JP3667123B2 - Seismic reinforcement structure for wooden houses - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic reinforcement structure for a wooden house using a viscoelastic damper, and can be easily applied not only to seismic reinforcement of an existing wooden house but also to a newly built wooden house.
[0002]
[Prior art]
In general, a wooden house is reinforced appropriately because it is difficult to make a large rigid joint at the joint portion (joint portion) between the shaft members because it is unavoidable to be greatly deformed during an earthquake.
[0003]
Up to now, as a method of improving the earthquake resistance performance of wooden houses, it is natural to reinforce the joints between the frame members such as pillars with reinforcement hardware, and for example, additional bearing walls by structural plywood and streaks For example, a method for securing the required seismic reinforcement is known.
[0004]
However, in the case of existing houses in particular, it is necessary to carry out the original reinforcement work after removing the existing finished part once, etc., which increases the construction cost, increases the number of construction days, and increases the number of construction days. Is forced to bear a heavy burden.
[0005]
In addition, the earthquake resistance of a building can be improved by adding a load bearing wall. On the other hand, the ease of use of the building changes due to a decrease in the opening and the like, often resulting in a decrease in comfort.
Furthermore, in the case of old buildings such as Shoin architecture and cultural property buildings, there are relatively few walls that will be earthquake-resistant walls, and it is required to maintain the current status as much as possible. Or adding new walls is extremely difficult.
[0006]
In reinforced concrete and steel buildings, large-scale seismic isolation structures using laminated rubber bearings, various passive and active vibration control devices, and vibration control structures have been developed. The seismic reinforcement structure in the same way as such a structure is not realistic because of the scale and the fact that many are private houses.
[0007]
The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a seismic reinforcement structure for a wooden house that can perform the seismic reinforcement of a wooden house very easily and at low cost.
[0008]
[Means for Solving the Problems]
The seismic reinforcement structure for a wooden house according to claim 1 of the present invention is fixed to one joint member constituting the joint part at the joint part which is a joint part of the wooden house members of the wooden house. A right isosceles triangular displacement plate, a right isosceles triangular displacement plate fixed to the other shaft assembly and projecting to the side of the displacement plate, and a gap between the displacement plates is filled A viscoelastic damper made of a viscoelastic body is attached , and the displacement plate is fixed to the shaft assembly with a fixed portion protruding vertically from the end thereof, close to the joint portion, and By utilizing the rotational deformation of the joint portion that sometimes occurs, the displacement plates are rotationally displaced in opposite directions within the displacement plate surface so that the seismic energy is absorbed by the shear deformation of the viscoelastic body. It is characterized by that.
[0009]
According to a second aspect of the present invention, there is provided a seismic reinforcement structure for a wooden house according to the first aspect, in which a plurality of displacement plates are provided for at least one shaft assembly, and the gaps between the displacement plates are filled with viscoelastic bodies.
[0010]
A seismic reinforcement structure for a wooden house according to claim 3 is characterized in that, in claim 1 or 2, the viscoelastic body is prefilled in a gap between the displacement plates at a factory or the like.
A seismic reinforcement structure for a wooden house according to claim 4 is the structure according to claim 1, 2 or 3, wherein the viscoelastic damper is formed by sticking a viscoelastic body formed in a sheet shape between displacement plates, or a fluid state. A viscoelastic body is filled between the displacement plates.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 of the Invention
1 and 2 show an embodiment of the present invention. In the figure, one shaft assembly material (hereinafter referred to as “column”) 1 and the other shaft assembly material (hereinafter referred to as “beam”) constituting the shaft assembly of a wooden house. The viscoelastic damper 3 is attached to one or several joints (joints) with 2).
[0012]
The column 1 and the beam 2 are joined mainly by a conventional construction method in which both joint portions are processed and fitted, and are reinforced with reinforcement hardware (not shown) as necessary.
The viscoelastic damper 3 is configured by filling a predetermined amount of viscoelastic body 6 in a gap between the displacement plate 4 fixed to the side surface portion of the column 1 and the displacement plate 5 fixed to the lower surface portion of the beam 2. ing.
[0013]
Displacement plate 4 and 5 are both formed to the right-angled isosceles triangle shaped allow installation better fit like a steel plate in the joint, vertically especially along the side of the column 1 on one end side of the displacement plate 4 A protruding fixing portion 4 a is provided on the upper end side of the displacement plate 5, and a fixing portion 5 a protruding vertically along the lower surface of the beam 2 is provided.
[0014]
The fixing portions 4a and 5a are formed, for example, by bending a part of the displacement plate 4 and a part of the displacement plate 5 vertically.
The displacement plate 4 formed in this way is projected on the side surface of the column 1 by fastening the fixing portion 4a with a plurality of nail members 7, and the displacement plate 5 has a fixing portion 5a on the bottom surface of the beam 2 with a plurality of nail members. 7 and projecting to the side of the displacement plate 4.
[0015]
At that time, the displacement plates 4 and 5 overlap in parallel and have a predetermined gap between the displacement plates 4 and 5.
As the viscoelastic body 6, various blended materials are used which are made of a polymer material such as acrylic, silicon, asphalt or rubber.
[0016]
Further, the viscoelastic body 6 is integrally filled with the displacement plates 4 and 5 in the gap between the displacement plates 4 and 5.
At this time, the viscoelastic body 6 is filled in the gap between the displacement plates 4 and 5 in advance at the factory or after the displacement plates 4 and 5 are installed on site.
[0017]
Further, the viscoelastic body 6 is filled by sticking a sheet-like material in the gap between the displacement plates 4 and 5 or by pouring a fluid material.
The viscoelastic body 6 has a great degree of freedom in terms of structure and shape, and can easily manufacture viscoelastic dampers in various forms.
[0018]
In addition, since the viscoelastic body 6 can effectively absorb energy from a minute deformation to a large deformation, it is possible to control not only the earthquake load but also the wind load.
[0019]
In such a configuration, the joint portion (joint portion) between the pillar 1 and the beam 2 is not completely rigid joint unlike the reinforced concrete or steel structure pillar / beam joint portion, so that it is greatly deformed during an earthquake.
[0020]
Therefore, during the earthquake, the displacement plates 4 and 5 receive the seismic force and are rotationally displaced in the opposite directions within the displacement plates 4 and 5, and the viscoelastic body 6 undergoes shear deformation to absorb the seismic energy. This increases the earthquake resistance of the wooden house.
[0021]
In the above description, the case where the viscoelastic tamper 3 is particularly attached to the joint portion between the column 1 and the beam 2 has been described. For example, as illustrated in FIGS. Seismic reinforcement of wooden houses by attaching viscoelastic dampers 3 at several locations of the joints between the main frame members that make up the wooden frame, such as the connection between the column and the foundation, or the connection between the beam and the beam It can be performed.
[0022]
Moreover, when attaching the viscoelastic damper 3 to a joint part, even if the positional relationship of the displacement plates 4 and 5 becomes reverse, the seismic reinforcement performance is the same. Embodiment 2 of the Invention 3 (a) and 3 (b) show another embodiment of the present invention. In the figure, two displacement plates 4 fasten the fixed portion 4a to the side surface portion of the pillar 1 with a plurality of nail members 7. FIG. By projecting. Each gap between the two displacement plates 4 and the displacement plate 5 is filled with a viscoelastic body 6.
[0023]
Accordingly, the two displacement plates 4 overlap the displacement plates 5 on both sides of the displacement plate 5 and have predetermined gaps between the displacement plates 5 and the displacement plates 4 on both sides, respectively. Are filled respectively.
[0024]
The fixed portion 5a of the displacement plate 5 is formed by welding a separately formed member to the upper end portion of the displacement plate 5 or the like. Other parts are substantially the same as those described with reference to FIGS.
[0025]
By being configured in this way, the portion of the viscoelastic body 6 that undergoes shear deformation at the time of an earthquake becomes a considerably wide area, so that the seismic performance of the wooden house is further enhanced.
Embodiment 3 of the Invention
4 (a) and 4 (b) show another embodiment of the present invention, and in particular, a plurality of displacement plates 4 and 5 are provided in a projecting manner, and the displacement plates 4 and 5 are alternately stacked, Predetermined gaps are provided between the displacement plate 4 and the displacement plate 5, respectively, and the gaps are filled with viscoelastic bodies 6, respectively.
[0026]
In addition, the plurality of displacement plates 4 and 5 are fastened with a plurality of nail members 7 with a common fixed portion 4 a formed integrally on the side surface portion of the column 1 and the fixed portion 5 a on the lower surface portion of the beam 2. Thus, the projections are respectively provided at the joints between the column 1 and the beam 2. Other parts are substantially the same as those described with reference to FIGS.
[0027]
With this configuration, the portion of the viscoelastic body 6 that undergoes shear deformation during an earthquake has a larger area, so that the earthquake resistance of the wooden house can be further enhanced.
[0028]
【The invention's effect】
The present invention has the above-described configuration, and particularly when the viscoelastic body having a stable seismic energy absorption capability from a small amplitude to a large amplitude undergoes shear deformation, the seismic energy is absorbed at the joint of the wooden frame during an earthquake, This significantly increases the earthquake resistance of the wooden house.
[0029]
Moreover, viscoelastic dampers side of the displacement plate and displacement plate that will be projected fixed to one framing material constituting the joint, fixed to the other framework member constituting the joint It is possible to make it extremely lightweight and compact because it is configured by filling the gap with the displacement plate projecting on the plate, and therefore it is not necessary to set the exact installation position. It fits in the joint between the shaft assemblies and can be attached well.
[0030]
In particular, even when an existing wooden house is retrofitted with seismic reinforcement, it can be used as a joint between shaft assemblies without the need for extensive construction, such as removing existing finishes or adding new seismic walls. If there is some space, attaching a viscoelastic damper to this part makes it possible to perform seismic reinforcement at an extremely simple and low cost regardless of existing or new construction.
[0031]
This also makes it suitable for seismic reinforcement of existing buildings that have relatively few walls and are required to maintain the status quo as much as possible, such as old buildings such as Shoin architecture and cultural property buildings.
[0032]
In addition, a viscoelastic material in the form of a sheet is affixed between the displacement plates, or a fluidized material is poured and filled, so that the viscoelasticity can be applied between the displacement plates at any place in the factory or on site. The body can be filled very easily.
[Brief description of the drawings]
FIG. 1 shows a partial shaft assembly of a wooden house, (a) is a front view thereof, and (b) is a transverse sectional view thereof.
2A is a partial side view showing a joint portion between a column and a beam, and FIG. 2B is a cross-sectional view taken along the line II in FIG.
3A is a partial side view showing a joint portion between a column and a beam, and FIG. 3B is a cross-sectional view taken along the line II in FIG.
4A is a partial side view showing a joint between a column and a beam, and FIG. 4B is a cross-sectional view taken along the line II in FIG.
[Explanation of symbols]
1 pillar (one shaft material constituting the frame of a wooden house)
2 Beams (the other framing material constituting the framing of the wooden house)
3 Viscoelastic damper 4 Displacement plate 4a Fixed portion 5 Displacement plate 5a Fixed portion 6 Viscoelastic body 7 Nail member

Claims (4)

A right angled isosceles triangle-shaped displacement plate fixedly projected to one shaft assembly constituting the joint , and the other shaft assembly at the joint which is a joint between the shaft assemblies of a wooden house A displacement plate having a right isosceles triangle shape fixed to a material and projecting to the side of the displacement plate, and a viscoelastic damper comprising a viscoelastic body filled in a gap between the displacement plates is attached , The displacement plate is fixed to a shaft assembly with a fixed portion projecting vertically from an end portion of the displacement plate close to the joint portion, and the displacement plate is rotated using the rotational deformation of the joint portion that occurs during an earthquake. A seismic reinforcement structure for a wooden house, characterized in that seismic energy is absorbed by shear deformation of the viscoelastic body by rotationally displacing the plates in opposite directions within the displacement plate surface .   2. A seismic reinforcement structure for a wooden house according to claim 1, wherein a plurality of displacement plates are provided for at least one shaft assembly, and viscoelastic bodies are filled in the gaps between the displacement plates.   The seismic reinforcement structure for a wooden house according to claim 1 or 2, wherein the viscoelastic body is filled in advance in a gap between displacement plates at a factory or the like.   The viscoelastic damper is characterized in that a viscoelastic body formed in a sheet shape is attached between displacement plates, or a fluid viscoelastic body is poured between the displacement plates and filled. Item 1, 2 or 3 Seismic reinforcement structure for wooden houses.

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