JP3225322U - Reinforcement structure for seismic strength of wooden buildings - Google Patents

Abstract

An object of the present invention is to provide a reinforcing structure for strengthening earthquake resistance by greatly reinforcing the strength of intersections where main members of a skeleton, such as columns, girders, wooden foundations, beams, foundations, etc. of wooden houses intersect. A plurality of anchor bolts (B1 to B4) having high pull-out strength are drawn in the same horizontal direction, and vertically, horizontally, and vertically, at a crossing point of a cross-section of a pillar (C1, a wooden base (M), and a foundation (K)) of a wooden house. A plurality of anchor bolts are planted at predetermined intervals, the anchor bolts are pierced through the thick high-strength reinforcing plate S1, and the anchor bolts and the reinforcing plate are attached with nuts BN. Increase strength. [Selection diagram] Fig. 1

Description

  The present invention aims to reduce the strength of the structure at the intersection where the main members of the upper pillar, lower pillar, girder, beam, wooden base, and foundation structure intersect in a wooden house assembled with wood as the main strength material. The present invention relates to a structure for reinforcing the seismic strength of a wooden building that enhances the seismic strength of a house. In particular, a stiffener and an anchor that are connected to the intersection with a tenon and a tenon hole, and that prevent the destruction of the tenon connection at the intersection and the resulting decrease in seismic resistance that occur when the bracing is connected to the column side at this point It relates to reinforcement technology using bolts.

  Japanese traditional wooden building houses are constructed of wood, the main components of which are pillars, girders, beams, and wooden foundations. The problem with the seismic resistance and strength of this wooden house is that there is weakness at the intersections where the main pillars of the upper pillars, lower pillars, girders, beams, wooden foundations and foundation structures intersect, As a result, houses have collapsed due to strong shaking and strong lateral loads due to the earthquake.

  As disclosed in Patent Document 1, there is a structure in which L-angle brackets are reinforced with wood screws between members at the intersections of the skeleton, but when a large earthquake or a strong lateral load / bending moment is applied to this portion. However, the reinforcement by the L-angle bracket and the wood screw cannot sufficiently cope with a lateral load or a large bending moment, and the wood screw is pulled out, the L-angle bracket comes off, and it is difficult to prevent collapse.

  Furthermore, in wooden houses, bracing was attached to the walls to increase the structural strength. This considerably increased the strength of the structure. However, this bracing alone did not provide enough strength reinforcement at the intersection of Japanese wooden structures. Furthermore, in the case of fitting with a tenon and a tenon hole, which is a characteristic of Japanese wooden structures, there have been cases where the tenon and the tenon hole are broken by a lateral load from a bracing, and the strength of this portion is greatly reduced.

JP-A-2019-178527

  The problem to be solved by the present invention is to solve the problem of insufficient strength at intersections in conventional wooden houses, to greatly improve the strength of this area with a simple structure, and to use the tenon and tenon generated at this part. Provided is a reinforcing structure capable of preventing a decrease in strength due to a hole breakage and improving seismic strength.

The configuration of the present invention that solves such a problem,
1) At the intersection of the skeleton where three or more members of the upper pillar, lower pillar, girder, beam, wooden base, or foundation, which will be the skeleton of the wooden house, will be arranged vertically, horizontally,
For each of the three members to be arranged vertically and horizontally, a plurality of anchor bolts are implanted so as to protrude in the same horizontal direction so as to maintain an interval longer than a predetermined vertical or horizontal interval length,
In addition, the anchor bolt is firmly fixed to the planted member with a resin adhesive, and the anchor bolt is strongly pulled to pull it out of the planted member. A high withdrawal safety load value serving as an indicator for pullout set in the above is secured, and a high-strength reinforcing plate is arranged so as to face the three members on which the anchor bolts are implanted, and the anchor bolt is mounted on the reinforcing plate. Through, the anchor bolts and the reinforcing plate are firmly connected with nuts, and the intersection of the frame of the wooden house is reinforced with the reinforcing plate and anchor bolts to enhance the seismic resistance of the house. Reinforcement structure of seismic strength 2) The distance between the upper and lower anchor bolts is 300 mm or more, which is the predetermined vertical distance, and the distance between the left and right anchor bolts is the predetermined left and right. The spacing of 180 mm or more, the reinforcement structure for the seismic strength of the wooden building described in 1) above 3) The pull-out safety load value of each anchor bolt is 30 KN or more, and the number of anchor bolts is 4 or more. The structure for reinforcing the seismic strength of the wooden building according to the above 1) or 2) 4) The wooden members at the intersections of the wooden house are connected by tenons and tenon holes, and the ends of the braces are further joined at the intersections. Is connected to the end by metal
While increasing the seismic strength by connecting the reinforcing plate and the anchor bolt to the intersection at the nut, the joint strength of the mortise and the mortise at the intersection with respect to the lateral load of the brace was increased to reduce the destruction of the mortise structure. 1) to 3), wherein the structure is a structure for reinforcing seismic strength of a wooden building.
Incidentally, the numerical value of the "pull-out safe load" of the anchor bolt in the present specification and claims is defined as the value of the pulling force of pulling out the anchor bolt by strongly pulling it out from the member where the anchor bolt is planted. It is defined as a pull-out safety load value that is an index for pull-out by setting it to a low value with a margin. Therefore, even if a tensile force of KN less than that value is applied to the anchor bolt, the anchor bolt is removed from the member in which it is planted. Refers to a physical property value of resistance to tensile force that cannot be pulled out.

  In the present invention, at the intersection of the frame of a wooden house where three or more members of a wooden house are arranged vertically and horizontally, anchor bolts having a high pull-out strength are placed at a predetermined long distance apart vertically and horizontally on the three members in the same direction. A plurality of studs are planted so as to protrude, and a reinforcing plate is connected to the same anchor bolt with a nut to impart structural strength to withstand lateral loads acting on this portion and bending moments in the vertical and horizontal directions. It can increase earthquake resistance and suppress the collapse of houses.

  In addition, even if the end of the brace for enhancing the wall strength of the house is attached to a pillar or a wooden base in this part, the present invention suppresses the destruction of the connection between the tenon and the tenon hole in this part, and the brace is used. It also prevents the house from collapsing due to the tenon breaking against the lateral load.

In particular, the spacing between the upper and lower planting of the anchor bolts is 300 mm or more and the spacing between the left and right planting is 180 mm or more, and the pull-out safety load value of the anchor bolt is 30 KN or more or 40 KN or more, and the number of anchor bolts is four. With the above or six or more, the above structural strength of the present invention is ensured, and the collapse of the house can be more reliably suppressed.
Further, if the pull-out safety load value is set to 30 KN or more and the number of anchor bolts is set to 6 or more, higher reinforcement is possible.

FIG. 1 is an explanatory view showing a mounting structure of three members, an anchor bolt, and a reinforcing plate at an intersection of the first embodiment. FIG. 2 is a front view showing a state in which the reinforcing plate of the first embodiment is attached to three members. FIG. 3 is an explanatory view showing a mounting structure of three members, an anchor bolt, and a reinforcing plate at an intersection of the second embodiment. FIG. 4 is a front view showing a state in which the reinforcing plate of the second embodiment is attached to three members. FIG. 5 is an explanatory view showing the mounting state of another reinforcing plate and three members according to the present invention. FIG. 6 is an explanatory view showing the mounting state of another reinforcing plate and three members according to the present invention. FIG. 7 is an explanatory view showing an attachment state of another reinforcing plate and three members according to the present invention. FIG. 8 is an explanatory view showing the mounting state of another reinforcing plate and three members according to the present invention. FIG. 9 is a front view showing an example of the reinforcing plate of the present invention. FIG. 10 is an explanatory view showing a connecting portion between a tenon and a tenon hole between a pillar and a wooden base in three members of a column, a wooden base and a foundation of a conventional wooden house. FIG. 11 is an explanatory view showing a connection state between a strut and a pillar at a protruding corner of a conventional wooden house.

  In the present invention, it is ensured that the vertical distance between the anchor bolts on the upper and lower members is 300 mm or more, and the horizontal distance between the anchor bolts on the left and right members is longer than 180 mm, so that the structural strength is improved. Further, it is preferable that the withdrawal safety load value of the anchor bolt is 30 KN or more, preferably 40 KN or more, and the number of anchor bolts is 4 or more, preferably 6 or more, to increase the reinforcing strength.

  The present invention will be described below based on embodiments.

(Example 1)
Example 1 shown in FIGS. 1 and 2 is a foundation K which is a lower member having a width of 150 mm in a wooden house, a wooden base M which is a horizontal member having a size of 120 mm × 120 mm, and an upper member having a width of 105 mm × 105 mm. a reinforcing structure example in which the intersection portion X ₁ and Kaibashira C _1. The reinforcing plate S ₁ is a 9 mm-thick galvanized steel plate, and two stainless steel anchor bolts B ₁ and B ₂ each having a diameter of 22 mm and a length of 206 mm are vertically separated from each other by 120 mm above the first floor column C _1. implanted, and a 1 Kaibashira C ₁ of the anchor bolt B ₃ stainless bolt length 206mm diameter 22mm wood foundation M is a transverse member of the right position of the downwardly one implanted. Its planted position right offset length from the longitudinal center line of 1 Kaibashira C ₁ is 228 mm. Further, by implanting the lower anchor bolts B ₄ in position above the lower 680mm anchor bolt B ₂ at the position of the basal K is a lower member of the right position of the same offset length below the same anchor bolt B ₃ I have. For the anchor bolts B ₁ , B ₂ , B ₃ , B ₄ , resin-based adhesive injection type anchor “HIT-RE 500 V3” sold by HILTI is injected into the adhesive injection point PS of the screwed portion with each member. Where PS is the adhesive injection point.
The vertical distance between the upper and lower anchor bolts B ₁ and B ₄ , B ₂ and B ₄ is 800 mm and 680 mm, and the horizontal distance between the anchor bolts B ₁ and B ₂ and the anchor bolts B ₃ and B ₄ is 228 mm. In the length, BN is a nut to be screwed to the anchor bolts B _{1 to} B ₄ to mount the reinforcing plate S ₁ , DB is the rim, SD is the siding, SE is the sealing, and MB is the wooden base M and the base K is connected. An anchor bolt W extending in the vertical direction is a washer.
Thus, the anchor bolt B ₁ .about.B ₄ is implanted divided into three members 1 Kaibashira C ₁ wood base M and foundation K intersection site, four anchor bolts B ₁ .about.B by the adhesive _As a pull-out safe load value of No. ₄ , 40 KN was secured. The vertical spacing is 680 mm, 800 mm, and the horizontal spacing is 280 mm. The three members are connected by a total of four anchor bolts B _{1 to} B ₄ by a 9 mm thick reinforcing plate S ₁ plated with high strength zinc. interval and lateral spacing also have a length sufficiently against lateral load and moment of the intersection portion X _1, coupled with high strength, increasing the coupling strength of the site could increase the resistance to vibration.

(Example 2)
Configuration of intersection portions of the second embodiment shown in FIGS. 3 and 4, a lower member 1 Kaibashira _{C 1} and a lateral member is 2 Kaiketa _{L 2} and 105 mm × a top member of 105 mm 2 and Kaibashira _{C 2} three members intended for connecting the intersection portion _{X 2} of 2 Kaibashira _C 2 pieces of anchor bolts _B 5 above _{2, B 6,} and also two in 1 Kaibashira _{C 1} of the lower anchor bolts _{B 7} , it is provided with a _{B 8.} Further, the implanted anchor bolts _{B 9, B 10} of the one to the right and left 2 Kaiketa _{L 2.} Then, the reinforcing plate S ₂ Galvanized steel sheet cross-shaped 9mm thick is used. Planted of each member is the same manner as Example 1 of the anchor bolt _B 5 _{.about.B 10,} adhesive injection point the HILTI sold by the company resin adhesive systems injection method anchor "HIT-RE 500 V3" is threaded surface injected into PS, it has secured 30KN as pullout safety load value of the anchor bolt _B 5 _{.about.B 10} six.
In the second embodiment, the distance between the upper anchor bolts B ₅ and B _{6 of the first} and second columns C ₁ and C ₂ and the lower anchor bolts B ₇ and B ₈ is 800 mm at the maximum and 560 mm at the minimum. The distance between the left and right anchor bolts B ₉ and B ₁₀ is about 385 mm, which is a sufficiently long distance. Therefore, with respect to the lateral load on the left and right, the bending moment on the up and down, and the left and right, each of the anchor bolts B _{5 to} B ₁₀ holds 30 KN as a high pull-out safe load value, and is sufficient for a high bending moment external load. It can retain the strength to withstand.

Other intersection portion _X 3 to X ₈ of the present invention and the arrangement of the outer shape and the anchor bolt of the reinforcing plate _S 3 to S ₉ are shown in Figures 5-8. Both basal K as precursor of the three members, wood base M and 1 Kaibashira _C 1, 2 Kaibashira _{C 2} and 2 Kaiketa _{L 2} or cabin spar _{L 3,} the intersection portions of the three members pillar _{C 3 X 5} , X ₆ , X ₇ , X _8, in which the same resin adhesive is injected into the adhesive injection point PS of the threaded portion of the plant, and the thickness of the galvanized stainless steel is using reinforcing plate _{S 5, S 6, S 7} , S 8. In each case, the pull-out safety load is 30 KN or more, and the number of anchor bolts is 6 or more.
In this other example, improvement in earthquake resistance can be expected by the same strength reinforcement as in the first and second embodiments.

  FIG. 10 shows a state in which a tenon H and a tenon hole HH are connected between a pillar and a wooden base in a conventional wooden house. The connection between the mortise H and the mortise HH is broken by the lateral load from the reinforcement SUJ when the bracing SUJ is attached to the column C with the connecting tool SUJK. By connecting the anchor bolt and the reinforcing plate and injecting the adhesive to the three members, a high pull-out safe load against a strong lateral load can be achieved, and breakage of the tenon portion can be suppressed.

  The mounting interval between the upper and lower anchor bolts of the present invention is 300 mm or more, and the mounting interval between the left and right anchor bolts is 180 mm or more, and the pull-out safety load value of the anchor bolt is 30 KN or more or 40 KN or more. If there is, it is judged that the structural strength capable of withstanding the bending moment due to the earthquake acting on this portion is possible.

  The present invention can also be used for buildings using wood other than houses.

K Basic M wood foundation C pillar C ₁ 1 Kaibashira C ₂ 2 Kaibashira C ₃ poster material DB furring strip _{B 1 ~B 10, B 31 ~B} 66 anchor bolts BN nuts L ₂ 2 Kaiketa L ₃ cabin spar PS adhesive injection point MB anchor bolt S ₁ to S ₉ reinforcing plate S ₁₀ to S ₉₀ bolt holes SD siding SE sealing X ₁ to X ₈ intersection site H mortise HH mortise SUJ bracing SUJK connector W washer

Claims (4)

At the intersection of the skeleton where three or more members of the upper pillar, lower pillar, girder, beam, wooden base or foundation that will be the skeleton of the wooden house will be arranged vertically and horizontally
For each of the three members to be arranged vertically and horizontally, a plurality of anchor bolts are implanted so as to protrude in the same horizontal direction so as to maintain an interval longer than a predetermined vertical or horizontal interval length,
Moreover, the anchor bolt is firmly fixed to the planted member with a resin adhesive, and the anchor bolt is strongly pulled to pull it out from the planted member. A high withdrawal safety load value serving as an indicator for pullout set in the above is secured, and a high-strength reinforcing plate is arranged so as to face the three members on which the anchor bolts are implanted, and the anchor bolt is mounted on the reinforcing plate. Through, the anchor bolts and the reinforcing plate are firmly connected with nuts, and the intersection of the frame of the wooden house is reinforced with the reinforcing plate and anchor bolts to enhance the seismic resistance of the house. Reinforced structure with earthquake resistance.   The reinforcing structure of the wooden building according to claim 1, wherein the distance between the upper and lower anchor bolts is equal to or greater than a predetermined vertical distance of 300 mm, and the distance between the left and right anchor bolts is equal to or greater than a predetermined horizontal distance of 180 mm.   The reinforcing structure for a seismic strength of a wooden building according to claim 1 or 2, wherein the pull-out safety load value of each anchor bolt is 30KN or more and the number of anchor bolts is 4 or more. The wooden members at the intersection of the wooden house are connected by a tenon and a mortise, and the end of the brace is further connected to a pillar at the intersection by end fittings,
While increasing the seismic strength by connecting the reinforcing plate and the anchor bolt to the intersection at the nut, the joint strength of the mortise and the mortise at the intersection with respect to the lateral load of the brace was increased to reduce the destruction of the mortise structure. The reinforcing structure for seismic strength of a wooden building according to claim 1.

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