JP2008208609A - Reinforcing structure of bearing wall in wooden building and steel frame member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing structure of a bearing wall in a wooden building capable of reinforcing a weak part in an existing building easily and constructing a bearing wall constructed by reinforcing a weak part easily in a new building. <P>SOLUTION: This reinforcing structure of the bearing wall is constituted by arranging a steel frame member on an inner side of an opening part to let the steel frame member act integrally with a support column of main structure lumber with respect to horizontal force. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present application relates to a reinforcing structure in which an opening in a wooden building such as a wooden house is a bearing wall.

  A wooden building such as a wooden house is provided with a so-called bearing wall such as a wall with braces or a wall with plywood, and the minimum value of the total amount of the bearing wall is stipulated by law.

  The architectural designer performs floor plan design and the like while providing a predetermined amount of bearing walls in order to comply with the laws and regulations while taking into account the requirements of the home purchaser and the contractor.

  Moreover, when designing a building, in order to strengthen the building, it is necessary not to make a weak part in the building, so the load-bearing walls need to be arranged in a balanced manner without being biased as much as possible. .

  If the load-bearing walls are installed in a well-balanced manner as described above, ventilation, lighting, design, and the like must be sacrificed. In general, there is a demand for a large opening on the south side of the building in order to improve daylighting, and the load-bearing walls tend to be offset.

  However, as shown above, when the building is placed with the bearing walls offset, if external force is applied to the building due to the occurrence of an earthquake, the external force acts on the weakest part of the building, As a result, twists and rotational forces are generated in the building, which may cause inconveniences such as deformation of the building.

  One solution is to reinforce the joint between the supporting beam and the column in the weak part of the building. However, the disadvantage of this method is that the material cost is increased, but a great effect cannot be expected. .

  Therefore, in order to eliminate an example of such a problem, the present application may be a load-bearing wall that easily reinforces weak parts for existing buildings, and that new buildings easily reinforce weak parts. An object of the present invention is to provide a reinforcing structure having a load-bearing wall as an opening in a possible wooden building and its construction method.

  In order to solve the above-described problem, the reinforcing structure in which the opening portion in the wooden building according to claim 1 is a bearing wall has an opening portion in which the upper, lower, left and right sides are framed by wood (11, 13, 15). In the building (5) having (7), the steel member (20) is disposed along the inside of the opening, and the steel member is integrated with the left and right timbers against a horizontal force received by the building. It is made to act on.

  Hereinafter, the best embodiment of the present application will be described with reference to the accompanying drawings. The building of this embodiment is an embodiment in the case where the reinforcement method of the load bearing wall in the wooden building of the present application is applied to the existing wooden building built by the frame construction method.

  FIG. 1 shows an example of a floor plan of a building. As shown in Fig. 1, at the design stage, if there is a request from the construction owner, etc., that the south side should be largely released in order to improve daylighting, the bearing wall meets the standard value of the bearing wall stipulated by law. In some cases, the wall body 2 functioning as a must be arranged so as to be offset to the north side. Such a building 5 in which the wall 2 is offset is a part on the south side when a horizontal force (for example, a force from the right side) is applied to the building 5 as indicated by an arrow in the figure due to the occurrence of an earthquake, for example. As a result, the building 5 is twisted or turned, and the building is easily deformed. In addition, the bearing wall that resists the horizontal force is indicated by diagonal lines.

  For example, in the case of a building as shown in FIG. 1, the present embodiment reinforces the south opening 7 to resist horizontal force and improves the balance of the force distribution between the south and north bearing walls. Thus, it is intended to suppress the deformation of the building 2 due to an external force such as an earthquake, and to reinforce a weak part of the building 2 to increase the degree of freedom of design.

  The reinforcement structure which uses the opening part in a concrete wooden building as a bearing wall, and its construction method are demonstrated using FIG.1 and FIG.2.

  The building 5 is a one-story wooden building constructed of wood, for example, and includes a plurality of support columns 13 and 13 erected on a horizontally provided base 11 and beams 15 connecting the support columns 13. A shaft group of the building 5 is configured, and a wall body 2 is formed by attaching a plate member and braces that function as bearing walls to the shaft group.

  In the case of the building 5 shown in FIG. 1, the reinforced portion is made to function as a load-bearing wall by reinforcing the south opening 7 (portion A in the drawing) without the load-bearing wall. Specifically, the reinforcing method using the opening in the building 5 in the present embodiment as the bearing wall places the steel member 20 inside the opening 7 (part A in the drawing) of the building 5, thereby building 5 The steel member 20 is caused to function as a load-bearing wall frame that acts integrally with the support column 13 with respect to the horizontal force applied thereto, and as a result, the distribution of the force of the load-bearing wall as a whole is made substantially uniform.

  Here, the reinforcement structure which uses the opening part in the wooden building in this embodiment as a load-bearing wall is demonstrated using FIG. FIG. 2 is an enlarged front view of a portion A in FIG.

  As shown in FIG. 2, the wooden frame that functions as a load-bearing wall of an existing wooden building includes a base 11 extending in the horizontal direction, left and right support columns 13 and 13 provided vertically from the base 11, and extending in the horizontal direction. Four sides are surrounded by the beam 15 connecting the columns 13 to form an opening 7. Further, the base 11 and the column 13 and the beam 15 and the column 13 are fixed by using a predetermined fixing member 17 such as a steel plate 17a and bolt nuts 17b, 17c, and 17d, respectively.

  In the reinforcing structure in which the opening in the wooden building in the present embodiment is a bearing wall, the steel member 20 is disposed inside the opening 7, and the steel member 20 is integrated with the column 13 with respect to the horizontal force applied to the building 5. To act on. Specifically, the steel member 20 includes a frame forming member 21 formed in a substantially L shape and a substantially linear extending member 24, and external force is applied when a horizontal force is applied. A frame forming member 21 is arranged at the upper corner of the opening 7 that acts greatly, and when the length is insufficient in the horizontal direction or the vertical direction, the extension member 24 is connected and arranged. Yes.

  The frame forming member 21 includes a bent portion 21 a that is substantially integrally formed. The bent portion 21 a is disposed in the vicinity of a connecting portion between the support column 13 and the beam 15, and the frame forming member 21 and the extension member 24 are provided. And a steel frame member 20 including the frame forming member 21 and the extending member 24 is disposed in a substantially gate shape along the support column 13 and the beam 15.

  Further, the steel member 20 is arranged in parallel with the beam 15 with a predetermined interval in order to bear only a horizontal force.

  The pair of frame forming members 21 arranged along the beam 15 is fixed at a substantially central portion of the beam 15 by a fixing tool 25 such as a bolt and nut, and extends with the frame forming member 21 arranged along the column 13. The member 24 is fixed below the support 13 by a fixing tool 25a such as a bolt and nut.

  In addition, the position where the frame forming members 21 are connected to each other is preferably, for example, a position where the force received by the frame assembly when the building receives a horizontal force, specifically, the gate as shown in the above embodiment. In the case of a mold, a position corresponding to the central portion of the beam 15 is preferable.

  In addition, the frame forming member 21 and the extension member 24 are designed with a predetermined dimensional length in consideration of ease of carrying, but basically the frame forming member 21 is formed at the corner inside the opening 7. This is achieved by supplementing the length of the missing portion with the extension member 24 when the bent portion 21a is arranged.

  The steel member 20 is fixed by penetrating the base 11 using a fixture 25a such as a bolt and nut, and is fixed by penetrating the column 13 using a fixture 34 such as a bolt and nut.

  Further, as shown in FIG. 3, a protrusion-shaped non-slip preventing member 30 generally called “jivel” is attached to the surface on the steel member 20 side arranged to face the support column 13. A steel member 20 is attached to the support column 13. In this way, the steel member 20 is more securely attached to the support column 13 without shifting.

  In addition, as shown in FIG. 4, for example, a steel frame member 20 having a shape generally referred to as H steel is used, and a wooden frame 31 is attached around the outside of the H steel, and a concave portion of the H steel is provided. It is preferable to perform the treatment so that the heat insulating material 33 is inserted into 20a and the wooden frame 31 is attached. In this way, since the steel member 20 of the reinforcing portion is hidden by the wooden frame 31, it can be used as a base for the wooden outer wall.

  The steel member 20 is not fixed to the column 13 using the fixing member 17 that fixes the column 13 and the beam 15 and the column 13 and the base 11, but independently using a predetermined fixture 34. It is fixed to the column 13.

  As described above, the reinforcing structure in which the opening in the wooden building of the present embodiment is a bearing wall and its construction method are the same for the base 11, the base 11, the column 13, the beam 15, etc. The steel member 20 is arranged along the inside of the support column 13 and the beam 15 except for the structure, and the steel member 20 is fixed to the base 11 and the support column 13.

  As a result, it becomes possible to cause the steel member 20 to act integrally with the support column 13 against the horizontal force received by the building 5 due to an earthquake or the like, and to function as a load-bearing wall. It can be reinforced as a wall. Moreover, even if it has the large opening 7 in the south side like the building 5 of the said embodiment, by arrange | positioning the steel frame member 20 inside the said opening 7, distribution of the force of a load-bearing wall as a whole floor plan is carried out. Since it can be evenly applied, even if a horizontal force is applied, the building is unlikely to be twisted or rotated. Therefore, it is possible to easily increase the safety of the building with a simple configuration.

  Next, another embodiment of the reinforcing structure in which the opening in the wooden building of the present application is a bearing wall will be described.

<Other Example 1>
The reinforcement structure which uses the opening part in the wooden building of a present Example as a load-bearing wall is demonstrated using FIG. FIG. 5 is a schematic structural diagram showing another embodiment 1 of the reinforcing structure in which the opening in the wooden building of the present application is a bearing wall.

  Whereas the example of the above-described best embodiment arranges the steel member 20 in a gate shape, this example differs from the above embodiment in that the steel member 20 is arranged in a B shape. With such a configuration, it is possible to increase the strength compared to the example of the best embodiment.

  The steel member of the present embodiment is configured in a B shape by combining four frame forming members 21. The bent portion 21 a of the frame forming member 21 is disposed in the vicinity of the corners of the columns 13 and the beams 15 or the columns 13 and the base 11. Each frame forming member 21 is fixed by a fixing tool 25 at a substantially central portion of the column 13, the base 11, or the beam 15. Further, the steel member 20 is disposed with a predetermined distance from the beam 15 in order to bear only the horizontal force. The frame forming member 21 installed at the lower end of the opening 7 is fixed by penetrating the base 11 using a fixture 25a such as a bolt and nut.

<Other Example 2>
The reinforcement structure which uses the opening part in the wooden building of a present Example as a load-bearing wall is demonstrated using FIG. FIG. 6 is a schematic structural diagram showing another embodiment 2 in the reinforcing structure in which the opening in the wooden building of the present application is a bearing wall.

  This example differs from the example of the above-mentioned best embodiment in that the steel frame members 20 are continuously arranged in a gate shape. With such a configuration, the wide opening 7 of the building 5 can be accommodated.

  The steel member 20 of the present embodiment is an application example when the opening 7 of the building 5 is wide in the horizontal direction. In this case, the steel member 20 is configured by combining the frame forming member 21, the extending member 24, and the extending member 28 formed in a T shape.

  Further, the bent portion 21 a of the frame forming member 21 is disposed in the vicinity of the corners of the column 13 and the beam 15, and the column 13 and the base 11. Each steel member 20 is fixed by predetermined fixing tools 25 and 25a.

  Further, the extending member 28 formed in a T-shape may be configured by connecting substantially linear extending members 24 to each other by predetermined fixing tools 25 and 25a. This is because the horizontal force generated by an earthquake or the like is much smaller than the bending moment applied to the corners of the columns 13 and 15 or the columns 13 and the base 11 (the bending moment becomes almost zero). is there.

<Other Example 3>
The reinforcement structure which makes the opening part in the wooden building of a present Example the bearing wall is demonstrated using FIG.7 and FIG.8. FIG. 7 is a schematic structural view showing another embodiment 3 in the reinforcing structure in which the opening in the wooden building of the present application is a bearing wall, and FIG. 8 is an enlarged view of D in FIG.

  In the above-described best embodiment, the steel member 20 is arranged in a gate shape inside the opening 7 so as to have a predetermined gap with the beam 15. After the steel member 20 is arranged in a gate shape inside the opening 7 so as to have a predetermined gap, the upper portion of the frame forming member 21 constituting the steel member 20 and the beam 15 at the upper corner inside the opening 7 are arranged. And is different from the above embodiment in that they are connected to each other. With such a configuration, the horizontal force generated in the building 5 due to an earthquake or the like can be distributed to the beam 15, so that the safety of the building 5 can be further improved.

  As shown in FIG. 7, the steel frame member 20 of the present embodiment is attached to the beam 15 via an L-shaped connecting member 40 having an upper end portion of a frame forming member 21 installed at the upper portion of the opening 7 made of an iron plate. Yes. The connecting member 40 is provided at each corner of the upper portion of the opening 7.

  As shown in FIG. 8, the connecting member 40 is fixed to the upper end portion of the frame forming member 21 by a fixture 43. The beam 15 is fixed by the connecting member 40, a through bolt 41, and a screw 42 provided in the vicinity thereof.

  In addition, this embodiment is one form and is not limited to this form. For example, the steel member 20 applied in the present embodiment uses a steel frame generally referred to as H steel, but other forms may be substituted. In the present embodiment, attention is paid to the opening in the first floor portion. However, if the building has two or three stories, the present application may be applied focusing on the opening in the second or third floor portion. .

  In this embodiment, the present application is applied to a wooden building generally constructed by a construction method called a shaft construction method. However, the present application is generally applied to a two-by-four construction method in which a wall is assembled. It is also possible to apply. In this case, the steel member 20 may be disposed inside an opening formed of a frame that is framed in four directions by a vertical frame and a horizontal frame in order to assemble the wall body.

  It is also possible to construct the present embodiment in combination with each other. For example, the connecting member 40 can be applied to the steel member 20 arranged in the B shape shown in the other embodiment 1 or the steel member 20 arranged continuously in the gate shape shown in the other embodiment 2. .

It is a figure which shows an example of a floor plan. It is a schematic structure figure of the reinforcement structure which uses the opening part in the wooden building of this application as a load-bearing wall. It is B enlarged view of FIG. FIG. 3 is an enlarged view of C in FIG. 2. It is a schematic structure figure which shows the other Example 1 in the reinforcement structure which uses the opening part in the wooden building of this application as a load-bearing wall. It is a schematic structure figure which shows the other Example 2 in the reinforcement structure which uses the opening part in the wooden building of this application as a load-bearing wall. It is a schematic structure figure which shows the other Example 3 in the reinforcement structure which uses the opening part in the wooden building of this application as a load-bearing wall. It is D enlarged drawing of FIG.

Explanation of symbols

5 Building 7 Opening 11 Base 13 Prop 15 Beam

Claims (5)

In a wooden building with an opening that is framed by wood on the top, bottom, left and right sides,
An opening in a wooden building, wherein a steel member is disposed along the inside of the opening, and the steel member is made to act integrally with the left and right timbers against a horizontal force received by the building. Reinforced structure with bearing walls. The steel member is
The steel member disposed along the left and right woods and the steel member disposed along the left and right woods disposed near the corners of the opening and the steel member disposed along the upper woods Integrally formed,
The said steel frame member is being fixed to the left and right timber and the lower timber, The reinforcement structure which uses the opening part in the wooden building of Claim 1 as a load-bearing wall.   The steel frame member is composed of a pair of substantially L-shaped frame forming members, and the bent portion of the frame forming member is disposed in the vicinity of the corner of the opening, and the frame forming members are arranged on the upper wood. The reinforcement structure which uses the opening part in the wooden building of Claim 2 as a load-bearing wall characterized by the above-mentioned.   The reinforcement structure which uses the extension steel frame member which extends the length of the said frame formation member of the perpendicular direction with respect to the ground as a load-bearing wall in the wooden building of Claim 3.   A steel member is disposed along the inside of the opening of the wooden building having an opening in which the four sides of the top, bottom, left and right are framed by wood, and the steel member is placed on the left and right against the horizontal force received by the building. A steel frame member used for a reinforcing structure having a load-bearing wall as an opening in a wooden building characterized by acting integrally with wood.

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