Frame reinforcement structure

Abstract

To improve toughness of a framework structure so that various wooden buildings including traditional wooden buildings can maintain sufficient earthquake resistance and enable aseismatic repair to be securely and easily executed even if error occurs in positions of adjacent frameworks.SOLUTION: A connection part 4 for connecting both ends of an existing column material 2 and a reinforcement frame bar 3 that are adjacent to each other has a main body fitting 40, a rod-like first coupling member 41, and a rod-like second coupling member 42. The main body fitting 40 has an error absorption part to absorb error at positions in horizontal direction between the existing column material 2 and the reinforcement frame bar 3 that are adjacent to each other. A moment resistance joint, which resists an external force when the column material 2 is subjected to the external force, is applied to a junction of the first coupling member 41 to the column material 2. A moment resistance joint, which resists an external force when the reinforcement frame bar 3 is subjected to the external force, is applied to a junction of the second coupling member 42 to the reinforcement frame bar 3.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a frame reinforcement structure. [Background technology]

[0002] In wooden buildings, load-bearing walls are installed to meet the required wall volume in order to resist horizontal loads during earthquakes and typhoons. Such shear walls are constructed by placing braces across the openings between adjacent pillars, or by attaching structural plywood to cover the entire opening between adjacent pillars (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-293367 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when carrying out earthquake-resistant renovations on the framework structures of traditional wooden buildings, such as temple and shrine architecture, large-scale demolition and restoration work is essential. As a result, renovations that have been carried out up until now have tended to be expensive, making renovations difficult for ordinary temples. Therefore, in recent years, there has been a demand for the use of a shear wall structure such as that described in Patent Document 1 in the framework structures of various wooden buildings, including the traditional wooden buildings described above. However, even if a conventional shear wall structure is applied, the strength and rigidity are insufficient when considering the scale and roof weight of various wooden buildings, including the traditional wooden buildings described above. Furthermore, even if conventionally known adhesive panel technology is adopted, the toughness, which is the property required for exhibiting tenacity, may not be sufficient, making it difficult to maintain earthquake resistance.

[0005] Furthermore, in the case of wooden buildings with frame structures that require seismic retrofitting, for example, the spacing between adjacent frames may have widened or narrowed due to aging or past exposure to large external forces, resulting in errors in the position of adjacent frames. In such cases, it is difficult to carry out seismic retrofitting of the frame structure.

[0006] The present invention was made in consideration of the above circumstances, and its objective is to improve the toughness of frame structures, enable various wooden buildings, including traditional wooden buildings, to maintain sufficient earthquake resistance, and further, make it possible to reliably and easily carry out earthquake-resistant retrofitting even if there is an error in the position of adjacent frames. [Means for solving the problem]

[0007] The invention described in claim 1 is a structure for reinforcing an existing framework structure 1 including at least existing pillars 2 adjacent to each other with a gap therebetween, as shown in, for example, FIGS. 1 to 7, a reinforcing frame member 3 disposed between the adjacent existing pillar members 2; and a connecting portion 4 that connects the adjacent existing pillars 2 and both ends of the reinforcing frame material 3, The connecting portion 4 is a main body metal member 40 provided between the adjacent existing pillar members 2 and both ends of the reinforcing frame member 3; A rod-shaped first connecting member 41 that connects the pillar member 2 and the main metal member 40; and a rod-shaped second connecting member 42 that connects the reinforcing frame member 3 and the main metal member 40, The main metal fittings 40 are provided with error absorbing parts that absorb errors in the horizontal positions between the adjacent existing pillars 2 and the reinforcing frame members 3, A moment-resisting joint is applied to the joint of the first connecting member 41 to the pillar 2, which resists an external force when the pillar 2 is subjected to the external force. The joint between the second connecting member 42 and the reinforcing frame member 3 is characterized by the application of a moment-resisting joint that resists external forces when the reinforcing frame member 3 is subjected to such forces.

[0008] According to the invention described in claim 1, a moment-resisting joint that resists an external force when the column 2 is subjected to the external force is applied to the joint of the first connecting member 41 to the column 2, so that the existing frame structure 1 has high toughness in the vicinity of the joint of the first connecting member 41 to the column 2. This improves the toughness of the existing frame structure 1, and therefore it is possible to maintain sufficient earthquake resistance in various wooden buildings, including traditional wooden buildings. Furthermore, the main metal fittings 40 of the connecting parts 4, which are provided between both ends of adjacent existing pillars 2 and reinforcing frame members 3, have error absorption parts that absorb errors in the horizontal position between adjacent existing pillars 2 and reinforcing frame members 3. Therefore, even if an error occurs in the position of adjacent existing pillars 2, for example, if the spacing between adjacent pillars 2 widens or narrows due to aging or being subjected to a large external force in the past, the error can be absorbed by the error absorption parts, and seismic retrofitting of the existing frame structure 1 can be carried out reliably and easily.

[0009] The invention described in claim 2 is, for example, as shown in Figs. 1 to 6, in the frame reinforcement structure described in claim 1, The main body metal part 40 is A first metal fitting 410 is provided on the side of the adjacent existing pillar 2 between both ends of the reinforcing frame 3 and the pillar 2; A second metal fitting 420 is provided on the reinforcing frame material 3 side between the adjacent existing pillar material 2 and both ends of the reinforcing frame material 3; A bolt material 430 that connects the first hardware 410 and the second hardware 420, The first metal piece 430 has a first through-hole 412a formed through the thickness direction of the portion of the first metal piece 410 that is connected to the second metal piece 420, and through which the bolt material 430 is passed. The second metal piece 420 has a second through-hole 422a formed through the thickness direction of the portion of the second metal piece 420 that is connected to the first metal piece 410, and through which the bolt material 430 is passed. At least one of the first through hole 412a and the second through hole 422a is an elongated hole that is longer in the horizontal direction than in the vertical direction, and the elongated hole is the error absorbing portion.

[0010] According to the invention described in claim 2, at least one of the first through hole 412a formed through the thickness of the portion of the first metal 410 that is connected to the second metal 420 and the second through hole 422a formed through the thickness of the portion of the second metal 420 that is connected to the first metal 410 is an elongated hole that is longer horizontally than vertically. Therefore, when the bolt material 430 is passed through the first through hole 412a and the second through hole 422a to connect the first metal 410 and the second metal 420, the horizontal positions of the first metal 410 and the second metal 420 can be adjusted within the length of the elongated hole, and the error absorbing part reliably functions. As a result, even if there is an error in the position of adjacent existing columns 2, the error can be absorbed by the error absorbing part, and seismic retrofitting of the existing frame structure 1 can be performed reliably and easily.

[0011] The invention described in claim 3 is, for example, as shown in FIG. 7, in the frame reinforcement structure described in claim 1, The error absorbing part is characterized by being an adjustment material 440 that is provided between the adjacent existing pillar material 2 and the main metal piece 40, and / or between both ends of the reinforcing frame material 3 and the main metal piece 40 to adjust the gap.

[0012] According to the invention described in claim 3, the error absorption part is an adjustment material 440 that is provided between adjacent existing pillar materials 2 and the main metal fittings 40, or / and between both ends of the reinforcing frame material 3 and the main metal fittings 40, to adjust the gap.Therefore, even if the spacing between adjacent existing pillar materials 2 has widened due to aging or being subjected to a large external force in the past, causing an error in the position of the adjacent existing pillar materials 2, the adjustment material 440 can absorb the error, and seismic retrofitting of the existing frame structure 1 can be carried out reliably and easily.

[0013] The invention described in claim 4 is, for example, as shown in Figs. 1 to 7, in the frame reinforcement structure described in any one of claims 1 to 3, The yield point of the first connecting member 41 is set lower than the yield point of the second connecting member 42 .

[0014] According to the invention described in claim 4, the yield point of the first connecting member 41 is set lower than the yield point of the second connecting member 42, making the first connecting member 41 more susceptible to plastic deformation than the second connecting member 42. Therefore, when a large external force is applied to the frame structure 1, for example, due to an earthquake, the first connecting member 41 will undergo plastic deformation before the second connecting member 42. However, because the first connecting member 41 is moment-resistingly connected to the adjacent first frame member 2, it exhibits toughness and holds up tenaciously even after deformation, making it less likely that other members, including the second connecting member 42, will deform or break. Furthermore, even if a large external force is applied to the frame structure 1 due to an earthquake or other event, if the damage can be limited to the first connecting member 41, repair of the frame structure 1 can be achieved by simply replacing the first connecting member 41, making repairs easy and inexpensive.

[0015] The invention described in claim 5 is, for example, as shown in Figs. 1 to 7, in the frame reinforcement structure described in any one of claims 1 to 4, The second connecting members 42 connect the upper end side and the lower end side at both ends of the reinforcing frame member 3 to the main metal member 40, The first connecting member 41 is characterized in that it is provided along an extension line of the second connecting member 42.

[0016] According to the invention described in claim 5, the first connecting member 41 is arranged along the extension line of the second connecting member 42, so that the first connecting member 41, like the second connecting member 42, can reliably connect adjacent existing pillar members 2 to the main metal fittings 40 in a moment-resisting manner, thereby improving the deformation performance of the frame structure 1. [Effects of the Invention]

[0017] According to the present invention, the toughness of frame structures is improved, and various wooden buildings, including traditional wooden buildings, can maintain sufficient earthquake resistance. Furthermore, earthquake-resistant retrofitting can be carried out reliably and easily even if there is an error in the position of adjacent frames. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing a frame reinforcement structure. [Figure 2] This is an enlarged cross-sectional view showing the main parts of the frame reinforcement structure. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is an oblique view illustrating the configuration of the first metal piece. [Figure 5] FIG. 10 is an oblique view illustrating the configuration of the second metal piece. [Figure 6] FIG. 10 is a perspective view showing a state in which a panel material is provided. [Figure 7] FIG. 10 is an enlarged cross-sectional view showing a modified example of a main part in a frame reinforcement structure. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples. Note that the directions in the following embodiments and illustrated examples are set solely for the convenience of explanation.

[0020] In Figure 1, reference numeral 1 indicates an existing reinforced frame structure. This frame structure 1 is primarily considered to be one that constitutes a traditional wooden building, such as temple or shrine architecture, but is not limited to this. For example, it may be a frame structure that constitutes a relatively large wooden building, such as a mid-rise or high-rise wooden building or a wooden building with a large total floor area, or it may be a frame structure that constitutes a relatively small wooden building, such as a detached house. Furthermore, although this framework structure 1 is primarily intended for the renovation (remodeling) of wooden buildings, it is not limited to this and may also be applied to newly constructed buildings. When a framework structure 1 is used to construct a traditional wooden building, such as a temple or shrine, the roof is often heavy, and in the event of a major earthquake, there is a high possibility that the roof will crush the main hall and cause collapse due to story collapse. For this reason, existing framework structures 1 require earthquake resistance renovation.

[0021] The frame structure 1 in this embodiment is erected on lower structural members such as foundations, beams, bases, and floors, and is topped by upper structural members such as beams, floors, and walls (including load-bearing walls) of the upper floors. In other words, the frame structure 1 is sandwiched between the lower structural members and the upper structural members. Such a frame structure 1 comprises existing pillar members 2 adjacent to each other with a gap between them, reinforcing frame members 3, connecting portions 4, upper and lower frame members 5, splices 6, and panel members 7.

[0022] First, the existing pillar material 2 will be described. When the existing pillars 2 are part of a traditional wooden building such as temple and shrine architecture, the framework structure 1 may include lower cross members called ashigatari that connect the lower ends of adjacent existing pillars 2, upper cross members called torinuki that connect the upper ends of adjacent existing pillars 2, and supporting members called togumo that are provided between the adjacent existing pillars 2 and a beam (superstructure member) called a load-bearing girder located above the framework structure 1. In this case, the existing pillars 2 may be erected on foundation stones.

[0023] The existing pillar material 2 is made of structural laminated timber that is longer in the vertical direction than in the horizontal direction (horizontal and left-right directions) and is formed into a square shape in a horizontal cross section. In this embodiment, structural laminated timber is used as the pillars 2, but ordinary square timber (lumber) or pillars made of LVL (Laminated Veneer Lumber) may also be used. In other words, the first frame members 2 are wooden pillar-shaped members. Furthermore, the cross-sectional shape does not have to be square, and may be rectangular or circular (circular or oval).

[0024] The existing pillars 2 are formed with a plurality of connecting insertion holes 2a through which first connecting members and second connecting members are passed to set up a plurality of reinforcing frame members 3 between these existing pillars 2, and a plurality of connecting insertion holes 2b through which bolt members are passed to set up the upper and lower frame members 5. The connecting insertion holes 2a, 2b are formed penetrating the existing pillar material 2 in the left-right direction (horizontal direction) at positions where multiple reinforcing frame materials 3 and upper and lower frame materials 5 are provided.

[0025] Furthermore, the existing pillars 2 may be joined to the lower and upper structural members by rods such as steel bars, bolts, long bolts, etc. That is, insertion holes 2c into which one end of the rod is inserted are formed on the upper and lower end faces of the existing pillars 2, and insertion holes into which the other ends of the rods are inserted are also formed in the lower and upper structural members. As the rod material, a long rod material with an uneven surface, such as a deformed steel bar or a fully threaded bolt, is preferably used. Furthermore, a method called glued-in rod (GIR) is used to join the pillars 2 to the substructure and superstructure using rods. This method involves filling the gaps between the rods and the insertion holes 2c on the pillar 2 side, and between the rods and the insertion holes on the substructure and superstructure sides, with adhesive, and as the adhesive hardens, stress is transmitted via the adhesive force of the adhesive and the rods, generating joint strength. In other words, there are gaps between the rods and each insertion hole 2c, and without adhesive, the rods will not be joined to the pillars 2 or the substructure and superstructure sides. In this embodiment, the above-mentioned glued-in rod method is used to join the existing pillar material 2 to the lower structural material and upper structural material using rod material, but other methods may also be used, such as using metal fittings for joining.

[0026] The existing pillar 2 has a plurality of connection insertion holes 2a formed therethrough in the left-right direction, into which first connection members 41 (described later) of the connection portion 4 are inserted. More specifically, the multiple connecting insertion holes 2a are formed penetrating from mutually opposing side surfaces (hereinafter referred to as inner side surfaces 2d) of adjacent existing pillars 2 to mutually parallel, non-opposing side surfaces (hereinafter referred to as outer side surfaces 2e) of adjacent existing pillars 2 opposite the inner side surfaces 2d. Furthermore, the multiple connecting insertion holes 2a are formed corresponding to the positions of the upper and lower end sides of the main metal member 40 (described later) in the connecting portion 4, and multiple (two in this embodiment) are formed side by side in the thickness direction of the framework structure 1.

[0027] In addition, the outer surface 2e of the existing pillar material 2 is formed with a plurality of recesses 2f into which rectangular washers 41c (described later) provided as a set with the first connecting material 41 in the connecting portion 4 are fitted.

[0028] Next, the reinforcing frame material 3 will be described. The reinforcing frame material 3 is a structural laminated timber that is longer in the horizontal direction (horizontal direction / left-right direction) than in the vertical direction and is placed between adjacent existing pillar materials 2. In addition, it is formed into a vertically long rectangular shape in a vertical cross section. In this embodiment, structural laminated timber is used as the reinforcing frame material 3, but ordinary square timber (lumber) or pillar material such as LVL (Laminated Veneer Lumber) or CLT (Cross Laminated Timber) may also be used. In other words, the reinforcing frame material 3 is a wooden cross member. Furthermore, the cross-sectional shape does not have to be a vertically elongated rectangle. Furthermore, a plurality of reinforcing frame members 3 are provided for the framework structure 1, and these multiple reinforcing frame members 3 are arranged at intervals in the length direction of adjacent pillar members 2. In other words, the framework structure 1 in this embodiment is formed in a roughly parallel cross (or ladder) shape by the adjacent pillar members 2 and the multiple reinforcing frame members 3. In this embodiment, the number of the reinforcing frame members 3 is three, but this is not limited to this and can be changed as appropriate within the scope of the present invention.

[0029] At both ends of the reinforcing frame material 3, a plurality of connection insertion holes 3a are formed in the left-right direction, into which second connection materials 42 (described later) of the connection portion 4 are inserted. More specifically, the multiple connection insertion holes 3a are formed without penetrating from both longitudinal end faces toward the center of the reinforcing frame material 3. Furthermore, these multiple connection insertion holes 3a are formed in multiples on the upper end side and the lower end side of both longitudinal end faces of the reinforcing frame material 3. The multiple connection insertion holes 3a on the upper end side and the lower end side are formed in multiples (two in this embodiment) lined up in the thickness direction of the framework structure 1.

[0030] Next, the connecting portion 4 will be described. The connecting portion 4 is a metal connecting means that connects adjacent existing pillar materials 2 and both ends of the reinforcing frame material 3, and as shown in Figures 2 to 5, has a split main body metal member 40, a rod-shaped first connecting material 41, and a rod-shaped second connecting material 42.

[0031] The main metal fitting 40 is provided between both ends of adjacent existing pillar materials 2 and reinforcing frame materials 3, and is of a split type as described above, and comprises a first metal fitting 410, a second metal fitting 420, and a bolt material 430 that connects the first metal fitting 410 and the second metal fitting 420. In other words, the main metal fitting 40 is split into a first metal fitting 410 side and a second metal fitting 420 side, and is used by being joined by the bolt material 430. In addition, such a main metal member 40 further includes an error absorbing portion (described later) that absorbs errors in the horizontal positions between adjacent existing pillar members 2 and reinforcing frame members 3.

[0032] The first metal fitting 410 is a metal fitting provided on the side of the adjacent existing pillar 2 between both ends of the reinforcing frame material 3 and the pillar 2. The second metal fittings 420 are metal fittings provided on the reinforcing frame material 3 side between the adjacent existing pillar materials 2 and both ends of the reinforcing frame material 3. The bolt material 430 is a high-strength bolt with a hexagonal head, and is used together with a nut 431 that is screwed onto the tip of the main body shaft.

[0033] The first connecting member 41 is a bolt that connects the pillar 2 and the first hardware 410 of the main hardware 40, and has a main shaft with a male thread formed on the outer surface of the tip, and a head 41a with a larger diameter than the main shaft. The first connecting member 41 is used as a set with a nut 41b and a washer 41c. The washer 41c is fitted into a recess 2f formed in the pillar 2.

[0034] The second connecting member 42 is a stud bolt without a head that connects the reinforcing frame member 3 and the second metal member 420 of the main metal member 40, and has a male thread formed on the entire outer surface or on one end. Most of the thread is embedded in the connecting insertion hole 3a formed in the reinforcing frame member 3. The second connecting member 42 is used in combination with a nut 42a.

[0035] Here, the configuration of the first metal piece 410 and the second metal piece 420 will be described in more detail.

[0036] 4, the first metal piece 410 is a metal piece formed by welding a fixed plate portion 411, a joining plate portion 412, an end plate portion 413, and a rib plate portion 414. The first metal piece 410 is formed into a T-shape by the fixed plate portion 411 and the joining plate portion 412 in a plan view.

[0037] The fixing plate portion 411 is a portion that is fixed to the inner surface 2d of the pillar 2, and has a plurality of bolt holes 411a and a plurality of screw holes 411b. The plurality of bolt holes 411a are through holes through which the first connecting members 41 are passed, and are arranged to correspond to the positions of the connecting insertion holes 3a in the reinforcing frame member 3 and the first connecting members 41. The multiple screw holes 411b are through holes through which screws are passed to temporarily fasten the fixing plate portion 411 to the inner surface 2d of the pillar 2. The screws may be left in place after the first metal member 410 is permanently fixed to the pillar 2 by the first connecting member 41.

[0038] The joining plate portion 412 is a portion that contacts the second metal fitting 420 and is joined to the second metal fitting 420 by a bolt material 430, and is provided perpendicular to the inner surface of the fixing plate portion 411 (the surface facing the second metal fitting 420). A plurality of first through holes 412a through which the main shafts of the bolt materials 430 are passed are formed in the joining plate portion 412. These first through holes 412a are elongated holes that are longer in the horizontal direction than in the vertical direction, and these elongated holes function as the error absorbing portions.

[0039] The end plate portions 413 are joined to the upper and lower end surfaces of the joining plate portion 412 and also to the upper and lower ends of the fixing plate portion 411, thereby improving the attachment strength of the joining plate portion 412 to the fixing plate portion 411. The end plate portions 413 are formed in the shape of an isosceles triangle or an equilateral triangle.

[0040] The rib plate portion 414 is joined to the side surfaces of the connecting plate portion 412 (the surfaces on the front and back sides of the framework structure 1) and also joined to the inner surface of the fixing plate portion 411 (the surface on the side of the second metal fitting 420), thereby improving the attachment strength of the connecting plate portion 412 to the fixing plate portion 411. The rib plate portion 414 is formed in the shape of a right triangle, and the right angle portion is located at the inside corner between the fixing plate portion 411 and the connecting plate portion 412.

[0041] The dimensions of the end plates 413 and rib plates 414 (ends on the front and back sides of the post-and-beam structure 1) are set so that they do not reach the ends of the fixing plates 411 (ends on the front and back sides of the post-and-beam structure 1). This is to make it easier to drive screws into the multiple screw holes 411b formed in the ends of the fixing plates 411 and to ensure a rotation range (rotation angle) of a tool such as a wrench used when attaching nuts 41b to the tips of the first connecting members 41. In other words, the first metal fittings 410 are fixed to the inner surface 2d of the existing pillar material 2 at the site.

[0042] The multiple first through holes 412a formed in the joining plate portion 412 are provided at a height position substantially equal to that of the multiple bolt holes 411a formed in the fixing plate portion 411. The multiple first through holes 412a are also arranged in the region between the upper end portion plate portion 413 and the upper rib plate portion 414, and in the region between the lower end portion plate portion 413 and the lower rib plate portion 414.

[0043] 5, the second metal piece 420 is a metal piece formed by welding a fixing plate portion 421, a joining plate portion 422, and a rib plate portion 424. The second metal piece 420 is formed into an L-shape in a plan view by the fixing plate portion 421 and the joining plate portion 422. 3 and other figures, the second metal pieces 420 are provided on both the front and back sides of the first metal piece 410. In other words, the first metal piece 410 is provided so as to be sandwiched between the two second metal pieces 420. A gap equal to the thickness of the joining plate portion 412 of the first metal piece 410 is formed between the two second metal pieces 420.

[0044] The fixing plate portion 421 is a portion that is fixed to the inner surface 2d of the pillar 2, and has a plurality of bolt holes 421a. The plurality of bolt holes 421a are through holes through which the second connecting members 42 are passed, and are arranged corresponding to the positions of the connecting insertion holes 2a in the pillar 2 and the second connecting members 42.

[0045] The joining plate portion 422 is a part that contacts the front or back side of the joining plate portion 412 of the first metal fitting 410 and is joined to the first metal fitting 410 by bolt material 430, and is arranged perpendicular to the outer surface of the fixing plate portion 421 (the surface facing the first metal fitting 410). The joining plate portion 422 is formed in a U-shape (concave shape) when viewed from the front. That is, the joining plate portion 422 has a pair of protruding portions 422b that protrude long from the outer surface of the fixing plate portion 421 toward the first metal member 410, and a reinforcing portion 422c that is integrally formed between the pair of protruding portions 422b and reinforces the pair of protruding portions 422b. Furthermore, a plurality of second through holes 422a are formed in the pair of protruding portions 422b of the joining plate portion 422, through which the main shafts of the bolt materials 430 are passed. In this embodiment, the plurality of second through holes 422a are circular holes, but they may be elongated holes (error absorbing portions) that are longer in the horizontal direction than in the vertical direction. When the plurality of second through holes 422a are elongated holes, the plurality of first through holes 412a may be circular holes or elongated holes. When both the first through holes 412a and the second through holes 422a are elongated holes, the dimension that can absorb the horizontal positional error between adjacent existing pillar materials 2 and reinforcing frame materials 3 can be increased.

[0046] The rib plate portion 424 is joined to the upper and lower edges of the side surfaces (the surfaces on the front or rear side of the framework structure 1) of the pair of protrusions 422b of the joining plate portion 422, and is also joined to the outer surface (the surface on the first metal fitting 410 side) of the fixing plate portion 421, thereby improving the attachment strength of the joining plate portion 422 to the fixing plate portion 421. The rib plate portion 424 is formed in the shape of a right triangle, and the right angle portion is located at the inside corner between the fixing plate portion 421 and the joining plate portion 422.

[0047] The multiple second through holes 422a formed in the joining plate portion 422 are provided at a height position substantially equal to that of the multiple bolt holes 421a formed in the fixing plate portion 421. The multiple second through holes 422a are also arranged in the region between the two upper rib plate portions 424 and the region between the two lower rib plate portions 424. That is, the multiple second through holes 422a are formed in a pair of protrusions 422b of the joining plate portion 422.

[0048] The first metal fitting 410 configured as described above is fixed to the inner surfaces 2d of the adjacent existing pillar materials 2 by a plurality of first connecting materials 41. To explain in more detail, when the first metal fitting 410 is fixed to the inner surface 2d of the pillar material 2 using multiple first connecting materials 41, the washer 41c, the pillar material 2, and the fixing plate portion 411 of the first metal fitting 410 are sandwiched between the head 41a of the first connecting material 41 and the nut 41b. In this embodiment, the head 41a is located on the washer 41c side, and the nut 41b is located on the first metal fitting 410 side. The tip end of the main body shaft of the first connecting member 41 is located on the inner surface 2d of the fixing plate portion 411 of the first metal fitting 410, and the nut 41b is also screwed onto the tip end of the main body shaft of the first connecting member 41 and is located on the inner surface 2d of the fixing plate portion 411.

[0049] The portion of the first connecting member 41 that is inserted into the connecting insertion hole 2a in the pillar 2 simply passes through the connecting insertion hole 2a, and is joined to the pillar 2 by tightening the nut 41b on the main body shaft. In other words, the first connecting member 41 functions as a so-called tension bolt. As a result, when an external force is applied to the pillar 2, the joint between the first connecting member 41 and the pillar 2 functions as a moment-resisting joint that resists the external force. Therefore, the vicinity of the joint between the first connecting member 41 and the pillar 2 in the framework structure 1 has high toughness. Here, toughness refers to the property of exhibiting tenacity that prevents a significant decline in the functionality of the frame structure 1 even after deformation due to an external force occurs to the frame structure 1. Such toughness is ensured by connecting adjacent existing columns 2 to the reinforcing frame members 3 via the connecting parts 4, and by connecting the first connecting members 41 to the adjacent columns 2 in a moment-resisting manner.

[0050] The second metal fitting 420 configured as described above is fixed to both end surfaces (on the first metal fitting 410 side) of the reinforcing frame material 3 in the length direction by a plurality of second connecting members 42. More specifically, the second connecting member 42 is embedded in a connecting insertion hole 3a formed in the reinforcing frame member 3. One end of the second connecting member 42 (the end that protrudes toward the first metal fitting 410) is disposed on the outer surface (the surface on the first metal fitting 410 side) of the fixing plate portion 421 of the second metal fitting 420, and a nut 42a is also screwed onto one end of the second connecting member 42 and disposed on the outer surface of the fixing plate portion 421.

[0051] The portion of the second connecting member 42 that is embedded in the connecting insertion hole 3a in the reinforcing frame member 3 is joined to the reinforcing frame member 3 using the glue-in rod method described above. That is, adhesive is filled into the gap between the second connecting member 42 and the connecting insertion hole 3a on the reinforcing frame member 3 side, and as the adhesive hardens, stress is transmitted via the adhesive force of the adhesive and the second connecting member 42, generating joint strength. As a result, a moment-resisting joint is applied to the joint between the second connecting member 42 and the reinforcing frame member 3, which resists external force when the reinforcing frame member 3 is subjected to the external force. Therefore, the area of ​​the framework structure 1 near the joint between the second connecting member 42 and the reinforcing frame member 3 has high toughness. Such toughness is ensured by connecting adjacent existing pillars 2 to the reinforcing frame members 3 by the connecting portions 4, and by connecting the second connecting members 42 to the reinforcing frame members 3 in a moment-resisting manner.

[0052] Furthermore, the protrusion 422b of the joining plate portion 422 of the second metal piece 420 is disposed in an area sandwiched between the end plate portion 413 and the rib plate portion 414 on the front and back sides of the joining plate portion 412 of the first metal piece 410. By disposing them in this manner, the positions of the multiple second through holes 422a formed in the protrusion 422b of the joining plate portion 422 of the second metal piece 420 coincide with the positions of the multiple first through holes 412a formed in the joining plate portion 412 of the first metal piece 410. Therefore, the bolt material 430 can be passed through the multiple first through holes 412a and the multiple second through holes 422a at the same time. As described above, the multiple first through holes 412a are elongated holes that are long in the horizontal direction, and therefore the distance between the first metal piece 410 and the second metal piece 420 can be adjusted along the length of these multiple first through holes 412a.

[0053] When the nut 431 is screwed onto the tip of the bolt material 430 and tightly fastened, a strong frictional force is generated between the joining plate portion 412 of the first metal member 410 and the joining plate portion 422 of the second metal member 420. Therefore, by tightly fastening the bolt material 430, the connection strength between the adjacent existing pillar material 2 and reinforcing frame material 3 can be improved.

[0054] Next, the upper and lower frame members 5 will be described. The upper and lower frame members 5 are provided at the upper and lower ends of adjacent existing pillars 2, respectively, and connect the upper ends and lower ends of adjacent existing pillars 2 to each other. The upper and lower frame materials 5 are structural laminated timber that are longer in the horizontal direction (lateral direction, left and right direction) than in the vertical direction, and are formed in a rectangular shape in vertical cross section. The upper and lower frame members 5 may be provided not only at the upper and lower ends of adjacent existing pillars 2 but also at the vertical intermediate portions of adjacent existing pillars 2, etc.

[0055] At both ends of the upper and lower frame members 5, a plurality of connecting insertion holes are formed, into which a plurality of rods 5a are inserted to join the ends of the upper and lower frame members 5 to the adjacent existing columns 2. Furthermore, at the upper and lower ends of the adjacent existing columns 2, a plurality of connecting insertion holes 2b are formed, into which the plurality of rods 5a are inserted. These connecting insertion holes 2b are through-holes that penetrate the columns 2 in the left-right direction. The positions of the connecting insertion holes formed in the upper and lower frame members 5 are aligned with the positions of the connecting insertion holes 2b formed in the adjacent existing columns 2. Therefore, the plurality of rods 5a can be inserted toward the upper and lower frame members 5 from the left side surface of the left column 2 and the right side surface of the right column 2. Furthermore, the adjacent existing columns 2 and the upper and lower frame members 5 are moment-resistingly joined by the plurality of rods 5a using a glued-in rod method. In addition, if the adjacent existing pillar materials 2 are part of a traditional wooden building such as temple and shrine architecture, the upper and lower frame materials 5 do not need to be used.

[0056] Next, the splice 6 will be described. The splice 6 is a piece of wood that is provided along the inner surface 2d of the adjacent existing pillars 2 and that contacts the top and bottom end faces of the main metal member 40 (first metal member 410) at the connecting portion 4. The splice 6 contacts the top and bottom end faces of the main metal member 40, thereby preventing the main metal member 40 from sliding vertically or rotating vertically. Furthermore, the front surface of the support piece 6 and the surface (front surface) of the existing pillar material 2 are flush with each other, and furthermore, the back surface of the support piece 6 and the surface (back surface) of the existing pillar material 2 are also flush with each other.

[0057] Next, the panel material 7 will be described. The panel material 7 is a rectangular board material made of plywood, particle board, OSB (Oriented Strand Board), or the like. The width dimension (left-right dimension) of such panel material 7 is set to be longer than the spacing dimension between adjacent existing pillar materials 2, and the panel material 7 is provided and adhered across the front and back faces of adjacent existing pillar materials 2 that are arranged on the same vertical plane. By providing such panel material 7 by being attached to the surface of the frame structure 1, the frame structure 1 can function as a load-bearing wall. The panel material 7 may be a single large piece, or the panel material 7 may be divided into a plurality of pieces that are arranged vertically and provided between adjacent existing pillar materials 2. The panel material 7 may also be in contact with the front and rear surfaces of the upper and lower frame materials 5 and joined by adhesive. The panel material 7 is joined to the existing pillar material 2, the upper and lower frame materials 5, and the support wood 6 by adhesive bonding, but this is not limited to this and the panel material 7 may be fixed and joined with fasteners such as nails, taking into consideration ease of internal maintenance. Furthermore, when multiple divided panel materials 7 are arranged vertically, panel materials 7 joined by adhesive and panel materials 7 joined by fasteners may be mixed. Furthermore, in some cases, such as in areas where openings are formed, panel materials 7 may not be provided in some places.

[0058] In addition, traditional wooden buildings, such as temples and shrines, are sometimes constructed using the Shinkabe method. In such cases, the width of the splice 6 may be shortened to make it narrower, and the panel material 7 may be installed across the front and back surfaces of the splice 6. When the panel material 7 is installed in this manner, the surface of the panel material 7 is positioned recessed from the surfaces of the adjacent existing pillar materials 2, making it possible to create the appearance of a wall constructed using the Shinkabe method.

[0059] Furthermore, the reinforcing frame material 3 and the second metal fittings 420 of the main metal fittings 40 provided at both ends of this reinforcing frame material 3 are connected in advance at a factory or the like by a plurality of second connecting members 42 before the seismic retrofitting of the frame structure 1. This allows the reinforcing frame material 3 and both second metal fittings 420 to be handled as a single member. Furthermore, the joint with the first metal fitting 410 is a joint plate portion 422 that protrudes perpendicularly from the fixing plate portion 412. Therefore, even if the reinforcing frame material 3 and both second metal fittings 420 are connected in advance to form a single member, the first connecting member 41 can reliably connect the first metal fitting 410 to the column material 2. In other words, connecting the reinforcing frame material 3 and both second metal fittings 420 in advance to form a single member does not interfere with the installation of the first connecting member 41, and can improve workability on site.

[0060] The frame structure 1 configured as described above is incorporated into various types of wooden buildings, including traditional wooden buildings such as temple and shrine architecture, and relatively large-scale wooden buildings such as mid-rise and high-rise buildings and buildings with large floor areas. For example, when the frame structure 1 is subjected to a strong external force (horizontal force) due to an earthquake or typhoon, adjacent existing columns 2 tend to move and tilt in the same direction. To prevent this movement of the existing columns 2, if reinforcing frame members 3 are provided between adjacent existing columns 2, the movement of the adjacent existing columns 2 toward the same direction can be suppressed. In addition, both ends of adjacent existing pillar materials 2 and reinforcing frame materials 3 are connected by connecting portions 4, and the multiple first connecting members 41 and multiple second connecting members 42 that make up the connecting portions 4 are arranged in a line in the longitudinal direction (vertical direction) of the existing pillar materials 2, so these multiple first connecting members 41 and multiple second connecting members 42 can also suppress the movement of adjacent existing pillar materials 2 to tilt in the same direction.

[0061] Furthermore, in the frame structure 1, the rigidity of the first connecting member 41 is set lower than the rigidity of the second connecting member 42. In other words, the first connecting member 41 is more susceptible to deformation than the second connecting member 42. Therefore, when a large external force is applied to the reinforced frame structure 1 due to, for example, an earthquake, the first connecting member 41 will deform before the second connecting member 42. However, because the first connecting member 41 is connected to the adjacent existing column 2 in a moment-resisting manner, it exhibits toughness and tenaciously holds up even after deformation, thereby preventing deformation or damage to the second connecting member 42 and other members. Even if a large external force is applied to the frame structure 1 due to an earthquake or the like, if the damage can be limited to the first connecting member 41, repair of the frame structure 1 can be achieved by simply replacing the first connecting member 41. In order to create the difference in rigidity as described above, bolts made of different materials and of different sizes are used for the first connecting member 41 and the second connecting member 42. For example, steel bolts are used for the first connecting member 41, and titanium bolts are used for the second connecting member 42.

[0062] Furthermore, in the frame structure 1, the rigidity of the first connecting member 41 is set lower than the rigidity of the bolt material 430 that connects the first metal member 410 and the second metal member 420. In other words, the first connecting member 41 is more easily deformed than the bolt material 430. Therefore, when a large external force is applied to the reinforced frame structure 1 due to, for example, an earthquake, the first connecting member 41 deforms before the bolt material 430. The rigidity of the second connecting material 42 and the rigidity of the bolt material 430 may be set to be lower or equal to each other.

[0063] In this embodiment, the nuts 41b of the first connecting members 41 are disposed on the inner surface of the first hardware 410, so that if the post-and-beam structure 1 is subjected to a large external force and the first connecting members 41 are deformed, for example, the first connecting members 41 can be replaced by removing them from the outer surface 2e of the pillars 2. The first hardware 410 is supported from below by the splices 6 and is sandwiched between the splices 6 above, so that the first hardware 410 will not fall off even if all of the multiple first connecting members 41 are removed during the replacement work of the first connecting members 41. In addition, if a panel material 7 is attached to the surface of the framework structure 1, the panel material 7 is removed before the first connecting material 41 is replaced.

[0064] According to this embodiment, a moment-resisting joint that resists an external force when the column 2 is subjected to the external force is applied to the joint of the first connecting member 41 to the column 2, and therefore the existing frame structure 1 has high toughness in the vicinity of the joint of the first connecting member 41 to the column 2. This improves the toughness of the existing frame structure 1, and therefore allows various wooden buildings, including traditional wooden buildings, to maintain sufficient earthquake resistance. Furthermore, the main metal fittings 40 of the connecting parts 4, which are provided between both ends of adjacent existing pillars 2 and reinforcing frame members 3, have error absorption parts that absorb errors in the horizontal position between adjacent existing pillars 2 and reinforcing frame members 3. Therefore, even if an error occurs in the position of adjacent existing pillars 2, for example, if the spacing between adjacent pillars 2 widens or narrows due to aging or being subjected to a large external force in the past, the error can be absorbed by the error absorption parts, and seismic retrofitting of the existing frame structure 1 can be carried out reliably and easily.

[0065] Furthermore, at least one of the first through hole 412a formed through the thickness of the portion of the first metal 410 that is connected to the second metal 420 and the second through hole 422a formed through the thickness of the portion of the second metal 420 that is connected to the first metal 410 is an elongated hole that is longer horizontally than vertically, so that when the bolt material 430 is passed through the first through hole 412a and the second through hole 422a to connect the first metal 410 and the second metal 420, the horizontal positions of the first metal 410 and the second metal 420 can be adjusted within the length of the elongated hole, and the error absorbing part functions reliably. As a result, even if an error occurs in the position of adjacent existing pillars 2, the error can be absorbed by the error absorbing part, making it possible to reliably and easily perform seismic retrofitting of the existing frame structure 1.

[0066] Furthermore, because the yield point of the first connecting member 41 is set lower than the yield point of the second connecting member 42, the first connecting member 41 is more susceptible to plastic deformation than the second connecting member 42. Therefore, when a large external force is applied to the frame structure 1, for example, due to an earthquake, the first connecting member 41 will plastically deform before the second connecting member 42. However, because the first connecting member 41 is moment-resistingly connected to the adjacent first frame member 2, it exhibits toughness and holds up tenaciously even after deformation, making it less likely that other members, including the second connecting member 42, will deform or break. Furthermore, even if a large external force is applied to the frame structure 1 due to an earthquake or other event, if the damage can be limited to the first connecting member 41, repair of the frame structure 1 can be achieved by simply replacing the first connecting member 41, making repairs easy and inexpensive even if damage does occur.

[0067] Furthermore, since the first connecting member 41 is arranged along the extension line of the second connecting member 42, the first connecting member 41, like the second connecting member 42, can reliably connect adjacent existing pillar members 2 to the main metal fittings 40 in a moment-resisting manner, thereby improving the deformation performance of the frame structure 1.

[0068] [Modification] It should be noted that the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. Modifications will be described below. The following modifications may be combined as much as possible. In the following modifications, elements common to the above-described embodiments will be assigned the same reference numerals, and descriptions thereof will be omitted or simplified.

[0069] In the above embodiment, at least one of the first through hole 412a and the second through hole 422a is a long hole that is longer in the horizontal direction than in the vertical direction, and the long hole is an error absorbing portion that absorbs the error in the horizontal position between adjacent existing pillar materials 2 and reinforcing frame materials 3. In contrast, the error absorbing portion in this modified example is an adjustment material 440 that is provided between adjacent existing pillar materials 2 and the main metal fittings 40 (fixing plate portions 411 of the first metal fittings 410) to adjust the gap, as shown in Fig. 7. In other words, adjacent existing pillar materials 2 may become spaced apart due to aging or being subjected to large external forces in the past, but the adjustment material 440 can fill the gap between the members that occurs when the space between the adjacent pillar materials 2 becomes wider (the gap between the adjacent existing pillar materials 2 and the main metal fittings 40, and the gap between the reinforcing frame material 3 and the main metal fittings 40).

[0070] The adjustment member 440 is a plate member provided between the existing pillar member 2 and the fixing plate portion 411 of the first metal member 410 in the main metal member 40, and in this modified example, a rectangular metal plate member is used. The adjustment member 440 is fixed to the inner surface 2d of the pillar member 2, and has a plurality of bolt holes and a plurality of screw holes. The multiple bolt holes are through holes through which the first connecting material 41 is passed, and are arranged corresponding to the positions of the multiple bolt holes 411a formed in the fixing plate portion 411 of the first metal fitting 410, through which the first connecting material 41 is passed. The multiple screw holes are through holes through which screws are passed for temporarily fixing the adjustment material 440 to the inner surface 2d of the pillar material 2 and for temporarily fixing the fixing plate portion 411 of the first metal fitting 410 to the inner surface 2d of the pillar material 2. The screws may be left in place after the adjustment material 440 has been permanently fixed to the pillar material 2 by the first connecting material 41.

[0071] In this modified example, the width dimension of the adjustment material 440 is set to be approximately equal to the width dimension of the inner surface 2d of the pillar material 2, and the vertical dimension is set to be approximately equal to the vertical dimension of the fixing plate portion 411 of the first metal fitting 410. However, the present invention is not limited to this, and the width dimension of the adjustment member 440 may be set to be approximately equal to the width dimension of the fixing plate portion 411 of the first metal member 410.

[0072] Furthermore, although the adjustment members 440 in this modification are provided between adjacent existing pillar members 2 and the main metal members 40, they may also be provided between both end portions of the reinforcing frame member 3 and the main metal members 40 (the fixing plate portions 421 of the two second metal members 420). In this case, the width dimension of the adjustment member 440 is set to be approximately equal to the width dimension of the longitudinal side end faces of the reinforcing frame member 3, and the vertical dimension is set to be approximately equal to the vertical dimension of the longitudinal side end faces of the reinforcing frame member 3. Furthermore, the multiple screw holes are arranged corresponding to the positions of the multiple bolt holes 421a formed in the fixing plate portions 421 of the two second metal members 420, and the second connecting members 42 are passed through them.

[0073] In addition, the adjustment material 440 may be provided not only between adjacent existing pillar materials 2 and the main metal fittings 40, but also between both ends of the reinforcing frame material 3 and the main metal fittings 40, or both.

[0074] According to this modified example as described above, the error absorption section is an adjustment material 440 that is provided between adjacent existing pillars 2 and the main metal fittings 40, or / and between both ends of the reinforcing frame material 3 and the main metal fittings 40, to adjust the gap. Therefore, even if the spacing between adjacent pillars 2 widens due to aging or being subjected to a large external force in the past, causing an error in the position of the adjacent existing pillars 2, the adjustment material 440 can absorb the error, and seismic retrofitting of the existing frame structure 1 can be carried out reliably and easily. [Explanation of symbols]

[0075] 1 axis structure 2 Pillar material 2a Connection insertion hole 2d inner surface 2F Recess 3 Reinforcement frame material 3a Connection hole 4 Connecting part 40 Main body hardware 410 First Metal 411 Fixed plate part 412 Joint plate part 412a First through hole (error absorption part) 420 Second metal fittings 421 Fixed plate part 422 Joint plate part 422a Second through hole 430 Bolt material 440 Adjustment material (error absorption part) 41 First connection material 42 Second connection material

Claims

1. A structure for reinforcing an existing framework structure that includes at least existing pillars adjacent to each other at intervals, a reinforcing frame material disposed between the adjacent existing pillar materials; and connecting portions that connect the adjacent existing pillars and both ends of the reinforcing frame material, The connecting portion is a main metal member provided between the adjacent existing pillars and both ends of the reinforcing frame member; A rod-shaped first connecting member that connects the pillar material and the main metal body; and a rod-shaped second connecting member that connects the reinforcing frame member and the main metal member, The main metal member is provided with an error absorbing portion that absorbs horizontal positional errors between the adjacent existing pillar members and the reinforcing frame members, A moment-resisting joint that resists an external force when the column is subjected to the external force is applied to the joint of the first connecting member to the column, A frame reinforcement structure characterized in that a moment-resisting joint is applied to the joint between the second connecting member and the reinforcing frame member, which resists external forces when the reinforcing frame member is subjected to the external forces.

2. The frame reinforcement structure according to claim 1, The main body metal part is A first metal fitting is provided on the pillar side between the adjacent existing pillars and both ends of the reinforcing frame material; A second metal fitting is provided on the reinforcing frame side between the adjacent existing pillars and both ends of the reinforcing frame; A bolt material that connects the first metal fitting and the second metal fitting, The first metal fitting has a first through hole formed through the thickness direction of the portion of the first metal fitting that is connected to the second metal fitting, and through which the bolt material is passed, The second metal fitting has a second through hole formed through the thickness direction of the portion of the second metal fitting that is connected to the first metal fitting, and through which the bolt material is passed, A frame reinforcement structure characterized in that at least one of the first through hole and the second through hole is a long hole that is longer in the horizontal direction than in the vertical direction, and the long hole is the error absorption portion.

3. The frame reinforcement structure according to claim 1, A frame reinforcement structure characterized in that the error absorption part is an adjustment material that adjusts the gap between the adjacent existing pillar materials and the main metal fittings, and / or between both ends of the reinforcing frame material and the main metal fittings.

4. The frame reinforced structure according to any one of claims 1 to 3, A frame reinforcement structure characterized in that the yield point of the first connecting member is set lower than the yield point of the second connecting member.

5. The frame reinforced structure according to any one of claims 1 to 4, The second connecting member connects the upper end side and the lower end side at both ends of the reinforcing frame member to the main metal member, A frame reinforcement structure characterized in that the first connecting member is arranged along the extension line of the second connecting member.

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