Repair method for structural members

Abstract

The present invention provides a method for repairing structural members that can suppress carbonization of the central portion of structural members in the event of a fire, when gaps occur between the joint surfaces of wooden materials. [Solution] In a method for repairing a structural member 1 in which a gap G occurs at the joint surface F between the wooden members 2, the method includes a step of filling the gap G at the joint surface F between the wooden members 2 with a heat intrusion suppressing material 11 that suppresses the intrusion of heat.

Description

Technical Field

[0006] , , ,

[0005] , ,

[0001] The present invention relates to a method for repairing a structural component when a gap occurs between mating surfaces of the wooden materials of a structural component composed of a plurality of wooden materials joined together.

Background Art

[0002] Patent Document 1 shows a structural component (a combined beam 10 and a combined column 20) composed of a plurality of wooden materials (wooden corner members 11, 21) joined together.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the structural component is composed of a plurality of wooden materials joined together in this way, warping may occur in the wooden materials due to drying after construction, etc., and a gap may occur between the mating surfaces of the wooden materials. When a fire occurs, heat enters the gap between the wooden materials, making the part on the member center side, such as the core part of the structural component, likely to carbonize.

[0005] In view of this situation, the main problem of the present invention is to provide a method for repairing a structural component that can suppress carbonization of the part on the member center side of the structural component when a fire occurs when there is a gap between the mating surfaces of the wooden materials.

Means for Solving the Problems

[0006] The first characteristic configuration of the present invention is a method for repairing a structural component when a gap occurs between mating surfaces of wooden materials of a structural component composed of a plurality of wooden materials joined together, The feature is that it includes a process of filling the gaps between the joint surfaces of the aforementioned wood materials with a heat penetration inhibitor to suppress the intrusion of heat.

[0007] According to this configuration, even if the wood material warps due to drying after construction, creating gaps between the joints of the wood material, the heat penetration inhibitor filling process can be performed to fill the gaps between the joints of the wood material with a heat penetration inhibitor to seal the gaps. This prevents heat from penetrating between the joints in the event of a fire, and suppresses carbonization of the central part of the structural members caused by heat penetration between the joints.

[0008] A second characteristic feature of the present invention is that, in the suppression material filling step, the heat penetration suppression material is filled into the portion of the frame component on the surface side of the gap.

[0009] According to this configuration, by filling the gaps with a heat intrusion inhibitor on the surface side of the structural members, it is possible to simplify the filling process of the heat intrusion inhibitor and reduce the amount of heat intrusion inhibitor used, while also obtaining a carbonization inhibitory effect on the central side of the structural members.

[0010] A third characteristic feature of the present invention is that, in the suppression material filling step, the heat penetration suppression material is filled in the gap at least at the boundary between the set area on the surface side of the frame component and the remaining area on the center side of the component, which is equal to the set thickness of the frame component.

[0011] According to this configuration, by filling the boundary between the surface-side setting area and the center-side area of ​​the structural member in the gap with a heat penetration suppressing material, it is possible to suppress the detachment of the heat penetration suppressing material even when the surface-side setting area of ​​the structural member is carbonized, while also obtaining a carbonization suppression effect on the center-side area of ​​the structural member.

[0012] A fourth characteristic feature of the present invention is that, in the suppression material filling step, the heat penetration suppression material, which is wider than the thickness of the set area on the surface side of the frame component, is filled into the gap between the joint surfaces of the wood components in such a manner that the width direction of the heat penetration suppression material is aligned with the thickness direction of the set area on the surface side of the component.

[0013] According to this configuration, in the suppression material filling process, a heat penetration suppression material wider than the thickness of the surface-side setting area of ​​the structural member is used. Therefore, even if there are some differences in the size of the gaps between the joint surfaces of the wood materials or the precision of the workers' work, the material can be penetrated to at least the boundary between the surface-side setting area of ​​the member and the remaining center-side area of ​​the member with a high probability, and the carbonization suppression effect on the center-side portion of the structural member can be obtained more reliably.

[0014] A fifth characteristic feature of the present invention is that it includes a sealing material filling step, in which a sealing material is filled on the outside of the heat penetration suppressing material that was filled in the suppressing material filling step.

[0015] With this configuration, the sealing material prevents the heat intrusion inhibitor from falling out through the gaps in the joint surfaces of the wood materials. [Brief explanation of the drawing]

[0016] [Figure 1] Perspective view of the structural members before the gaps were created. [Figure 2] Plan view of the structural members before repair. [Figure 3] Plan view of the structural members after the heat penetration suppression material has been filled in the suppression material filling process. [Figure 4] Plan view of the structural members after the sealing material has been filled in the sealing material filling process. [Figure 5] Plan view of structural members in the event of a fire while the structure is repaired. [Figure 6] Plan view of structural members in the event of a fire occurring before repairs are made. [Modes for carrying out the invention]

[0017] An embodiment of a method for repairing a framework component according to the present invention will be described based on the drawings. The method for repairing the framework component 1 is a repair method for the framework component 1 composed of a plurality of wood materials 2 as shown in FIG. 1, and is a repair method when a gap G occurs in the mating surface F between the wood materials 2 of the framework component 1 as shown in FIG. 2. This repair method for the framework component 1 is preferably performed in a season when the wood material 2 is likely to warp due to drying and the gap G between the mating surfaces F is likely to become maximum. Note that FIG. 1 shows the framework component 1 at the time of construction, and no gap G exists between the wood materials 2, and FIG. 2 shows the framework component 1 in which a gap G has occurred between the wood materials 2 due to drying or the like.

[0018] As shown in FIGS. 1 and 2, in the present embodiment, the framework component 1 is a column and is composed of two wood materials 2 joined together. Each of the two wood materials 2 is a rectangular parallelepiped having a cross-sectional shape in which the width in the front-rear direction X is wider than the width in the left-right direction Y, and in a state where the two wood materials 2 are aligned in the left-right direction Y (thickness direction), they are joined by joining materials 3 (see FIG. 2) at a plurality of locations arranged in the up-down direction Z at the central portion in the front-rear direction X.

[0019] The joining material 3 is composed of a bolt 7 inserted into an insertion hole 6 formed in the wood material 2 and a pair of nuts 8 installed in the insertion hole 6. Both ends of the insertion hole 6 are closed by a closing material 9.

[0020] The structural component 1 is designed with a certain charring allowance on the outer peripheral part of its cross-section. In this embodiment, as shown in FIG. 2, on the structural component 1, a member surface-side setting region A1 of a set thickness portion corresponding to, for example, one hour's charring allowance is set on the outer peripheral part of the cross-section, and a member center-side region A2, which is a part other than the member surface-side setting region A1 of the structural component 1 and is located closer to the center than the member surface-side setting region A1, is set. Note that the boundary B between the member surface-side setting region A1 and the member center-side region A2 is indicated by a two-dot chain line. Also, in this embodiment, the set thickness (the thickness of the member surface-side setting region A1) is set as the thickness corresponding to the charring allowance as described above, and specifically, it is set to 45 mm.

[0021] As shown in FIG. 1, even when the wooden materials 2 are joined in a state where they are in close contact with each other, as shown in FIG. 2, over time, warping may occur in the wooden materials 2, and a gap G may occur between the mating surfaces F of the wooden materials 2. When a fire occurs in a state where a gap G has occurred between the mating surfaces F of the wooden materials 2, as shown in FIG. 6, heat enters the gap G, making it easier for the fire to spread to the member center-side region A2 inside the member surface-side setting region A1, and there is a possibility that sufficient strength cannot be maintained. Note that FIG. 6 shows the structural component 1 when a fire occurs in a state where a gap G has occurred between the mating surfaces F of the wooden materials 2, and the carbonized or burned-out parts are indicated by gray hatching. Therefore, when a gap G occurs between the mating surfaces F of the wooden materials 2 as described above, the structural component 1 is repaired to prevent the fire from spreading to the member center-side region A2 when a fire occurs.

[0022] The repair method for the structural member 1, as shown in Figure 3, includes a heat intrusion suppression material filling step in which a heat intrusion suppression material 11 is filled into the gap G of the joint surface F between the wood materials 2 to suppress the intrusion of heat. Furthermore, the repair method for the structural member 1, as shown in Figure 4, includes a sealing material filling step in which a sealing material 12 is filled on the outside of the heat intrusion suppression material 11 that was filled in the heat intrusion suppression material filling step. In other words, the repair method for the structural member 1 includes a heat intrusion suppression material filling step and a sealing material filling step, with the sealing material filling step being performed after the heat intrusion suppression material filling step. In this embodiment, rock wool, which is a non-combustible elastic material, is used as the heat intrusion suppression material 11.

[0023] As shown in Figure 3, in the heat intrusion suppression material filling process, the heat intrusion suppression material 11 is filled into the portion of the frame structure member 1 on the surface side in the gap G. In this embodiment, the "portion of the frame structure member 1 on the surface side" is defined as the portion outside the midpoint between the center and the outer surface of the frame structure member 1 (on the outer surface side of the frame structure member 1), and the heat intrusion suppression material 11 is filled into the portion of the frame structure member 1 on the surface side in the gap G by pushing the heat intrusion suppression material 11 into the gap G of the joint surface F between the wood materials 2. The boundary B between the member surface side setting region A1 and the member center side region A2 is located in the portion of the frame structure member 1 on the surface side.

[0024] To further explain the filling position of the heat penetration inhibitor 11, in the inhibitor filling process, the heat penetration inhibitor 11 is filled in the gap G at the boundary B between the member surface setting area A1, which is at least the set thickness of the frame component 1, and the remaining member center side area A2. In this embodiment, when the heat penetration inhibitor 11 is pushed into the gap G of the joint surface F between the wood components 2, it is filled in a manner that extends from the member surface setting area A1 to the member center side area A2.

[0025] Furthermore, in order to fill the heat intrusion inhibitor 11 as described above, in the inhibitor filling process, the heat intrusion inhibitor 11, which is wider than the thickness L2 of the member surface setting area A1 of the frame component 1, is filled into the gap G of the joint surface F between the wood components 2 with the width direction of the heat intrusion inhibitor 11 aligned with the thickness direction of the member surface setting area A1. In other words, since the width L1 of the heat intrusion inhibitor 11 is formed to be wider than the thickness L2 of the member surface setting area A1 of the frame component 1, by pushing and filling the heat intrusion inhibitor 11 into the gap G with its width direction aligned with the thickness direction of the member surface setting area A1, the heat intrusion inhibitor 11 can be pushed from the boundary B towards the center of the frame component 1, and can be filled in a state that extends from the member surface setting area A1 to the member center side area A2. Furthermore, if the gap G is too narrow or for other reasons the heat intrusion inhibitor 11 cannot be pushed in to extend from the member surface-side setting area A1 to the member center-side area A2, the entire heat intrusion inhibitor 11 may be filled so that its central end is located outside the boundary B, and the entire heat intrusion inhibitor 11 is located in the member surface-side setting area A1.

[0026] Furthermore, as shown in Figures 3 and 4, in the heat intrusion suppression material filling process, the heat intrusion suppression material 11 is filled in such a state that its outer end is located a set distance towards the center from the outer surface of the frame component member 1, and a space for sealing material 12 is formed outside the heat intrusion suppression material 11 in the gap G, allowing for the filling of sealing material 12. Then, as shown in Figure 4, in the sealing material filling process, the sealing material 12 is filled into the space for sealing material that is formed on the outside of the heat penetration suppression material 11 in the gap G of the joint surface F between the wood materials 2.

[0027] As shown in Figure 2, even if the wood material 2 warps due to drying or other reasons, creating a gap G between the joint surfaces F of the wood material 2, as shown in Figure 3, by performing a suppression material filling process and filling the gap G between the joint surfaces F of the wood material 2 with the heat penetration suppression material 11 to seal the gap G, it is possible to prevent heat from penetrating between the joint surfaces F in the event of a fire. As shown in Figure 5, it is possible to suppress the carbonization of the central part of the structural member 1 due to heat penetrating between the joint surfaces F.

[0028] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0029] (1) In the above embodiment, a configuration in which the heat penetration suppressing material 11 is filled from the member surface side setting region A1 to the member center side region A2 was described as an example. However, the heat penetration suppressing material 11 may be filled into the member surface side setting region A1 such that the end of the heat penetration suppressing material 11 on the center side is located at boundary B, or the heat penetration suppressing material 11 may be filled into the member center side region A2 such that the end of the heat penetration suppressing material 11 on the surface side is located at boundary B.

[0030] (2) In the above embodiment, when filling the gap G with the heat intrusion inhibitor 11, an example was described in which the heat intrusion inhibitor 11, which is wider than the thickness L2 of the surface-side setting area A1 of the frame component 1, is filled into the gap G of the joint surface F between the wood components 2 in a position in which the width direction of the heat intrusion inhibitor 11 is aligned with the thickness direction of the surface-side setting area A1 of the frame component 1. However, the method of filling the gap G with the heat intrusion inhibitor 11 may be changed as appropriate, for example, by sequentially pushing multiple heat intrusion inhibitor 11 into the gap G. In addition, the distance between the joint surfaces F of the pair of wood components 2 and the depth of the gap G between the joint surfaces F may be measured, and if the distance is wide or deep, a relatively wide heat intrusion inhibitor 11 may be pushed into the gap G, and if the distance is narrow or shallow, a relatively narrow heat intrusion inhibitor 11 may be pushed into the gap G, so as to use the heat intrusion inhibitor 11 according to the distance between the joint surfaces F and the depth of the gap G between the joint surfaces F.

[0031] (3) In the above embodiment, an example was described in which rock wool is used as the heat penetration suppression material 11. However, the heat penetration suppression material 11 may be made of other non-combustible elastic materials such as alkali earth silicate (AES) wool, or it may be made of a thermal expansion material.

[0032] (4) In the above embodiment, a configuration in which multiple wooden members 2 constituting the structural member 1 are two wooden members 2 with a rectangular cross-sectional shape was described as an example. However, the number of wooden members 2 constituting the structural member 1 and their cross-sectional shapes may be changed as appropriate, such as by using three or more wooden members 2 constituting the structural member 1, or by making the cross-sectional shape of some or all of the wooden members 2 constituting the structural member 1 square.

[0033] (5) In the above embodiment, a configuration in which the structural member 1 is a column was described as an example, but the structural member 1 may be a beam or the like, and can be any type of member that constitutes the frame.

[0034] (6) In the above embodiment, a configuration was described as in which the wooden material 2 is fastened with binding members 3 at multiple locations arranged in a single row in the vertical direction Z at the center of the wooden material 2 in the front-to-back direction X. However, the positions where the binding members 3 are used and the number of binding members 3 can be changed as appropriate, such as fastening the wooden material 2 with binding members 3 while the wooden material 2 is arranged in two rows in the vertical direction.

[0035] (7) In the above embodiment, an example was described in which the fastening material 3 is made up of bolts 7 and nuts 8, but the fastening material 3 may also be made up of screws or other materials other than bolts 7 and nuts 8.

[0036] (8) In the above embodiment, an example was described in which the set thickness (thickness of the set area A1 on the surface side of the member) is set to 45 mm, which corresponds to the burn allowance for a fire resistance time of 1 hour. However, the set thickness may be set to a thickness corresponding to the burn allowance for a fire resistance time other than 1 hour, and can be set to an appropriate thickness depending on the required fire resistance time, etc. [Explanation of symbols]

[0037] 1 Structural component 2 Wood material 11 Heat intrusion suppression material 12 Sealing material A1 Set area on the surface side of the member A2 Area on the center side of the member B Boundary F Fitting surface G Gap

Claims

1. A method for repairing a structural member when there is a gap between the joints of multiple wooden members in a structural member that is constructed by joining together several wooden members, A method for repairing structural members of a frame, comprising a step of filling the gap between the joint surfaces of the aforementioned wooden materials with a heat intrusion suppressing material to suppress the intrusion of heat.

2. The method for repairing a structural member according to claim 1, wherein in the suppression material filling step, the heat penetration suppression material is filled into the portion of the structural member on the surface side of the structural member in the gap.

3. The method for repairing a structural member according to claim 1 or 2, wherein in the suppression material filling step, the heat intrusion suppression material is filled in the gap at least at the boundary between the set area on the surface side of the structural member and the remaining area on the center side of the structural member, which is the set thickness of the structural member.

4. The method for repairing a structural member according to claim 1 or 2, wherein in the step of filling the suppressing material, the heat penetration suppressing material, which is wider than the thickness of the set area on the surface side of the structural member equal to the set thickness of the structural member, is filled into the gap between the joint surfaces of the wooden members in such a position that the width direction of the heat penetration suppressing material is aligned with the thickness direction of the set area on the surface side of the member.

5. A method for repairing a structural member of a frame according to claim 1 or 2, further comprising a sealing material filling step of filling the outside of the heat intrusion suppressing material that has been filled in the suppressing material filling step.

Images