JP3778611B2 - Seismic control structure of wooden house - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a basic vibration control structure of a wooden house using a viscoelastic damper.
[0002]
[Background Art and Problems to be Solved by the Invention]
When considering the earthquake resistance of a building, it is most effective not to input the energy of the earthquake to the building, and the seismic isolation structure is currently in the spotlight.
[0003]
Usually, as a seismic isolation device for a large-scale building, a combination of laminated rubber and a damper is used. However, in order to adopt such a seismic isolation device in a wooden house of a private house scale, it takes a lot of space and costs too much, and the weight of the building is too light, and the performance inherent in laminated rubber as an isolator is It cannot be fully demonstrated.
[0004]
The present invention has been made to solve the above-described problems, and an object thereof is to provide a simple and low-cost basic vibration control structure suitable for a wooden house.
[0005]
[Means for Solving the Problems]
Basic Seismic structure of wooden houses of the present invention, between the upper and lower plate-like member, the upper and lower surfaces of the upper and lower respective Nde write sandwiching a viscoelastic body for energy absorption molded into a sheet of plate-like sandwich The viscoelastic body is bonded to the plate-shaped member and the outer peripheral portion of the lower plate-shaped member is bent into a box shape, or a spacer is disposed outside the viscoelastic body. As a whole, a plate-like viscoelastic damper that does not receive compressive force is installed between the foundation and the base of the wooden house.
[0006]
A plate-like viscoelastic damper interposed between the foundation and the foundation absorbs vibration energy and suppresses vibration of wooden houses due to earthquakes or traffic vibrations.
[0007]
The viscoelastic body is made of a polymer material as a raw material and is commercially available in various blends. The viscoelastic body has an elliptic loop hysteresis characteristic as shown in FIG. 3 and a speed-dependent damping characteristic. Further, the structure and shape have a large degree of freedom, and it is possible to easily manufacture viscoelastic dampers in various forms.
[0008]
In addition, it has been confirmed by experiments that the viscoelastic body can effectively absorb energy from minute deformation to large deformation, and even if it breaks once, it will be restored to its original hysteresis characteristics after several hours. The nature is different from other dampers. From these points, viscoelastic dampers are effective for seismic reinforcement of buildings of any structural shape.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 show an embodiment of the basic vibration control structure of the present invention. In a basic part of a general wooden house in which a base 2 is installed on a footing base 1, a base 1 and a base 2 are shown. The viscoelastic damper 3 having the viscoelastic body 6 as a constituent element is installed between the two. The details are set such that a compressive force is not applied to the viscoelastic body 6.
[0010]
FIG. 1 (b) shows a typical form of the viscoelastic damper 3 used in the present invention, in which a viscoelastic body 6 is formed into a plate shape and sandwiched between upper and lower steel plates 4 and 5. Further, in this example, the outer peripheral portion of the lower steel plate 5 is bent and formed into a box shape so that the vertical compression force is not applied to the viscoelastic body 6 whose upper and lower surfaces are bonded to the steel plates 4 and 5, respectively. Yes. The structure to which the compressive force is not applied is not limited to this, and may be a structure in which a spacer is disposed outside the viscoelastic body 6 between the upper and lower steel plates 4 and 5 (in the case of a flat plate).
[0011]
Various designs are possible for the planar shape, thickness, number of installations, and the like of the viscoelastic damper 3, and the viscoelastic dampers 3 are arranged according to the design of the wooden house.
[0012]
In addition, when the viscoelastic damper 3 actually functions, the base 2 moves relative to the base 1. When the base 2 needs to be fixed to the base 1, for example, By interposing a synthetic resin plate with a low coefficient of friction such as made of tetrafluoroethylene between the viscoelastic dampers 3 and filling mortar, etc., it is structured such that the adhesive force can be cut by a horizontal force of a predetermined level or more, In this case, a structure in which the anchor bolt fixing portion for fixing the base 2 to the foundation 1 is used as a loose hole to allow horizontal displacement is conceivable.
[0013]
Thus, in the present invention, a viscoelastic body 6 made of a polymer material as a raw material and a plate-like viscoelastic damper 3 sandwiched between upper and lower plate-like members such as steel plates 4, 5 are used as a base 1 of a wooden house. It is inserted between the bases 2 and the viscoelastic damper 3 is deformed in the event of an earthquake to add damping to the house, absorb the vibration energy, reduce the input energy to the frame, and make the building earthquake resistant・ Vibration-proof performance can be improved.
[0014]
Since this plate-like viscoelastic damper 3 is compact, it does not require a large installation space like a conventional seismic isolation structure using laminated rubber, and uses a small gap between the foundation 1 and the base 2. Can be installed.
[0015]
【The invention's effect】
The viscoelastic damper used in the present invention is a plate-shaped and extremely compact, and a useless space for installation becomes unnecessary. In addition, the viscoelastic damper itself is low in cost, and there is almost no increase in the cost of the building. Therefore, it is optimal when the place is limited and low cost is required, such as a private wooden house.
[0016]
The damper material uses a viscoelastic body with stable energy absorption ability from small amplitude to large amplitude, so it exhibits excellent seismic control function against earthquake motion and traffic vibration with various vibration characteristics.
[Brief description of the drawings]
1A and 1B show an embodiment of a basic vibration control structure of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a front view showing an example of a viscoelastic damper.
FIG. 2 is a vertical sectional view corresponding to the embodiment of FIG.
FIG. 3 is a graph showing hysteresis characteristics of a viscoelastic damper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Footing foundation, 2 ... Base, 3 ... Viscoelastic damper, 4,5 ... Steel plate, 6 ... Viscoelastic body, 7 ... Splitting stone, 8 ... Waste concrete

Claims (1)

Between the upper and lower plate-like member, made by bonding Nde write sandwiching the viscoelastic material for energy absorbing molded into a sheet of plate-like sandwich the upper and lower surfaces thereof to the plate-like member of said upper and lower, respectively, and the lower The plate-like member on the side is bent and molded into a box shape, or a spacer is arranged outside the viscoelastic body so that the viscoelastic body is not compressed and applied as a whole as a plate shape A basic vibration control structure for wooden houses, characterized in that the viscoelastic damper is installed between the foundation and the foundation of the wooden house.

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