JP4098334B2 - Seismic reinforcement method and seismic reinforcement structure for buildings - Google Patents

Description

  The present invention relates to a seismic reinforcement method and a seismic reinforcement structure for a building, and is capable of easily securing a necessary amount of walls without performing construction to a foundation when seismically reinforcing a newly built or existing wooden house. .

  In particular, as a method of seismic reinforcement of existing wooden houses, in addition to increasing the rigidity of each joint by placing fire striking materials and streaks on the floor assembly and the shaft assembly, respectively, a method of newly arranging walls is generally performed. In particular, a method of increasing the amount of walls by newly arranging walls is regarded as an effective seismic reinforcement method.

JP 2002-356908 A JP 2005-213905 A JP-A-9-302814

  However, when installing a new wall, the lower end of the wall has been fixed to the foundation through the foundation so far, it is necessary to newly fix the foundation under the wall to the foundation, and in places where there is no existing foundation However, since it is necessary to provide a new foundation, not only the construction becomes large-scale, but also there are problems such that both the cost and the construction period are significantly increased.

  The present invention has been made in order to solve the above problems, and provides a seismic reinforcing method and a seismic reinforcing structure for a building, which can easily and easily perform seismic reinforcement of new and existing wooden houses at a low cost and in a short construction period. The purpose is to provide.

  The seismic reinforcement method according to claim 1 is composed of a base, a beam installed above the base, and a seismic panel installed between the beam and the base, and an upper end portion of the seismic panel is It is fixed to the beam, and the lower end is placed on the base in a state where the edge is cut off from the base.

  According to the present invention, when an earthquake-resistant panel is provided between a foundation and a beam and the earthquake-proof reinforcement is provided, a pull-out force is not generated on the foundation particularly by providing the earthquake-resistant panel. In this way, there is no need to fix the foundation to the foundation in preparation for pulling out, and there is no need to install a new foundation, so earthquake-proof reinforcement by installing walls is easy, low cost, and in a short construction period Can be especially suitable for renovating existing wooden houses.

  In this case, the earthquake-resistant panel is installed in the center of the frame in principle. However, since it may overlap with the position of an opening such as an entrance or a window, it does not necessarily have to be provided in the center of the frame. For example, a plurality may be provided symmetrically on both sides of the opening provided in the center of the frame.

  The seismic reinforcement method for a building according to claim 2 is characterized in that in the seismic reinforcement method according to claim 1, a lateral slip prevention means for preventing lateral displacement of the seismic panel is provided on the base.

  In particular, the present invention can cope with the horizontal shearing force acting between the base and the seismic panel, and it can cope with the horizontal shearing force in both positive and negative directions by being installed on both sides of the seismic panel. . In this case, the lateral slip prevention means can be made of the same material as the base.

  The seismic reinforcement method for buildings according to claim 3 is the seismic reinforcement method according to claim 1 or 2, wherein a reinforcing portion for reinforcing the joint portion between the seismic panel and the beam is provided at the upper end of the seismic panel. It is characterized by.

  In the present invention, since the lower end portion of the earthquake-resistant panel can be rotationally displaced, it is predicted that a large bending stress will be generated at the upper end portion of the earthquake-resistant panel. Therefore, the earthquake-resistant panel and the beam are prepared for this bending stress. This increases the rigidity of the joint and beam. In this case, the reinforcing portion may have the same structure as the earthquake resistant panel.

  The seismic reinforcement method for a building according to claim 4 is the seismic reinforcement method for a building according to any one of claims 1 to 3, wherein the bundling material is provided below the foundation in correspondence with a position serving as a fulcrum of rotational displacement of the seismic panel. It is characterized by providing. In the present invention, it is predicted that an axial compression force will act on a position that becomes a fulcrum of the rotational displacement of the earthquake resistant panel. A bundle is provided under the base.

  The earthquake-proof reinforcement structure for a building according to claim 5 is composed of a base, a beam installed above the base, and an earthquake-resistant panel installed between the beam and the base, and an upper end portion of the earthquake-resistant panel is Fixed to the beam, the lower end is placed on the base in a state where the edge of the base is cut off, a lateral slip prevention means for preventing lateral displacement of the seismic panel is provided on the base, and the seismic resistance The upper end portion of the panel is provided with a reinforcing portion that reinforces the joint portion between the earthquake-resistant panel and the beam.

  In the present invention, when an earthquake-resistant panel is provided between the foundation and the beam and the earthquake-proof reinforcement is performed, the foundation is prepared for the extraction force by providing the earthquake-resistant panel so that no extraction force is generated on the foundation. There is no need to fix to the wall, and it is not necessary to provide a new foundation. Therefore, there is an effect that the seismic reinforcement by installing the wall can be easily performed at low cost and in a short construction period.

  FIGS. 1A and 1B show an example of the present invention. In the figure, an earthquake-resistant panel 2 is arranged at substantially the center of the frame 1. The frame 1 is formed in a rectangular frame shape from a base 3, columns 4, 4 built at both ends of the base 3, and beams 5 bridged between the upper ends of the columns 4, 4. In this case, the base 3 and the beam 5 and the column 4 are joined by a tenon consisting of a tenon and a tenon hole, and are deformed to some extent by a horizontal external force in the in-plane direction.

  The earthquake-resistant panel 2 includes a base 6 installed between the base 3 of the frame 1 and the beam 5, a base 7 installed on the base 3 between the lower ends of the pillars 6 and 6, and the base 7 and the beam 5 and the load bearing plates 9 and 9 attached to both sides of the shaft assembly composed of these members are formed in a vertically long rectangular plate shape.

  Further, the upper end portion of the earthquake-resistant panel 2 configured as described above is fixed to the beam 5 so as not to rotate or displace with respect to the beam 5. In this case, the upper ends of the columns 6 and 6 are joined to the beam 5 by a tenon consisting of a tenon and a tenon hole, and further joined by tie bolts 10 and 10. Further, the upper end portions of the load bearing plates 9 and 9 are respectively attached to both side portions of the beam 5 and joined to the beam 5 by nailing.

  On the other hand, the lower end portion of the earthquake-resistant panel 2 is placed in a state where it is not fixed on the foundation 3, and the lateral slip prevention foundations 11 and 11 are respectively attached to the foundations 3 on both sides of the earthquake-resistant panel 2. Further, the lower end portions 9 a and 9 a of the load bearing plates 9 and 9 extend to the side portion of the base 3. The lateral slip prevention base 11 is fixed to the base 3 by a plurality of fixing brackets 12 and 12.

  The base 3, the pillar 4, the beam 5, the pillar 6, the base 7, and the interposition pillar 8 are made of woody timber such as cedar and pine, and the load bearing 9 is made of structural plywood. The load bearing plate 9 also serves as a wall base material. Further, the pillar 4 may be used as the pillar 6 of the earthquake-resistant panel 2.

  With the above configuration, the lower end portion of the earthquake-resistant panel 2 is rotationally displaced with one end side as a fulcrum, but is restrained so as not to move in the axial direction and the axis perpendicular direction of the base 3, while the upper end portion of the earthquake-resistant panel 2 is The beam 5 is fixed so as not to be rotationally displaced or moved with respect to the beam 5.

  In such a configuration, the frame 1 is displaced in the direction in which the horizontal external force P is applied to the horizontal external force P acting on the frame 1, but at the same time, the earthquake resistant panel 2 is rotated by the beam 5 at the upper end of the earthquake resistant panel 2. By being constrained so as not to be displaced, it resists the horizontal external force P, and as shown in FIG. Prevent shape deformation. Therefore, the earthquake resistance of the frame 1 can be maintained.

  In this case, since the pulling force does not act particularly between the earthquake-resistant panel 2 and the base 3, it is not necessary to dare to fix the base 3 to the foundation, and it is not necessary to dare to provide a new base to fix the base 3. .

  In addition, when there is no existing foundation under the base 3, the bundles 13 and 13 are installed as needed on the lower side of the base 3 corresponding to the position to be the rotation fulcrum of the earthquake-resistant panel 2. Yes.

  FIG. 3 (a) shows another example of the present invention, and in particular, stiffening portions 14 and 14 are formed on both sides of the seismic panel 2 in order to increase the rigidity of the joint between the seismic panel 2 and the beam 5, respectively. Has been.

  The stiffening portion 14 includes a bundle member 15 suspended from the beam 5, a beam 16 bridged between the lower end portion of the bundle member 15 and the column 6, and a load bearing plate 17 on both sides of a shaft assembly made of these members. It is comprised by attaching.

  FIG. 3B also shows another example of the present invention, in which the plurality of earthquake-resistant panels 2 described above are arranged in the frame 1.

An example of the earthquake-proof reinforcement structure of a building is shown, (a) is a front view, (b) is a II line sectional view in (a). It is a front view of the earthquake-resistant panel lower end part which shows the behavior of an earthquake-resistant panel when a horizontal external force acts. (A), (b) is a front view which shows the other example of the earthquake-proof reinforcement structure of a building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Seismic panel 3 Base 4 Column 5 Beam 6 Column 7 Base 8 Space column 9 Load bearing plate 10 Tie bolt 11 Slip prevention base (Slip prevention base)
12 Fixing bracket 13 Bundle material 14 Reinforcement part 15 Bundle material 16 Beam 17 Load bearing plate

Claims (5)

  A base, a beam installed above the base, and an earthquake-resistant panel installed between the beam and the base, the upper end of the earthquake-resistant panel is fixed to the beam, and the lower end is the base A method for seismic reinforcement of a building, characterized in that it is placed on the base with the base cut off.   2. The method for seismic reinforcement of a building according to claim 1, wherein a lateral slip prevention means for preventing lateral displacement of the seismic panel is provided on the base.   The method for reinforcing earthquakes according to claim 1 or 2, wherein a reinforcing part for reinforcing a joint part between the earthquake resistant panel and the beam is provided at an upper end part of the earthquake resistant panel.   4. The method for seismic reinforcement of a building according to any one of claims 1 to 3, wherein a bundle material is provided under the base in correspondence with a position serving as a fulcrum of rotational displacement of the seismic panel.   A base, a beam installed above the base, and an earthquake-resistant panel installed between the beam and the base, the upper end of the earthquake-resistant panel being fixed to the beam, and the lower end of the base of the base It is placed on the base in a state where the edge is cut off, and a lateral slip prevention means for preventing lateral displacement of the seismic panel is provided on the base, and the seismic panel and the beam are provided at the upper end of the seismic panel. An anti-seismic reinforcement structure for a building, characterized in that a reinforcing part is provided to reinforce the joint part.

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