc-aluminum alloy (Zn) having a property that does not cause work hardening and strain deterioration. -Al alloy) (Invention described in claim 2). As for the support portions 30 at both ends, the cross-sectional area and rigidity necessary for concentrating the deformation on the arc-shaped deformation portion 31 need only be ensured, and are necessarily made of the same superplastic alloy as the deformation portion 31. Is not required. The support portion 30 may have a structure covered with a steel pipe or the like, and the function is not impaired at all even if the support portion 30 is attached to the mounting bracket 4 via them.

  Next, the mounting bracket 4 for mounting and fixing the support portions 30 at both ends of the seismic damper 3 having the above-described configuration to the joint portions of the pillar 1 and the beam 2 of the wooden house is such that the seismic force is transmitted to the above-described application point. It is enough to support it. Therefore, the embodiment shown in FIG. 2 is composed of a pair of half-shaped metal fittings 40, 40 assembled to both surfaces of the support portions 30 at both ends of the vibration damping damper 3. The metal fittings 40 need only be suitable for attaching and fixing the support portions 30 at both ends of the vibration control damper 3 to the joints of the pillar 1 and the beam 2 of the wooden house in a direction of approximately 45 °. The shape is not particularly limited as long as it has sufficient strength to receive the generated load. The web 41 of the metal fitting 40 is provided with a pin hole 42 that is connected through the steel pin 5 in common with the pin hole 32 provided at the position of the above-described force point of the support portion 30 at both ends of the vibration damper 3. Yes. The bottom flange portion 43 is provided with a plurality of through holes 44 for attaching and fixing the metal fitting 40 to the joints of the wooden house pillar 1 and the beam 2 with wood screws or the like. Invention described in the above).

The seismic damper 3 having the above-described configuration is basically formed by placing the web 41 of the pair of metal fittings 40 and 40 constituting the attachment metal fitting 4 on both surfaces of the support portions 30 at both ends thereof and connecting the pins 5 to each other. The flange part 43 of the metal fitting 40 is attached and fixed to the joints of the pillar 1 and the beam 2 of the wooden house with wood screws or the like.
When appropriate, the arc-shaped deformed portion 31 of the damping damper 3 as a whole induces elasto-plastic deformation at the time of the earthquake in a concentrated manner, and uniformly deforms from the end portion to the center portion to absorb a large amount of energy. Demonstrates performance and exhibits seismic control effect. And although large deformation | transformation is accept | permitted, a buckling stiffening member etc. are unnecessary and a structure is very simple and simple. In addition, the deformable portion 31 made of a superplastic alloy has excellent deformation performance and is self-healing of strain (a property in which mechanical properties are hardly deteriorated due to strain history), so that it is mechanical even when subjected to multiple plastic history strains. Degradation of properties, that is, work hardening and distortion degradation are stable and stable, so it is easy to grasp the performance of continuous use, there is no need for inspection and replacement, and maintenance-free can be realized during the service life . Of course, performance is not affected by fluctuations in the outside air temperature.
Although the superplastic alloy-based damping damper 3 can be manufactured by a machining method, a warm-forging superplastic near-net forming method (for example, described in Japanese Patent Application Laid-Open No. 2003-129204) utilizing the characteristics of the material. (See invention) is most efficient. It is also possible to mass-produce at a low cost by a press forming method utilizing the huge deformation performance of superplastic alloys. In this case, the mechanical properties are not deteriorated by the molding process.
Note that the mounting bracket 4 is not limited to the above-described pin connection, and may be configured to attach the damping damper 3 to the joints of the pillar 1 and the beam 2 of the wooden house with a so-called rigid joint structure.

It is the elevation which showed the use condition of the damping damper for wooden houses which concerns on this invention. It is the perspective view which decomposed | disassembled and showed the structure of the said damping damper. A and B are a plan view and a front view of the damping damper.

Explanation of symbols

1 pillar 2 beam 3 damping damper 31 deformation part 30 support part 4 mounting bracket 32 pin hole (forced part)
42 pin hole 5 pin

Claims (3)

A damping damper made of a superplastic alloy that is attached to a column and beam joint of a wooden house with a 45 ° orientation.
A narrow deformed portion that is curved into an arc shape having a substantially parallel width in the in-plane direction of the pillar / beam frame, and a support portion that is widened to a width large enough to be non-deformable at both ends. It consists of a combination of a vibration damper made of a superplastic alloy at least for the deformed portion, and a mounting bracket for mounting and fixing the support portions at both ends of the vibration damper to the column / beam joint of a house. ,
The deforming portion is formed so that a cross-sectional area and a section modulus gradually increase from the end portion to the central portion so as to uniformly deform from the end portion to the central portion. A damping damper for wooden houses made of plastic alloy.   The damping plastic damper for a wooden house using the superplastic alloy according to claim 1, wherein the superplastic alloy is a zinc-aluminum alloy (Zn-Al alloy).   The support parts at both ends of the damping damper and the mounting bracket that attaches and secures it to the pillar / beam joint of the house must have a pin connection configuration in which the pins are passed through the pin holes provided in both. A seismic damper for a wooden house using the superplastic alloy according to claim 1 or 2.

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