JP2023072168A - Reinforcement structure of wooden building and reinforcement method of wooden building - Google Patents

Abstract

To provide a reinforcement structure of a wooden building for reinforcing a joint part of a wooden building which can enhance earthquake resistance and workability.SOLUTION: A reinforcement structure of a wooden building has: a reinforcement for a foundation for reinforcement which is fixed to a foundation of the wooden building; a first anchor bolt for fixing a connection member to wood of the wooden building; a box member placed in the reinforcement; an elastic member which is stored in the box member and is deformable in a vertical direction; a second anchor bolt for fixing the connection member to the box member; and cement which is made to fill the peripheries of the reinforcement and the second anchor bolt and forms the foundation for reinforcement.SELECTED DRAWING: Figure 1

Description

The present invention relates to a reinforcing structure and reinforcing method for wooden buildings. In particular, it relates to a reinforcement structure and a reinforcement method for improving the seismic strength of a building constructed by a wooden frame construction method.

When a strong load is applied to a wooden building due to an earthquake or the like, an accident occurs in which the wooden building is damaged or collapses. In areas severely damaged by the 2016 Kumamoto earthquake, many wooden buildings collapsed, even if they conformed to the new 1981 earthquake resistance standards. In collapsed buildings, there were many cases in which joints such as pillars, girders, beams, foundations, and foundations were separated or destroyed. In order to improve earthquake resistance, a reinforcing structure is required to firmly fix the joints. As for the reinforcement structure against the force in the longitudinal direction, a structure such as a turnbuckle has existed in the past, but the reinforcement structure against the force in the beam direction has been rare.

The inventor of the present application has developed a reinforcing structure for a wooden building disclosed in Patent Literature 1 in view of the circumstances as described above. In the above reinforcing structure, a plurality of anchor bolts are fixed to the wooden building using an adhesive, and a reinforcing plate is connected to the plurality of anchor bolts to strongly reinforce the joints of the wooden building. . By using anchor bolts, the reinforcing plate can be firmly fixed to the foundation or wood. In addition, the inventor of the present application has developed the reinforcing structure of Patent Document 2 as a reinforcing structure for a wooden building using the wooden frame wall construction method. In the reinforcing structure, the wood near the floor of the second floor and the concrete foundation are fixed via reinforcing members. This improves the strength against the force applied in the direction separating the wood and the foundation.

Utility Model Registration No. 3225322 U.S. Pat. No. 1,088,3263

In Patent Literature 1, there is a limit to the size of the reinforcing plate, and it is limited to connecting members that are relatively close to each other. In Patent Document 2, since the reinforcing member disposed between the timber and the foundation is completely fixed to the timber and the foundation, all the force from the reinforcing member is transmitted to the timber and the foundation. Met. Since such a force must be received only by the timber and the foundation, there is a problem that the force applied to the timber and the foundation is large.

The present invention connects the foundation of a wooden building and timbers such as girders with connecting members, and forms a reinforcing base between the existing foundation and the connecting members, so that the force from the reinforcing members can be transferred to the reinforcing base. To provide a reinforced structure capable of further improving the seismic resistance by receiving an earthquake and by arranging an elastic member between the reinforcing members to reduce the force transmitted to the wood, the foundation, and the reinforcing foundation. .

The present invention comprises reinforcing bars for a reinforcing foundation fixed to the foundation of a wooden building, first anchor bolts for fixing connecting members to the lumber of the wooden building, and box members arranged on the reinforcing bars. an elastic member housed in the box member and deformable in the vertical direction; a second anchor bolt for fixing the connecting member to the box member; A reinforcing structure for a wooden building with cement forming a reinforcing foundation.
In the reinforcing structure constructed as described above, the connection members are connected between the foundation of the wooden building and the timber such as girders, so that even if a force acts in the direction of separating the foundation and the timber, the two are separated. can be suppressed. A reinforcing bar is fixed to the foundation, and a first anchor bolt fixed to the connecting member is fixed to the timber. In addition, cement is filled around the reinforcing bars fixed to the foundation and the second anchor bolts fixed to the connecting member to form a reinforcing foundation in addition to the existing foundation. As a result, the stability of the wooden building can be greatly improved against the force generated by an earthquake or the like. In addition, by arranging a vertically deformable elastic member between the reinforcing foundation and the connecting member, the elastic member can absorb the vertical force acting on the wooden structure and the reinforcing foundation, thereby improving earthquake resistance. can be further improved.

In the above configuration, the elastic member may be a plurality of springs arranged so as to be able to expand and contract in the vertical direction.
In the reinforcing structure configured as described above, the plurality of springs can absorb the vertical force acting on the wooden building and the reinforcing foundation. Since the elastic member can be formed by arranging a plurality of springs in the box member, it is possible to easily adjust the elastic force and improve workability.

In the above configuration, the connecting member includes a first connecting member fixed to the wood by the first anchor bolt and a second connecting member fixed to the box member by the second anchor bolt. and the first connecting member and the second connecting member are connected to each other.
In the reinforcing structure configured as described above, the connecting member is divided into two, the first connecting member and the second connecting member. As a result, the first connecting member can be fixed to a piece of wood such as a girder of a wooden building, and the second connecting member can be fixed to the box member of the reinforcing base. As a result, it is possible to improve workability, and it can be applied to wooden buildings having various external shapes.

The above configuration further includes a third connecting member connected to the second connecting member, wherein the third connecting member is a box member different from the box member by a third anchor bolt, and the It may be fixed to a box member arranged on a reinforcing bar, and the cement may also be filled around the third anchor bolt.
In the reinforcing structure configured as described above, the second connecting member and the third connecting member are fixed to the reinforcing base through the box members. Therefore, the connection between the reinforcing base and the connecting member becomes stronger, and the earthquake resistance can be further improved.

In the above configuration, the first connecting member and the second connecting member include a plate portion formed in a plate shape having a predetermined length and extending from the plate portion along the longitudinal direction of the plate portion. and the rib-free surface of the first connecting member and the rib-free surface of the second connecting member are connected in contact with each other. .
In the reinforcing structure configured as described above, the strength of the connecting member is improved by forming the rib on the connecting member, and the workability is improved by fixing the surfaces where the rib is not formed in contact with each other. not be damaged.

It is also possible to carry out the reinforcement structure of the wooden building as a reinforcement method.

According to the present invention, the reinforcing foundation is formed in addition to the existing foundation, and the reinforcing foundation, the connecting member, and the elastic member are arranged between the existing foundation and the timber such as the girder, thereby improving the earthquake resistance. provides a reinforced structure with a high

FIG. 4 is a side view showing a state in which the reinforcing structure of the present invention is attached to a wooden building; 1 is a front view showing a state in which a reinforcing structure of the present invention is attached to a wooden building; FIG. FIG. 2 is a plan view showing a partial cross section of a wooden building in which the reinforcing structure of the present invention is installed. It is the side view which expanded the vicinity of the girder of a wooden building, and showed one part in the cross section. It is the front view which expanded the girder vicinity of a wooden building. It is a figure which shows an example of a connection part. FIG. 4 is a cross-sectional view of the reinforcing structure of the present invention taken along line AA of FIG. 3; FIG. 4 is a cross-sectional view of the reinforcing structure of the present invention taken along line BB of FIG. 3; FIG. 4 is a plan view showing a state in which springs are arranged in a spring box;

Embodiments of the invention will now be described with reference to the drawings, given by way of example.
1 to 3 are diagrams showing a state in which the reinforcing structure of the present invention is attached to the wood of the foundation 2, girder 3, lower pillar 4, and upper pillar 5 of an existing wooden building 1. FIG. 1 to 3, the existing wooden building 1 is indicated by a broken line. In addition, exterior materials and the like are not shown. As shown in FIGS. 1 to 3, the reinforcing structure of the present invention includes a reinforcing base 10, a connecting member 20 (first connecting member), a connecting member 30 (second connecting member), a connecting member 40 (third connection member) and a connection member 60 . The connecting member 20, the connecting member 30, the connecting member 40, and the connecting member 60 are connected to each other. The lumber of the wooden building 1 and the connecting member 20 are fixed by anchor bolts 51 (first anchor bolts). The connecting members 30 and 40 and the reinforcing base 10 are fixed by anchor bolts 52 (second anchor bolts) and anchor bolts 53 (third anchor bolts), respectively. The connection member 60 and the foundation 2 of the wooden building 1 are fixed by anchor bolts 54 . 7 to 9, spring boxes 70 and springs 80 are arranged between the connecting members 30 and 40 and the reinforcing base 10. As shown in FIGS. In the following description, an example in which the reinforcing structure of the present invention is installed only on one side of the wooden building 1 will be described, but it is also possible to install the reinforcing structure of the present invention on multiple sides of the wooden building 1. be. It is particularly effective to arrange the two reinforcing structures on opposite sides of the wooden building 1 (positions 180 degrees apart in the outer peripheral direction).

4 and 5 are enlarged views showing the vicinity of the girder 3 of the wooden building 1. FIG. FIG. 4 shows a part of the structure in cross section. 4 and 5, a method of fixing the connecting member 20 to wood such as the girder 3 of the wooden building 1 will be described. In this embodiment, the connecting members 20 are attached to the girders 3, the lower pillars 4, and the upper pillars 5. do not have. As long as it is a member arranged at a certain distance or more from the foundation 2, it can be attached to any lumber of the wooden building 1, such as beams and braces. It is also possible to attach it to members other than wood.

The girder 3, the lower pillar 4, and the upper pillar 5 are provided with bolt holes for inserting the anchor bolts 51. As shown in FIG. In this embodiment, one bolt hole is provided on each of the left and right sides of the girder 3 with the lower pillar 4 and the upper pillar 5 interposed therebetween, and one bolt hole is provided on each of the lower pillar 4 and the upper pillar 5 with the girder 3 interposed therebetween. The bolt holes are formed horizontally using a drill or the like. The anchor bolt 51 has a predetermined diameter (20 mm in this embodiment) and a predetermined length (200 mm in this embodiment). Anchor bolts 51 are inserted into the bolt holes and arranged perpendicular to the wall surface of the wooden building 1 . An adhesive 55 is injected between the anchor bolts 51 and the bolt holes, and the anchor bolts 51 are firmly fixed to the girder 3, the lower pillar 4, and the upper pillar 5 with the adhesive 55. HIT-RE500V3 manufactured by Hilti Corporation, which is an epoxy resin mortar, is used for the adhesive 55 . An anchor bolt 51 having one end fixed to the girder 3, the lower pillar 4, and the upper pillar 5 is connected to the fixed portion 21 of the connecting member 20 at the other end.

As shown in FIGS. 4 and 5, the connecting member 20 includes a fixed portion 21 fixed to the anchor bolt 51, a plate portion 22 having a predetermined length and formed in a plate shape, and the fixed portion 21 and the plate portion 22. It has a connecting portion 23 for connecting the . FIG. 6 is a diagram showing an example of the fixing portion 21. As shown in FIG. The fixed portion 21 is a single steel plate (a single plate) having a predetermined thickness (9 mm in this embodiment). The fixed portion 21 has a vertical portion 21A arranged in the vertical direction, a horizontal portion 21B arranged in the horizontal direction, and an inclined portion 21C connecting the end of the vertical portion 21A and the end of the horizontal portion 21B. are doing. The vertical portion 21A, the horizontal portion 21B, and the inclined portion 21C are each formed in a linear shape having a predetermined width (70 mm in this embodiment), and the vertical portion 21A and the horizontal portion 21B intersect perpendicularly at the center. The fixing portion 21 as a whole has a substantially square outer shape in which four inclined portions 21C connect four ends of a vertical portion 21A and a horizontal portion 21B. As shown in FIG. 6, the corners of the square are slightly cut off in straight lines, and strictly speaking, the square has an octagonal shape. Four triangular (isosceles right triangle) cavities 21D are formed between the vertical portion 21A, the horizontal portion 21B, and the inclined portion 21C so as to pass through the fixing portion 21 in the thickness direction. Bolt holes 21E passing through the connecting member 20 in the thickness direction are provided near the upper and lower ends of the vertical portion 21A, near both left and right ends of the horizontal portion 21B, and near the center where the vertical portion 21A and the horizontal portion 21B intersect. It is An anchor bolt 51 is inserted through the bolt hole 21E. Two bolt holes 21F are formed between the three bolt holes 21E of the horizontal portion 21B. A bolt 24 that connects the fixed portion 21 and the connecting portion 23 is inserted through the bolt hole 21F. Two bolt holes 21G are formed between the bolt holes 21E of the two lower inclined portions 21C. A bolt 64 that connects the fixed portion 21 and the connecting portion 62 of the connecting member 60 is inserted through the bolt hole 21G.

The other end of the anchor bolt 51 fixed to the girder 3, the lower pillar 4, and the upper pillar 5 of the wooden building 1 is inserted into the bolt hole 21E of the fixing portion 21 at one end. At this time, the fixing portion 21 is fixed to the anchor bolt 51 by inserting nuts into the anchor bolts 51 from both sides of the fixing portion 21 and screwing the nuts into screw grooves formed in the anchor bolts 51 . A double nut may be used to improve fixing force. Thereby, the other end side of the anchor bolt 51 and the bolt hole 21E of the fixing portion 21 are connected and fixed. In addition, when the fixed part 21 is fixed to the anchor bolt 51 , a predetermined distance D is provided between the fixed part 21 and the wooden building 1 . The predetermined distance D is preferably about 60 mm to 80 mm.

The plate portion 22 is a single steel plate (a single plate) having a predetermined thickness (12 mm in this embodiment) and a predetermined width (200 mm in this embodiment). The length of the plate portion 22 is appropriately set according to the height of the wooden building 1 and the like. As shown in FIG. 1, the plate portion 22 is arranged to form a predetermined angle .theta. In order to form the predetermined angle θ between the wall surface and the plate portion 22, the upper end of the plate portion 22 is shaped to have an angle of (180−θ)°. A bolt hole through which a bolt 25 connecting the plate portion 22 and the connection portion 23 can be inserted is formed in the upper end of the plate portion 22 . The plate portion 22 has ribs 22</b>A extending from the plate portion 22 along the longitudinal direction of the plate portion 22 . The rib 22A is formed in a region excluding the vicinity of the upper end of the plate portion 22, and has a predetermined thickness (8 mm in this embodiment) and a predetermined height (100 mm in this embodiment). Four bolt holes are provided in the vicinity of the lower end of the plate portion 22 for connecting with a plate portion 32 of a connecting member 30 to be described later.

The connection portion 23 is a steel plate (one plate) having a predetermined thickness (9 mm in this embodiment) and having an L-shaped cross section. The connection portion 23 is provided with a bolt hole through which the bolt 24 is inserted and a bolt hole through which the bolt 25 is inserted. With one plate portion 22 sandwiched between two connection portions 23 from both sides, bolts 24 are inserted through the bolt holes of the connection portion 23 and the bolt holes of the plate portion 22 and fixed with nuts. Thereby, the connection portion 23 is fixed to the plate portion 22 . A bolt 25 is inserted through the bolt hole 21F of the fixed portion 21 fixed to the anchor bolt 51 and the bolt hole of the connecting portion 23 and fixed with a nut. Thereby, the connecting portion 23 is fixed to the fixing portion 21 . The connecting member 20 is integrated with the anchor bolt 51 as described above.

As shown in FIG. 2, the connecting member 60 includes a reinforcing bar 61 having a predetermined diameter (16 mm in this embodiment), a connecting portion 62 connecting the reinforcing bar 61 and the fixed portion 21 of the connecting member 20, and a connecting portion 62 connecting the reinforcing bar 61 and the wooden structure. and a connecting portion 63 that connects the base 2 of the object 1 . The length of the reinforcing bar 61 is appropriately set according to the height of the wooden building 1 and the like. Threads are formed on both ends of the reinforcing bar 61 . The connecting portion 62 and the connecting portion 63 are provided with insertion holes for inserting the reinforcing bars 61, and screw grooves are formed inside the insertion holes. By screwing the connecting portions 62 and 63 onto the reinforcing bar 61, the reinforcing bar 61 and the connecting portions 62 and 63 can be connected and fixed. The connection portion 62 is further provided with a bolt hole for inserting a bolt 64 . With the reinforcing bar 61 and the connecting portion 62 fixed, the bolt 64 is inserted into the bolt hole of the connecting portion 62 and the bolt hole 21G of the fixing portion 21 . Thereby, the connecting portion 62 and the fixing portion 21 are fixed. The connection portion 63 is further provided with a bolt hole for inserting the anchor bolt 54 . Bolt holes are formed in the foundation of the wooden building 1 using a drill or the like at positions corresponding to the anchor bolts 54 shown in FIG. The anchor bolts 54 are inserted into the bolt holes of the connecting portion 63 and the bolt holes 21G of the foundation 2 while the reinforcing bar 61 and the connecting portion 63 are fixed. An adhesive 55 is injected between the anchor bolt 54 and the bolt hole of the foundation 2 , and the anchor bolt 54 is firmly fixed to the foundation 2 by the adhesive 55 . As described above, the reinforcing bars 2 are connected between the fixed portion 21 and the foundation 2 .

7 and 8 are enlarged cross-sectional views showing the vicinity of the foundation 2 of the wooden building 1. FIG. Note that FIG. 7 shows the state before the cement 12 is filled. As shown in FIGS. 7 and 8, the connecting member 30 includes a cover portion 31 that is inserted into the anchor bolt 52 and closes the upper portion of the spring box 70, which will be described later, and a plate portion 32 that is formed in a plate shape having a predetermined length. , a connecting portion 33 for connecting the lid portion 31 and the plate portion 32 . The plate portion 32 has ribs 32</b>A extending from the plate portion 32 along the longitudinal direction of the plate portion 32 . The rib 32A has a predetermined thickness (8 mm in this embodiment) and a predetermined height (100 mm in this embodiment). The plate portion 22 of the connecting member 20 and the plate portion 32 of the connecting member 30 are connected and fixed using bolts and nuts. When the connecting member 20 and the connecting member 30 are connected, the surface of the connecting member 20 on which the ribs 22A are not formed and the surface of the connecting member 30 on which the ribs 32A are not formed are in contact with each other. That is, the direction in which the rib 22A protrudes from the plate portion 22 and the direction in which the rib 32A protrudes from the plate portion 32 are opposite directions (180°). As shown in FIG. 1, the plate portion 32 is arranged to form a predetermined angle θ with respect to the wall surface of the wooden building 1 . That is, the plate portion 32 and the plate portion 22 are arranged vertically symmetrically, and the plate portion 32, the plate portion 22, and the wall surface of the wooden building 1 form an isosceles triangle. Four bolt holes for connecting with the plate portion 22 of the connecting member 20 are provided near the upper end of the plate portion 32 . Further, four bolt holes for connecting with the plate portion 42 of the connecting member 40 are provided in the vertical intermediate portion of the plate portion 32 . The connecting member 20 and the connecting member 30 may be connected and then the connecting member 20 may be fixed to the anchor bolt 51, or the connecting member 20 and the connecting member 30 may be fixed to the anchor bolt 51 after the connecting member 20 and the connecting member 30 are fixed. may be concatenated.

The connecting member 40 includes a lid portion 41 inserted into the anchor bolt 53 to close the upper portion of the spring box 70 , a plate portion 42 formed in a plate shape having a predetermined length, and connecting the lid portion 41 and the plate portion 42 . It has a connecting portion 43 for The plate portion 42 has ribs 42</b>A extending from the plate portion 42 along the longitudinal direction of the plate portion 42 . The rib 42A has a predetermined thickness (8 mm in this embodiment) and a predetermined height (100 mm in this embodiment). As shown in FIG. 1, the plate portion 42 of the connecting member 40 is connected and fixed to the intermediate portion of the plate portion 32 of the connecting member 30 using bolts and nuts. When the connecting member 30 and the connecting member 40 are connected, the surface of the connecting member 30 on which the ribs 32A are not formed and the surface of the connecting member 40 on which the ribs 42A are not formed are in contact with each other. The plate portion 42 is arranged so as to form a predetermined angle θ with respect to the vertical direction. That is, the plate portion 42 is arranged symmetrically with the lower portion of the plate portion 32 . Four bolt holes for connecting with the plate portion 32 of the connecting member 30 are provided near the upper end of the plate portion 42 . By fixing the connecting member 40 to the intermediate portion of the plate portion 32 of the connecting member 30 , the connecting member is fixed to the reinforcing base 10 at two points, the connecting member 30 and the connecting member 40 .

The structure of the reinforcing base 10 and the structure for connecting the connecting member 30 and the reinforcing base 10 will be described with reference to FIGS. 7 to 9. FIG. Note that the structure for connecting the connecting member 40 and the reinforcing base 10 is the same as the structure for connecting the connecting member 30 and the reinforcing base 10, so the description thereof will be omitted.

The reinforcing base 10 has reinforcing bars 11 , cement 12 , spring boxes 70 and springs 80 . 7 is a front view of the state before the cement 12 is filled, and FIG. 8 is a side view of the state after the cement 12 is filled. As shown in FIG. 7, the foundation 2 of the wooden building 1 is provided with insertion holes for inserting the reinforcing bars 11 . In this embodiment, as shown in FIG. 8, four rebars 11 are arranged on the upper side and three rebars 11 are arranged on the lower side. An insertion hole is provided. The insertion hole is formed horizontally using a drill or the like. The rebar 11 has a predetermined diameter (10 mm and 19 mm in this example). By arranging the reinforcing bars 11 in the horizontal direction and the vertical direction, the general shape of the reinforcing base 10 is formed. A tip portion on one end side of the horizontally arranged reinforcing bar 11 protrudes horizontally and has a shape that can be inserted into the foundation 2 . The tip of the reinforcing bar 11 is inserted into an insertion hole provided in the foundation 2 and arranged perpendicular to the wall surface of the wooden building 1 . An adhesive 13 is injected between the reinforcing bar 11 and the insertion hole, and the reinforcing bar 11 is firmly fixed to the foundation 2 by the adhesive 13 . As the adhesive 13, HIT-RE500V3 manufactured by Hilti Corporation, which is an epoxy resin mortar, is used.

A spring box 70 is arranged and fixed on the upper part of the reinforcing bar 11 . Although the fixing method is not particularly limited, for example, it is possible to insert a bolt through the spring box 70 and fix it to the reinforcing bar 11 with a bolt and a nut. The spring box 70 is a box-shaped member (box member) made of steel and measuring 200 mm long×200 mm wide×45 mm high. The spring box 70 forms an accommodation space 71 capable of accommodating the spring 80 with its bottom surface and side surfaces, and has an open top surface. 7 and 8, illustration of the spring 80 is omitted. The bottom surface of the spring box 70 is formed with four bolt holes 72 through which the vertically arranged anchor bolts 52 can be inserted. The anchor bolt 52 has a predetermined diameter (20 mm in this embodiment) and a predetermined length (300 mm in this embodiment). As shown in FIG. 9, a spring 80 is arranged in the housing space 71 so as to be vertically expandable. The springs 80 are arranged in the accommodation space 71 in a self-supporting state by connecting nine strong springs each having a withstand load of 75 kg as one set. Also, 16 sets of springs 80 are arranged at positions avoiding the bolt holes 72 and fixed to the spring box 70 . Although the fixing method is not particularly limited, for example, it is possible to make a hole in the bottom surface of the spring box 70 and screw a bolt to the spring 80 from below. A drain hole 73 is formed in the vicinity of the bottom surface of the spring box 70 for draining water that has entered the housing space 71 .

The lid portion 31 of the connecting member 30 has an outer shape slightly smaller than the inner circumference of the upper opening of the spring box 70 . After the spring 80 is housed in the spring box 70 , the upper part of the housing space 71 is closed by disposing the cover part 31 above the spring box 70 . When the lid portion 31 is arranged above the spring 80 housed in the spring box 70, the upper surface of the spring box 70 and the upper surface of the lid portion 31 are arranged so as to be flush with each other. The lid portion 31 presses the upper surface of the spring 80 so that the spring box 70 can be elastically deformed in the vertical direction. The lid portion 31 is provided with bolt holes through which the anchor bolts 52 are inserted.

A connecting portion 33 is arranged above the lid portion 31 . The connection portion 33 is a steel plate (one plate) having a predetermined thickness (9 mm in this embodiment) and having an L-shaped cross section. Each connecting portion 33 is provided with a bolt hole through which the bolt 34 is inserted and a bolt hole through which the anchor bolt 52 is inserted. With one plate portion 32 sandwiched between two connection portions 33 from both sides, a bolt 34 is inserted through the bolt hole of the connection portion 33 and the plate portion 32 and fixed with a nut. Thereby, the plate portion 32 is fixed to the connection portion 33 . After the connecting portion 33 and the anchor bolts 52 are inserted through the bolt holes of the connecting portion 33 and the lid portion 31 from above, they are further inserted through the bolt holes 72 of the spring box 70 . The anchor bolt 52 and the connecting member 30 are thereby fixed to the spring box 70 .

The connecting member 20 is connected to the wood of the wooden building 1 by the anchor bolt 51, the connecting member 30 is connected to the connecting member 20, the connecting member 40 is connected to the connecting member 30, and the connecting members 30, 40 are connected to the spring box 70. By filling the cement 12 around the reinforcing bar 11 and the spring box 70 in the connected state, the reinforcing base 10 is formed. When the cement 12 hardens, the reinforcing bars 11 and the anchor bolts 52, 53 are fixed to the reinforcing base 10 as shown in FIG. As a result, the girder 3, the lower pillar 4, the upper pillar 5 and the foundation 2 of the wooden structure are strengthened through the connecting members 20, 30, 40, the reinforcing bars 11, the anchor bolts 51, 52, 53, and the reinforcing foundation 10. connected and fixed to At this time, since the accommodation space 71 is not filled with the cement 12 , the spring 80 can expand and contract in the vertical direction within the accommodation space 71 . As a result, even if a strong vertical force is applied between the girder 3, the lower pillar 4, the upper pillar 5 of the wooden building 1 and the foundation 2, the spring 80 expands and contracts to absorb the force.

The procedure for mounting the reinforcing structure of the present invention on the wooden building 1 will be described below. First, the position to fix the reinforcement structure to the wooden building 1 is determined. Specifically, the positions where the anchor bolts 51 are fixed to the wood such as the girder 3 of the wooden building 1 and the positions where the reinforcing bars 11 are fixed to the foundation 2 are determined. The lengths of the plate portions of the connecting members 20, 30, and 40 and the dimensions of the reinforcing bars of the connecting member 60 are determined according to the above-described positions, and members matching the determined dimensions are prepared.

A bolt hole for fixing the anchor bolt 51 is formed in the lumber of the wooden building 1 using a drill or the like. An anchor bolt 51 is inserted into the insertion hole and fixed with an adhesive 55 . The bolt hole 21E of the fixed portion 21 of the connecting member 20 is inserted into the fixed anchor bolt 51 and fixed with a nut or the like. The two connecting portions 23 are sandwiched between the two sides of the bolt hole near the upper end of the plate portion 22 of the connecting member 20, and the bolt 24 is inserted into the bolt hole and fixed with a nut. The bolt holes of the connecting portion 23 are aligned with the bolt holes 21F of the fixing portion 21, and the bolts 25 are inserted and fixed with nuts. As described above, the connecting member 20 is fixed to the wood of the wooden building 1 .

The lower end of the plate portion 22 of the connecting member 20 and the upper end of the plate portion 32 of the connecting member 30 are connected. Four bolt holes respectively provided in the plate portion 22 and the plate portion 32 are aligned and fixed with bolts and nuts. Also, the intermediate portion of the plate portion 32 of the connecting member 30 and the upper end of the plate portion 42 of the connecting member 40 are connected. The four bolt holes respectively provided in the plate portion 32 and the plate portion 42 are aligned and fixed with bolts and nuts. As described above, the connecting member 20 and the connecting member 30, and the connecting member 30 and the connecting member 40 are connected and fixed. A connecting portion 33 is fixed to the lower end of the plate portion 32 . Specifically, the two connection portions 33 are sandwiched on both sides of the bolt hole near the lower end of the plate portion 32, and the bolts 34 are inserted into the bolt holes and fixed with nuts. A connecting portion 43 is similarly fixed to the lower end of the plate portion 42 by a bolt 44 .

An insertion hole for fixing a reinforcing bar 11 is formed in the foundation 2 of the wooden building 1 using a drill or the like. A tip of one end side of the reinforcing bar 11 is inserted into the insertion hole and fixed with an adhesive 13 . The spring boxes 70 are arranged and fixed at the positions where the connecting members 30 and 40 are arranged on the reinforcing bars 11 , respectively. A spring 80 is previously arranged and fixed in the accommodation space 71 of the spring box 70 .

The bolt hole of the connecting portion 33 of the connecting member 30 and the bolt hole 72 of the spring box 70 are aligned, and the anchor bolt 52 is screwed from above. Thereby, the connecting member 30 is fixed to the spring box 70 by the anchor bolts 52 . Similarly, the connecting portion 43 of the connecting member 40 is also fixed to a spring box 70 different from the spring box 70 to which the connecting member 30 is fixed.

A connecting portion 62 is screwed into the upper end of the reinforcing bar 61 of the connecting member 60 . A connecting portion 62 is screwed into the upper end of the reinforcing bar 61 . In this state, the bolt holes of the connecting portion 62 are aligned with the bolt holes 21G of the fixing portion 21 of the connecting member 20, and fixed with bolts and nuts. A bolt hole for inserting an anchor bolt 54 for fixing the connecting portion 63 is formed in the foundation 1 of the wooden building 1 . An anchor bolt 54 is inserted into the insertion hole and fixed with an adhesive 66 . The fixed anchor bolt 54 is inserted into the bolt hole of the connecting portion 63 and fixed with a nut or the like. The connection member 60 is fixed to the wooden building 1 by the above.

As described above, the cement 12 is filled around the anchor bolts 52 and 53 and the reinforcing bars 11 while the anchor bolts, connecting members, reinforcing bars, etc. are arranged and fixed to the wooden building 1 . The cement 12 is filled up to the upper end of the spring box 70 , but not filled into the accommodation space 71 . As the cement 12 hardens, the reinforcing base 10 is formed. As described above, the reinforcing foundation 10 is firmly fixed to the foundation 2 of the wooden building 1 via the reinforcing bars 11 . Further, since the anchor bolts 52 and 53 are inserted through the bolt holes 72, the cement 12 hardens and is firmly fixed to the reinforcing foundation 10. As shown in FIG. Anchor bolts 52 and 53 are fixed to connecting members 30 and 40 , and connecting member 30 is fixed to connecting member 20 . The connecting member 20 is firmly fixed to the wood such as the girder 3 of the wooden building 1 via the anchor bolt 51 . Therefore, the timber such as the girder 3 of the wooden building 1 and the foundation 2 are connected via a connecting member or a reinforcing foundation. Although the order of the above-described procedures is arranged to simplify the explanation, the order in which the procedures are actually performed is not limited to the above-described order. Procedures performed in a different order are also included in the reinforcement method of the present invention.

As described above, in the reinforcing structure of the present invention, the connection members 20, 30, 40, and 60 are connected between the foundation 2 of the wooden building and the timber such as the girder 3, so that the foundation 2 and the timber Separation of the two can be suppressed even if a force acts in the direction of separating the two. A reinforcing bar 11 is fixed to the foundation 2, and a first anchor bolt fixed to a connecting member 20 is fixed to the wood. Cement 12 is filled around the reinforcing bars 11 fixed to the foundation 2, the second anchor bolts 52 fixed to the connecting members 30 and 40, and the third anchor bolts 52. A reinforcing base 10 is formed. As a result, the stability of the wooden building 1 against forces generated by an earthquake or the like can be significantly improved. Anchor bolts 52 and 53 resist lateral shaking during an earthquake, do not move upward, but move downward. By arranging a vertically deformable spring 80 between the reinforcing base 10 and the connecting members 30, 40, the elastic member 80 absorbs the vertical force acting on the wooden building 1 and the reinforcing base 10. - 特許庁It is possible to further improve earthquake resistance and prevent damage to the wooden structure.

Since the connecting members 20, 30, 40 and the reinforcing bars 11 are connected to each other in advance and fixed to the wooden building 1 before filling the cement 12, the reinforcing structure of the present invention can be easily applied to the existing wooden building 1. Construction is possible. A housing space 71 is formed in the spring box 70 , and the spring box 70 can be arranged between the reinforcing bars 11 and the connecting members 30 and 40 in a state where the spring 80 is housed in the housing space and fixed. In addition, construction can be performed so that the cement 12 does not enter the accommodation space 71 of the spring box 70 .

A connecting member is divided into a connecting member 20 fixed to the lumber of the wooden building and connecting members 30 and 40 fixed to the spring box 70 of the reinforcing base 10 . As a result, the connecting member 20 can be fixed to the wood, and the connecting members 30 and 40 can be fixed to the spring box 70 of the reinforcing base 10 . As a result, it is possible to improve workability, and the reinforcing structure of the present invention can be applied to wooden buildings 1 having various external shapes. In addition, by connecting the connecting member 40 to the intermediate portion of the connecting member 30, the connection between the reinforcing base 10 and the connecting members 20, 30, 40 can be made stronger and more stable, and earthquake resistance can be improved. It can be improved further. Furthermore, by forming the ribs 22A, 32A, 42A on the connecting members 20, 30, 40, the strength of the connecting members 20, 30, 40 can be improved. In addition, when connecting the connecting member 20 and the connecting member 30 or connecting the connecting member 30 and the connecting member 40, by fixing them in a state where the surfaces on which the ribs are not formed are in contact with each other, workability is not impaired.

The spring box 70 is an example of a box member, and what the spring box 70 accommodates is not limited to the spring 80 . Any member may be accommodated in the box member as long as it is an elastic member arranged so as to be deformable in the vertical direction. For example, by housing rubber or the like as an elastic member in the box member, it is possible to exhibit functions equivalent to those of the spring box 70 and the spring 80 .

In the above-described embodiment, the cement 12 is a general term for materials containing cement as a raw material, and forms concrete by hardening. Cement 12 does not necessarily indicate only cement as a substance, but generally includes water and gravel. Grout is also included in cement 12 . The cement 12 also includes cement 12 to which additives such as modifiers are added.

In the above embodiment, the existing foundation 2 and the reinforcing foundation 10 are connected via the reinforcing bars 11, but the members connecting the foundation 2 and the reinforcing foundation 10 are not limited to reinforcing bars. A metal rod-shaped member having a predetermined length can be used instead of the reinforcing bar 11 .

Although the connecting member 40 is fixed to the intermediate portion of the connecting member 30 in the above embodiment, the position where the connecting member 40 is fixed is not limited to the intermediate portion of the connecting member 30 . By fixing the connecting member 40 to an arbitrary position on the connecting member 30, it is possible to improve the strength of the entire reinforcing structure.

In the above embodiments, numerical values such as the diameter and length of the anchor bolt and the thickness of the connecting member are merely examples. The diameter and length can be appropriately selected according to the site to be used and the required reinforcement strength.

Although the epoxy resin mortar is used as the adhesive in the above examples, the adhesive is not limited to this. It is also possible to use other resin adhesives or adhesives other than resin adhesives. For example, AR Chemical Setter EX350 manufactured by Sanko Techno Co., Ltd. can be used as an adhesive.

In the above embodiments, the reinforcing structure of the present invention is described as a reinforcing structure for improving earthquake resistance by additionally installing it in an existing wooden building. is also possible.

In addition, it cannot be overemphasized that this invention is not what is restricted to the said Example. It goes without saying for those skilled in the art that
・Applying the mutually replaceable members and configurations disclosed in the above examples by appropriately changing the combination ・Although not disclosed in the above examples, it is a known technology and the above examples Appropriately replace the members, configurations, etc. that are mutually replaceable with the members, configurations, etc. disclosed in the above, and apply them by changing the combination ・Although not disclosed in the above examples, known techniques It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as a substitute for the members and configurations disclosed in the above embodiments based on the above, and change the combination and apply it. It is disclosed as

DESCRIPTION OF SYMBOLS 1... Wooden building, 2... Foundation, 3... Girder, 4... Lower pillar, 5... Upper pillar, 10... Foundation for reinforcement, 11... Reinforcement bar, 12... Cement, 13... Adhesive, 20... Connecting member, 21... Fixing part 22 Plate part 22A Rib 23 Connecting part 24 Bolt 25 Bolt 30 Connecting member 31 Lid part 32 Plate part 33 Connecting part 34 Bolt 40 Connection member 41 Lid portion 42 Plate portion 43 Connection portion 44 Bolt 51 First anchor bolt 52 Second anchor bolt 53 Third anchor bolt 54 Anchor bolt 55 Adhesive 60 Connecting member 61 Reinforcing bar 62 Connecting part 63 Connecting part 64 Bolt 66 Adhesive 70 Spring box 71 Accommodating space 72 Bolt hole , 80... Springs.

Claims (6)

Reinforcing bars for a reinforcing foundation fixed to the foundation of a wooden building;
a first anchor bolt for fixing the connecting member to the lumber of the wooden building;
a box member arranged on the reinforcing bar;
an elastic member housed in the box member and deformable in a vertical direction;
a second anchor bolt for fixing the connecting member to the box member;
A reinforcing structure for a wooden building, comprising: the reinforcing bars and cement filled around the second anchor bolts to form the reinforcing base. A reinforcing structure for a wooden building according to claim 1,
The elastic member is a plurality of springs arranged so as to be able to expand and contract in the vertical direction. A reinforcing structure for a wooden building according to claim 1,
The connecting member has a first connecting member fixed to the wood by the first anchor bolt and a second connecting member fixed to the box member by the second anchor bolt,
The first connecting member and the second connecting member are connected. A reinforcing structure for a wooden building according to claim 3,
further comprising a third connecting member connected to the second connecting member;
The third connecting member is fixed by a third anchor bolt to a box member different from the box member and arranged on the reinforcing bar,
The cement is also filled around the third anchor bolt. A reinforcing structure for a wooden building according to claim 3,
The first reinforcing connection and the second reinforcing connection each have a plate portion having a predetermined length and a rib extending from the plate portion along the longitudinal direction of the plate portion. death,
The surface of the first reinforcing connection on which the rib is not formed and the surface of the second connection member on which the rib is not formed are connected in contact with each other. A step of fixing reinforcing bars for a reinforcing foundation to the foundation of a wooden building;
a step of fixing the connecting member to the wood of the wooden building with a first anchor bolt;
disposing a box member containing a vertically deformable elastic member on the reinforcing bar;
fixing the connecting member to the box member with a second anchor bolt;
forming the reinforcing base by filling cement around the reinforcing bars;
A method of reinforcing a wooden building having

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