JP6223020B2 - Opening reinforcement structure and construction method thereof - Google Patents

Description

The present invention relates to a building opening reinforcement structure and a construction method thereof .

  2. Description of the Related Art Conventionally, an opening in a wooden building has a frame-like frame on the inner periphery of a column and a beam surrounding the opening, for example, by placing a tall horizontal member over the opening (see, for example, Patent Document 1). It is reinforced by attaching a member (see, for example, Patent Document 2).

JP 2010-248859 A JP-A-2005-76450

  In recent years, in order to ensure an evacuation passage in the event of an earthquake, high reinforcement performance of the opening is required. However, in the conventional reinforcing structure, since the reinforcing member is provided in the wall surface, the provided reinforcing material is limited. As a result, there is a problem that the required reinforcing performance may not be exhibited. Moreover, it is difficult to reinforce the opening of an existing building with the conventional reinforcing structure.

  By the way, as a structure to reinforce the wall in the wooden building, there was one that fixes a reinforcing member formed by providing a brace inside the frame-shaped frame member to the outside of the wall (see Japanese Patent No. 3343647). This structure did not fix the opening.

Accordingly, the present invention has been made to solve the above-described problem, and provides an opening reinforcement structure that can obtain high reinforcement performance in an opening and can be easily applied to an existing building, and a construction method thereof. The issue is to provide.

The invention according to claim 1 for solving the above-described problem includes a gate-shaped reinforcing member for reinforcing an opening of an outer wall of a building to secure an escape passage during an earthquake , and the reinforcing member includes the opening. Comprising a pair of column structures standing along the section, and a beam structure connecting the upper portions of these column structures, the column structure comprising a pair of vertical chord members extending in the vertical direction; And a truss column comprising a plurality of diagonal members spanned between the vertical chord members, and the beam structure includes a pair of horizontal chord members extending in the lateral direction and the cross chord members It has a truss beam comprising a plurality of diagonal members spanned, and the upper end portion of the columnar structure is fixed to the outer wall from the outside, and is an opening reinforcing structure.

  According to such a configuration, the opening is surrounded by the reinforcing member in which the truss column and the truss beam are combined in a gate shape, so that the opening is greatly reinforced. Therefore, it is possible to ensure an evacuation passage in the event of an earthquake. Furthermore, since the reinforcing member is provided outside the outer wall, it is not necessary to peel off the outer wall material, and it can be easily applied to existing buildings.

The invention according to claim 2 is characterized in that the pair of horizontal chord members of the beam structure are arranged with a gap in the horizontal direction .

  According to a third aspect of the present invention, an L-shaped connection bracket in plan view is connected to the upper portions of the first truss column and the second truss column, and the connection bracket is connected to a beam provided at the upper portion of the opening. Thus, the reinforcing member is fixed to the outer wall. According to such a configuration, since the first truss column and the second truss column are integrally fixed to the outer wall, the reinforcement performance of the opening can be further enhanced.

  The invention according to claim 4 is characterized in that the vertical chord member, the diagonal member and the horizontal chord member are formed of a round pipe. According to such a configuration, by using the round pipe, the stress does not act locally, and the rigidity is constant regardless of the direction of the stress on the outer peripheral surface. Therefore, it is possible to reduce the thickness of the column structure and the beam structure at the same time.

  According to a fifth aspect of the present invention, a slit is formed at an end of the diagonal member, a gusset plate is provided on the longitudinal chord member and the transverse chord member, and the gusset plate is inserted into the slit. The diagonal member is joined to the longitudinal chord member or the transverse chord member by welding. According to such a configuration, the welding length can be ensured and the fixing strength can be increased.

The invention according to claim 6 is characterized in that lower portions of the pillar structures are connected by a foundation, and the reinforcing member and the foundation are combined to form a frame shape. According to such a configuration, since the reinforcing member and the foundation are integrated, the reinforcing performance can be further enhanced.
The invention according to claim 7 is a construction method of an opening reinforcing structure for reinforcing an opening of an outer wall of a building by using a gate-shaped reinforcing member to secure an escape passage at the time of an earthquake. The member includes a pair of column structures standing along the opening, and a beam structure connecting the upper portions of the column structures, and the column structures extend in a vertical direction. A truss column comprising a plurality of slant members spanned between the string members, and the beam structure includes a pair of transverse chord members extending in the lateral direction, and It has a truss beam provided with a plurality of diagonal members bridged between the horizontal chord members, and the upper end portion of the column structure is fixed to the outer wall from the outside.

  According to the pillar structure according to the present invention, it is possible to obtain a high reinforcing performance in the opening and to exhibit an excellent effect that it can be easily applied to an existing building.

It is the perspective view which showed the opening part reinforcement structure which concerns on embodiment of this invention. It is the whole perspective view showing the building which provided the opening part reinforcement structure concerning the embodiment of the present invention. It is the front view which showed the opening part reinforcement structure which concerns on embodiment of this invention. It is the top view which showed the opening part reinforcement structure which concerns on embodiment of this invention. It is the partial cross section front view which showed the column structure. It is the sectional view on the AA line of FIG. It is the disassembled perspective view which showed the diagonal material and the gusset plate. (A) is the B arrow directional view of FIG. 5, (b) is CC sectional view taken on the line of FIG. It is the fragmentary perspective view which showed the building which provided the opening part reinforcement structure which concerns on other embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, the case where the opening reinforcing structure is applied to a wooden building will be described as an example. In addition, it is not the meaning which limits the application range of this opening part reinforcement structure to a wooden building.

  As shown in FIG. 1, the opening part reinforcement structure 1 which concerns on this embodiment is provided with the gate-shaped reinforcement member 4 which reinforces the opening part 3 of the outer wall 2 of a building. The reinforcing member 4 is provided outside the outer wall 2 so as to surround the opening 3. The reinforcing member 4 includes a pair of columnar structures 10 disposed on both sides of the opening 3 and a beam structure 20 that connects the upper portions of the columnar structures 10. As shown in FIG. 2, the reinforcement member 4 is provided in the opening part 3 of the outer wall 2 of all four surfaces of a building.

  As shown in FIGS. 1 and 3, the column structure 10 includes a pair of vertical chord members 11, 11 extending in the vertical direction, and a plurality of diagonal members 12 spanned between the vertical chord members 11, 11. 12. A truss column 14 is provided that includes horizontal members 13 and 13 spanned between the vertical chord members 11 and 11 at the upper and lower ends of the vertical chord member 11. The upper end portion of the column structure 1 is connected to a beam 2a (see FIG. 6A) inside the outer wall 2 via a connecting bracket 15 described later. The lower end of the column structure 1 is fixed to a foundation 6 connected to a building foundation 5 of a building.

  The vertical chord 11 is composed of a steel round pipe and is arranged vertically. The round pipe can improve the corrosion resistance, for example, by using a pipe for scaffolding whose inner and outer surfaces are plated. The pair of vertical chord members 11, 11 are arranged in parallel to each other. As shown also in the upper part of FIGS. 5 and 6, the upper end of the string material 11 is welded to the connecting bracket 15. The connection bracket 15 is made of an angle material having an L-shaped cross section, and the upper end surface of the vertical chord material 11 is welded to the bottom surface. As shown in the lower part of FIGS. A base plate 16 is welded to the lower end of the vertical chord member 11. The base plate 16 is placed on the foundation 6 via a height adjusting mortar 17 and fixed to the foundation 6 with anchor bolts B1 and nuts N.

  As shown in FIG. 3, FIG. 5 and FIG. Welded. A plurality of gusset plates 18 are provided, and are provided at the attachment positions of the diagonal member 12 or the horizontal member 13, respectively. Of the plurality of gusset plates 18, one diagonal member 12 and horizontal member 13 are joined to one of the gusset plates 18 arranged at the upper end and the lower end, and one horizontal member 13 is joined to the other. (See FIGS. 5 and 6). Two diagonal members 12 are joined to the gusset plate 18 disposed between the upper and lower gusset plates 18 (see FIG. 3). The gusset plate 18 extends along the longitudinal direction of the vertical chord member 11 and extends in the normal direction of the outer peripheral surface. The gusset plate 18 has a rectangular shape, and has a height dimension (vertical length) and a protruding dimension (horizontal length) at which the diagonal member 12 and the horizontal member 13 to be attached can be joined.

  As shown in FIG. 7, the diagonal member 12 and the horizontal member 13 are formed of steel round pipes in the same manner as the vertical chord member 11. As shown in FIG. 7, slits 19 are formed at both ends of the diagonal member 12 and the horizontal member 13 (only the diagonal member 12 is shown in FIG. 7). The slit 19 is a portion through which the gusset plate 18 is inserted, and has a width dimension (a dimension slightly larger than the thickness dimension of the gusset plate 18) through which the gusset plate 18 can be inserted. The slits 19 are formed at two locations facing each other at the outer peripheral edge of the end of the round pipe. The slits 19 are positioned on the upper and lower sides of the outer peripheral edge with the diagonal member 12 and the horizontal member 13 attached to the gusset plate 18.

  As shown in FIGS. 5 and 6, the diagonal member 12 and the horizontal member 13 are portions in which the inner peripheral surface of the slit 19 and the surface of the gusset plate 18 are brought into contact with each other by inserting the gusset plate 18 through the slits 19 and 19. Is welded to the gusset plate 18. Welding is performed over the entire circumference of the inner circumferential surface of the slit 19.

  As shown in FIG. 1, FIG. 4, and FIG. 8A, the column structure 10 includes a first truss column 14 a arranged in parallel to the outer wall 2 and a second truss arranged orthogonal to the outer wall 2. It has a column 14b and has an L shape in plan view. That is, the truss column 14 is composed of the first truss column 14a and the second truss column 14b, and the first truss column 14a and the second truss column 14b are arranged orthogonal to each other. The second truss column 14b is connected to the opening 3 side end of the first truss column 14a. The string member 11 at the connecting portion between the first truss column 14a and the second truss column 14b is shared, and gusset plates 18 are provided on two side surfaces of the one string member 11.

  As shown in FIG. 8A, the connecting bracket 15 provided at the upper end of the vertical chord member 11 is formed in an L shape in plan view, and is perpendicular to the outer wall 2 and the angle member 15 a parallel to the outer wall 2. The angle material 15b is combined. The upper end portion of the first truss column 14a is welded to the bottom surface of the angle member 15a, and the upper end portion of the second truss column 14b is welded to the bottom surface of the angle member 15b. The rising portion of the angle member 15 a parallel to the outer wall 2 is in contact with the surface of the outer wall 2. The connecting bracket 15 is fixed to the outer wall 2 by connecting the angle member 15a to the beam 2a inside the outer wall 2 via the long bolt B1 and the nut N. Specifically, the long bolt B2 is inserted into the rising portion of the angle member 15a, the surface material of the outer wall 2 and the beam 2a, and the connection bracket 15 is fixed to the outer wall 2 by tightening with a nut N from the outside. A plurality of long bolts B2 and nuts N are provided at a predetermined pitch in the longitudinal direction of the beam 2a. Note that the rising portion of the angle member 15 b orthogonal to the outer wall 2 faces the other truss column 14.

  As shown in FIGS. 1, 4, and 8 (a), the beam structure 20 includes a pair of horizontal chord members 21, 21 extending in the horizontal and vertical directions, and a bridge between the horizontal chord members 21, 21. It is composed of a truss beam 24 comprising a plurality of diagonal members 22, 22... And horizontal members 23, 23 spanned between the horizontal chord members 21, 21 at both ends of the horizontal chord member 21. Yes. Both ends of the beam structure 20 are connected to the connecting bracket 15 at the upper end of the column structure 10 located on both sides of the opening.

  The horizontal chord material 21 is composed of a round pipe made of steel similar to the vertical chord material 11, and is arranged horizontally. The pair of horizontal chord members 21 and 21 are arranged in parallel to each other. A base plate 26 is welded to the end of the horizontal chord member 21 (see FIGS. 4 and 8A). The base plate 26 is in contact with the surface of the rising portion of the angle member 15 b orthogonal to the wall surface 2 of the connection bracket 15 and is fixed by bolts B 3 and nuts N.

  Gusset plates 28 for joining the horizontal chord material 21 and the diagonal material 22 or the horizontal material 23 are welded to the outer peripheral surfaces of the horizontal chord materials 21 and 21 facing each other. The gusset plate 28 has the same shape as the gusset plate 18 of the truss column 14 and is provided at the attachment position of the diagonal member 22 or the horizontal member 23, respectively.

  The diagonal member 22 is formed of a steel round pipe similar to the diagonal member 12 of the truss column 14 and has the same shape as the diagonal member 12. Further, the horizontal member 23 is formed of a steel round pipe similar to the horizontal member 13 of the truss column 14 and has the same shape as the horizontal member 13. The diagonal material 22 and the horizontal material 23 are also formed with slits 29.

  The diagonal member 22 and the horizontal member 23 are formed by inserting a gusset plate 28 through a slit 29 (see FIG. 1) and welding a portion where the inner peripheral surface of the slit 29 and the surface of the gusset plate 28 are attached to each other. It is joined to the plate 28. Welding is performed over the entire circumference of the inner circumferential surface of the slit 29.

  As shown in FIGS. 1 and 3, the foundation 6 provided at the lower part of the gate-shaped reinforcing member 4 is integrated with the building foundation 5 of the building by a post-construction anchor or the like, and projects to the outside of the building. ing. The foundation 6 extends from the lower part of one pillar structure 10 to the lower part of the other pillar structure 10, and has a frame shape surrounding the opening 3 by combining the reinforcing member 4 and the foundation 6. Both end portions of the foundation 6 are portions that support the first truss column 14 a and the second truss column 14 b, and are disposed perpendicular to the outer wall 2 and parallel support portions 6 a that are disposed in parallel to the outer wall 2. It is formed in an L shape in plan view with the orthogonal support portion 6b. The portions located between the orthogonal support portions 6 b and 6 b at both ends of the foundation 6 are formed in a step shape, and a staircase 7 connected to the opening 3 is configured.

  According to the opening reinforcing structure 1 having the above-described configuration, the opening 3 is surrounded by the gate-shaped reinforcing member 4 including the column structures 10 and 10 and the beam structure 20. Reinforced, deformation of the outer wall 2 around the opening 3 can be suppressed. Thereby, the collapse and deformation of the opening 3 can be prevented at the time of an earthquake, so that an evacuation passage can be secured.

  Moreover, since the column structure 10 is provided with the 1st truss column 14a and the 2nd truss column 14b, and is exhibiting planar shape L shape, it can oppose two horizontal directions. Thereby, the reinforcement performance of the opening part 3 can be improved further.

  Further, since the vertical chord member 11, the diagonal member 12, and the horizontal member 13 are formed of round pipes, stress is not locally applied unlike square pipes and H-shaped steels, and in which direction of the outer peripheral surface Since the rigidity is constant even if stress is applied, there is no portion where the plate thickness becomes thicker than necessary. Therefore, each member can be set to the minimum necessary plate thickness, and the column structure 10 can be reduced in weight and increased in rigidity at the same time. Further, since the horizontal chord member 21, the diagonal member 22 and the horizontal member 23 are also constituted by round pipes, the same operational effects can be obtained, and the beam structure 20 can be reduced in weight and increased in rigidity at the same time. Thereby, the weight reduction and high rigidity of the entire reinforcing member 4 can be achieved at the same time.

  In addition, a slit 19 is formed at the ends of the diagonal member 12 and the horizontal member 13, and the gusset plate 18 attached to the vertical chord member 11 is inserted into the slit 19 and welded. Can be secured. Thereby, the fixing strength of the diagonal member 12, the horizontal member 13, and the vertical chord member 11 can be increased. Further, the fixing strength can be similarly increased with respect to the diagonal member 22, the horizontal member 23, and the horizontal chord member 21.

Furthermore, in this embodiment, since the reinforcing member 4 and the foundation 6 surround the entire periphery of the opening 3, the reinforcing performance of the opening reinforcing structure 1 can be further enhanced.
According to the opening portion reinforcing structure 1, since the reinforcing member 4 is provided on the outer side of the outer wall 2, it is not necessary to peel off the outer wall material. Since the reinforcing member 4 is fixed only by fixing the leg part of the column structure 10 on the foundation 6 and fixing the upper end part of the column structure 10 to the beam, it can be easily applied to existing buildings. be able to.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the said embodiment, although the vertical chord material 11 and the horizontal chord material 21 are comprised with the steel pipe, it is not limited to this, For example, if it has required rigidity, H-shaped steel etc. Other shape steel shapes may be used.

  Moreover, in the said embodiment, although the reinforcement member 4 is provided so that the opening part 3 may be enclosed, it is not limited to this. The reinforcing member 4 may be disposed on the front surface of the opening 3 as long as it has a width as an escape passage (encloses a part of the opening 3). For example, the configuration is as shown in FIG. The reinforcing member 4 is provided outside the opening 3 having a long width, but the column structures 10 and 10 are disposed on the front surface of the opening 3. The upper end portion of the reinforcing member 4 is connected to a beam (not shown) inside the outer wall 2 as in the above embodiment. In the opening reinforcing structure having the above-described configuration, the same function and effect as in the above embodiment can be obtained. Further, the reinforcing member 4 blocks a part of the opening 3, but the truss pillar 14 passes through the front surface of the opening 3, so that the line of sight is good and the flow of the wind is not obstructed. .

  Furthermore, in the said embodiment, although the intermediate part of the foundation 6 is formed in the step shape, the shape is not limited to a step shape. Further, the foundation 6 does not have to extend between the pair of column structures 10, 10, and extends from the building foundation 5 to the lower part of the column structure 10 (only the parallel support portion 6 a and the orthogonal support portion 6 b are provided). The structure which connects the column structures 10 and 10 via the building foundation 5 may be sufficient. Even with such a configuration, the reinforcing member 4, the building foundation 5, and the foundation 6 surround the entire periphery of the opening 3, so that the reinforcing performance of the opening reinforcing structure 1 can be further enhanced.

  In the said embodiment, although the reinforcement member 4 is provided in the opening part 3 of the outer wall 2 of all four surfaces of a building, even if it is a case where all the four surfaces of a building do not have an opening part, there is no opening part. The reinforcing member 4 is preferably provided on the wall surface. Thus, by reinforcing all the outer walls 2 of the building in a well-balanced manner, it is possible to enhance the reinforcing effect not only around the opening but also the entire building.

DESCRIPTION OF SYMBOLS 1 Opening part reinforcement structure 2 Outer wall 2a Beam 3 Opening part 4 Reinforcement member 6 Foundation 10 Column structure 11 String material 12 Diagonal material 13 Horizontal material 14 Truss pillar 14a First truss pillar 14b Second truss pillar 15 Connection bracket 18 Gusset plate 19 Slit 20 Beam structure 21 Cross chord material 22 Diagonal material 23 Horizontal material 24 Truss beam 28 Gusset plate 29 Slit

Claims (7)

It is equipped with a gate-shaped reinforcing member to reinforce the opening of the outer wall of the building and secure an escape passage in the event of an earthquake ,
The reinforcing member comprises a pair of column structures standing along the opening, and a beam structure connecting the upper portions of the column structures,
The column structure has a truss column comprising a pair of vertical chord members extending in the vertical direction and a plurality of diagonal members spanned between the vertical chord members,
The beam structure has a truss beam comprising a pair of lateral chord members extending in the lateral direction and a plurality of diagonal members spanned between the transverse chord members,
An opening reinforcement structure, wherein an upper end portion of the pillar structure is fixed to the outer wall from the outside . 2. The opening reinforcing structure according to claim 1, wherein the pair of horizontal chord members of the beam structure are arranged with a gap in a horizontal direction . A gate-shaped reinforcing member for reinforcing the opening of the outer wall of the building;
The reinforcing member comprises a pair of column structures standing along the opening, and a beam structure connecting the upper portions of the column structures,
The column structure has a truss column including a pair of vertical chord members extending in the vertical direction and a plurality of diagonal members spanned between the vertical chord members, and is disposed in parallel to the outer wall. A first truss column and a second truss column arranged orthogonal to the outer wall, and exhibiting an L shape in plan view,
The beam structure has a truss beam comprising a pair of lateral chord members extending in the lateral direction and a plurality of diagonal members spanned between the transverse chord members,
An L-shaped connecting bracket in plan view is connected to the upper part of the first truss column and the second truss column, and the connecting member is connected to a beam provided at the upper part of the opening, so that the reinforcing member is The opening part reinforcement structure characterized by being fixed to the said outer wall. The opening reinforcement structure according to any one of claims 1 to 3, wherein the vertical chord member, the diagonal member, and the horizontal chord member are configured by round pipes. A slit is formed at the end of the diagonal member,
The vertical chord member and the horizontal chord member are provided with gusset plates,
The opening reinforcing structure according to claim 4, wherein the diagonal member is joined to the vertical chord member or the horizontal chord member by inserting and welding the gusset plate into the slit. The lower part of the pillar structure is connected by a foundation,
The opening reinforcing structure according to any one of claims 1 to 5, wherein the reinforcing member and the foundation are combined to form a frame shape. A method of constructing an opening reinforcement structure for reinforcing an opening of an outer wall of a building using a gate-shaped reinforcing member to secure an escape passage during an earthquake,
The reinforcing member comprises a pair of column structures standing along the opening, and a beam structure connecting the upper portions of the column structures,
The column structure has a truss column comprising a pair of vertical chord members extending in the vertical direction and a plurality of diagonal members spanned between the vertical chord members,
The beam structure has a truss beam comprising a pair of lateral chord members extending in the lateral direction and a plurality of diagonal members spanned between the transverse chord members,
The upper end of the pillar structure is fixed to the outer wall from the outside.
The construction method of the opening part reinforcement structure characterized by the above-mentioned.

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