JP4317773B2 - Seismic retrofit structure for existing exterior walls - Google Patents

Description

  The present invention relates to a seismic retrofit structure for an existing exterior wall for repairing an existing exterior wall to a house with improved earthquake resistance.

  In general, as a structure to add earthquake resistance to a house, a structural plate or other reinforcing plate is attached to improve the earthquake resistance, or a structural reinforcing plate such as a structural plate is built in the interior by a conventional method. There are earthquake-resistant repair structures that are constructed as earthquake-resistant members for old wooden houses. (For example, refer to Patent Documents 1 to 5).

JP 09-328825 A JP-A-10-338980 JP-A-11-107366 JP 2000-291130 A JP 2003-247289 A

  However, Patent Documents 1 to 3 are structures that are newly constructed to improve the earthquake resistance, sound insulation, and heat insulation by constructing a reinforcing plate, and have not been established as a repair structure. Moreover, although patent document 4, 5 is a structure for adding earthquake resistance to the existing wooden house, it is a structure constructed on the interior material side.

In order to solve such drawbacks, the present invention is to remove a part of the exterior material of the existing wooden house with a width between the center of the main column and the middle column , and to shift in the same direction from the center of the main column and the middle column , and reinforcements on the side surface of the studs peelable been exposed space at the position of half width greater than the width of the exposed main pillars of the main pillar is fixed, the structural surface material is fixed to the exposed space, exterior materials and structural heat insulating material is fixed to the use surface material on, are furring strip on the heat insulating material is fixed, there is provided a retrofitting structure of the existing external wall a new outer package is fixed on furring strips.

  According to the seismic retrofit structure of the existing exterior wall according to the present invention, (1) it is possible to easily improve seismic resistance, heat insulation, airtightness, and the like. (2) It can improve the earthquake resistance, heat insulation, airtightness, etc. of existing wooden houses. (3) The reinforcing material can be formed while leaving the existing exterior material, and the seismic reinforcement can be performed only by disassembling only the portion to be seismically reinforced. (4) Does not require large-scale dismantling. (5) A ventilation structure can be formed. (6) Since the existing exterior wall is partially removed, the properties of the structural housing can be grasped and repaired. (7) It is effective that the bearing walls are arranged on the outer periphery of the building. In particular, it is ideal that the bearing walls are arranged in an L shape at corners such as the protruding corners where the bearing wall lines intersect. It is convenient because the bearing wall can be strengthened when repairing the outer wall. There are features and effects.

  Hereinafter, an earthquake-resistant repair structure for an existing exterior wall according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a construction state of an existing exterior wall seismic retrofit structure according to the present invention, and FIGS. 2A to 2G are cross-sectional views showing a construction sequence. α is an existing housing, and A is an existing exterior wall.

  The existing frame α is composed of the main column 1 and the intermediary column 2, although not shown, a beam, a base, a brace, a torso, a punch, a heat insulating material (for example, glass wool) and the like, and the existing exterior wall A is a dry exterior material (made of metal) Siding, ceramic siding, tile, ALC, etc.). In addition, 3 shown with a dashed-dotted line is interior material, (beta) is space.

  Reference numeral 5 denotes a reinforcing material, and a member as shown in FIG. 7A is formed as shown in FIGS. 2C, 5A, and 5B.

  Reference numeral 6 denotes a structural face material, and a member as shown in FIG. 7B is formed as shown in FIGS. 2D, 6A, and 6B. The structural face material 6 is used for a main part in the structural strength of a building.

  The structural face material 6 is a structural plywood, particle board, structural panel (OSB), hard board, hard wood cement board, gypsum board, gypsum lath board, sizing board (sieving insulation board), rasito, etc. .

An example of the structural face material 6 is a structural plywood, which is a plywood used for a main part in terms of structural strength of a building. Structural plywood class 1 (specialty, class 1) is a plywood used for parts required for the load-bearing structure of buildings such as 2x4 houses (two-by-four). is there. The dimensions are 7.5 to 24 mm in thickness, width = 910 · 1220 mm, etc. (width is arbitrary), length = 1820/2430/2730 mm, etc. (length is arbitrary). The thickness of the veneer is specified, thereby guaranteeing the strength of the plywood. Further, the structural plywood class 2 (special class 1) of the structural plywood is used in the same manner as the first class, but is mainly composed of softwood plywood. The dimensions are thickness = 5.5-24 mm, width = 910/1220 mm, etc. (width is arbitrary), length = 1800/1820 / 2430-2730 mm, etc. (length is arbitrary). It is better to use “special” for the exterior.

  Reference numeral 7 denotes a heat insulating material, and a member as shown in FIG. 7C is formed as shown in FIG.

  Reference numeral 8 denotes a trunk edge, which is formed as shown in FIG.

  9 is a new exterior material, which is formed as shown in FIG.

  The new exterior material 9 is made of a dry exterior material (metal siding, ceramic siding, tile, ALC, or the like). As an example of the new exterior material 9, as shown in FIGS. 8A to 8D, a metal siding material composed of a surface material 10, a back material 11, a core material 12, and a packing material 13 is used.

  Of course, it can also be formed in an existing housing α in which a heat insulating material such as glass wool is formed in the space β.

  Here, the construction method of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention is demonstrated using Fig.2 (a)-(g),-Fig.6 (a), (b). 2 (a), 3 (a), and 3 (b) show an existing exterior wall A that is subjected to seismic retrofitting. First, as shown in FIGS. 2 (b), 4 (a), and 4 (b), the exterior material 4 of the existing exterior wall A portion to be subjected to earthquake-proof repair is removed. At this time, the main pillar 1 and the intermediate pillar 2 are removed by being shifted by a distance t from the central portion. In the figure, the removal width is 910 mm. Of course, the removal width is determined by the structure of the existing housing α and the size of the structural face material 6 and is arbitrary.

By displacing the main pillar 1 and the center pillar 2 from the central portion by a distance t, the structural face material 6 can be reliably fixed. Moreover, seismic reinforcement can be performed by using together with an existing bracing wall (shown in FIG. 9).

Next, as shown in FIG. 2C, FIG. 5A, and FIG. 5B, the reinforcing member 5 is fixed to the side surface of the stud 2 via a fixing tool such as a nail. Thereafter, as shown in FIGS. 2 (d), 6 (a), and 6 (b), the structural face material 6 is fixed to the space β via a fixture such as a nail.

  Next, as shown in FIGS. 2 (e) to 2 (g), the heat insulating material 7, the trunk edge 8 (in this case, the vertical trunk edge), and the new outer wall material 9 are fixed via a fixture such as a nail, and the construction is performed. To complete. Of course, when the new exterior material 9 is vertically stretched, the trunk edge 8 is formed as a horizontal trunk edge.

  What has been described above is only one example of the existing exterior wall seismic retrofit structure according to the present invention, and can also be formed as shown in FIGS. 9 to 10 (a) to (g).

  That is, FIG. 9 to FIG. 10A to FIG. 10G are explanatory views showing a structure for retrofitting the existing housing α on which the brace 1a is formed and a construction method thereof.

  By forming an airtight sheet on the surface or the back of the heat insulating material 7 or forming a tape on the joint, the wall can be airtight.

The outer wall of an already resident house that provides seismic reinforcement for existing houses has holes in the outer wall surface, such as an air conditioner, a bathtub, and a stove. In addition, the roof of the bay window and the window ridge protrude from the left and right pillars on both sides, or the column interval is 4.5 metric, the column interval is 3 metric, and one side is the corner. The case is not uncommon. For this reason, when a seismic reinforcement is applied to an existing outer wall using a 3 × 9 plate bearing wall, a bearing wall such as a structural wall cannot be directly applied to a wall surface with a 3 or 6 column spacing. There are many cases. In such a case, the existing exterior wall seismic retrofit structure according to the present invention, which is seismically reinforced using the three-side wall of the one side column and the other side column, is very useful.

It is explanatory drawing which shows a typical example of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the construction order of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the construction order of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the construction order of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the construction order of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the construction order of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows a typical example of the member used for the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows a typical example of the member used for the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the other Example of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention. It is explanatory drawing which shows the other Example of the earthquake-proof repair structure of the existing exterior wall which concerns on this invention.

Explanation of symbols

α Existing frame β Space A Existing exterior wall 1 Main pillar 1a Brace 2 Spacer 3 Interior material 4 Exterior material 5 Reinforcement material 6 Structural surface material 7 Thermal insulation material 8 Body edge 9 New exterior material 10 Surface material 11 Back surface material 12 Core material 13 Packing material

Claims (1)

A part of the exterior material of the existing wooden house is peeled off with the width between the center of the main column and the inter-column , shifted from the center of the main column and the inter- column in the same direction, and the exposure of the main column is 1/2 of the width of the main column reinforcement is fixed to the side surface of the studs of the exposed space that is peeled off at the position of larger width, structural surface material is fixed to the exposed space, the heat insulating material is fixed to the exterior material and the structural face material on, insulation A seismic retrofitting structure for an existing exterior wall, characterized in that the body edge is fixed on the top and a new exterior material is fixed on the body edge.

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