JP2024073617A - Wall structure and construction method of wall structure - Google Patents

Abstract

[Problem] To provide a wall structure with excellent workability and a method for constructing the wall structure. [Solution] The wall structure is formed by joining a frame 2 having columns 21 and beams to a wooden earthquake-resistant wall 3 surrounded by the frame 2. In the wall structure, the wooden earthquake-resistant wall 3 and the frame 2 are joined using a joint metal 41 having a perforated steel plate 411 and fixed to the frame 2. The wooden earthquake-resistant wall 3 is formed by arranging two wooden boards 31 so that their plate surfaces face each other. A solidifying material 43 is filled between the frame 2 and the wooden earthquake-resistant wall 3, and the frame 2 and the wooden earthquake-resistant wall 3 are joined via a perforated steel plate 411 protruding from the frame 2 into the space between the two wooden boards 31. The perforated steel plate 411 is sandwiched between the two wooden boards 31, and a gap is provided between the two wooden boards 31 at a position different from the perforated steel plate 411. When viewed along the out-of-plane direction of the frame 2, the entire portion of the metal joint 41 between the frame 2 and the wooden earthquake-resistant wall 3 is covered with the solidification material 43. [Selected Figure] Figure 2

Description

The present invention relates to a wall structure and a construction method for a wall structure.

In recent years, there has been an increase in the use of wooden panels such as CLT (Cross Laminated Timber) and LVL (Laminated Veneer Lumber) fitted into steel-framed (S-frame) or reinforced concrete (RC) frames as wooden earthquake-resistant walls.

One example is disclosed in Patent Document 1, which describes how the flanges of steel-framed beams and CLT earthquake-resistant walls are connected with bolts and nuts to join the beams and earthquake-resistant walls.

This type of wall structure is attracting attention because it reduces noise and vibration during construction, shortens construction times, and is low cost, while also achieving strength equivalent to that of concrete or steel, which contributes to combating global warming.

JP 2019-65685 A

When attempting to use wooden boards such as CLT or LVL for earthquake-resistant walls, there is a limit to the thickness that can be processed in factories, so it may not be possible to manufacture wooden boards of a thickness that meets the required performance.

Even if it were possible to manufacture wooden boards of a thickness that meets the required performance, if the area of the wooden boards increases due to factors such as high floor height, and each wooden board becomes excessively heavy, it will be difficult to transport by hand or to fine-tune on-site, reducing workability.

Furthermore, in the general construction method of wooden earthquake-resistant walls, where the frame and wooden earthquake-resistant wall are joined using bolts and nuts, it is necessary to leave a large gap at the joint between the frame and the wooden earthquake-resistant wall, taking into account the payment of the wooden earthquake-resistant wall. This gap prevents stress transmission and must be filled with a hardening material such as mortar, and the larger the gap, the more time and cost required for the filling work, and the less attractive it looks.

The present invention was made in consideration of the above-mentioned problems, and its purpose is to provide a wall structure and a construction method for a wall structure that are easy to construct.

The first invention for achieving the above-mentioned object is a wall structure in which a frame having columns and beams is joined to a wall body surrounded by the frame, the wall body and the frame are joined using a metal joint having a perforated steel plate and fixed to the frame, the wall body is formed by arranging two wooden boards so that their board surfaces face each other, a solidifying material is filled between the frame and the wall body, the frame and the wall body are joined via the perforated steel plate protruding from the frame into the space between the two wooden boards, the perforated steel plate is sandwiched between the two wooden boards, a gap is provided between the two wooden boards at a position different from the perforated steel plate, and the entire part of the metal joint between the frame and the wall body is covered with the solidifying material when viewed along the out-of-plane direction of the frame.

In the present invention, a wooden earthquake-resistant wall is formed by arranging two wooden boards with their board surfaces facing each other, so the thickness of the wooden board can be made thinner than when a wooden earthquake-resistant wall is formed from a single wooden board, so it is less subject to restrictions on processing thickness at the factory, is lightweight, and is easy to install.

Moreover, in this invention, perforated steel plates protruding from the frame are used to join the frame and the wooden earthquake-resistant wall, and two wooden boards are moved from the outside of the frame's plane and positioned so that they sandwich the perforated steel plate. This eliminates the need to leave a large gap where the frame and the wooden earthquake-resistant wall meet for the purpose of sweeping, making it easier to fill the gap, improving workability, and improving the appearance.

The metal joint has a base plate that is installed on the wall side surface of the frame, and the perforated steel plate that is fixed to the wall side surface of the base plate, and it is desirable that the base plate is positioned so that the wall side surface of the base plate is flush with the wall side surface of the frame.

It is also desirable that the frame be of reinforced concrete or steel-reinforced concrete construction, and that the metal joint have a base plate installed on the surface of the frame facing the wall, the perforated steel plate fixed to the surface of the base plate facing the wall, and legs fixed to the surface of the base plate facing the frame, with the ends opposite the base plate embedded in the concrete of the frame.

The second invention is a wall structure in which a frame having pillars and beams is joined to a wall surrounded by the frame, the wall being formed by arranging two wooden boards so that their board surfaces face each other, a solidifying material is filled between the frame and the wall, the frame and the wall are joined via a perforated steel plate protruding from the frame into the space between the two wooden boards, the upper and lower ends of the wall are joined to the upper and lower beams of the frame via the perforated steel plate, and the left and right ends of the wall are joined to the left and right pillars of the frame via the perforated steel plate.

The third invention is a construction method for a wall structure according to the first or second invention, in which a frame having columns and beams is joined to a wall body surrounded by the frame, and includes the steps of forming the wall body by arranging two wooden boards so that their board surfaces face each other, and filling the space between the frame and the wall body with a solidifying material, and is characterized in that the frame and the wall body are joined via a perforated steel plate protruding from the frame into the space between the two wooden boards.

The present invention provides a wall structure and a method for constructing a wall structure that are easy to construct.

FIG. FIG. 1A to 1C are diagrams illustrating a construction method for the wall structure 1. FIG. A diagram showing a joint structure 4b. A diagram showing a joint structure 4c. FIG. 2 shows wall structures 1a and 1a'. A diagram showing joint structures 5, 5'. A diagram showing a joint structure 5a. A diagram showing a joint structure 5b.

The following describes in detail a preferred embodiment of the present invention with reference to the drawings.

[First embodiment]
(1. Wall Structure 1)
Fig. 1 is a diagram showing a wall structure 1 according to a first embodiment of the present invention. As shown in Fig. 1, the wall structure 1 is formed by joining a frame 2, which is a frame-like framework having columns 21 and beams 22, to a wooden earthquake-resistant wall 3 surrounded by the frame 2, by a joint structure 4.

The columns 21 and beams 22 are made of reinforced concrete or steel reinforced concrete (SRC), and the wooden earthquake-resistant wall 3 is formed by stacking two wooden boards in the out-of-plane direction. The wooden boards can be wood-based boards such as CLT or LVL. CLT and LVL are well known, so a description of them will be omitted.

The out-of-plane direction is the direction perpendicular to the plane surrounded by the frame 2, and corresponds to the normal direction to the paper surface of FIG. 1. In contrast, the direction parallel to the above plane is called the in-plane direction.

(2. Joint Structure 4)
Fig. 2 is a diagram showing an overview of the joint structure 4. Fig. 2(a) is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 2(b) is a perspective view of the joint metal 41. Note that Fig. 2 shows the joint structure 4 that joins the column 21 of the frame 2 to the wooden earthquake-resistant wall 3, but the beam 22 and the wooden earthquake-resistant wall 3 are also joined by the same joint structure 4.

In the joint structure 4 in FIG. 2, the pillar 21 and the wooden earthquake-resistant wall 3 are joined using a joint metal 41 and a drift pin 42, and a solidifying material 43 such as mortar is filled into the gap between the pillar 21 and the wooden earthquake-resistant wall 3.

The metal joint 41 includes a perforated steel plate 411, a base plate 413, and legs 414.

The perforated steel plate 411 has holes 412. The perforated steel plate 411 is fixed to the surface of the base plate 413 facing the wooden earthquake-resistant wall 3, and is positioned so that the plate surface (meaning the widest surface; the same applies below) is in the in-plane direction.

The base plate 413 is a steel plate that is installed on the surface of the pillar 21 facing the wooden earthquake-resistant wall 3. The legs 414 are fixed to the surface of the base plate 413 facing the pillar 21 and embedded in the concrete of the pillar 21. Various types of steel materials such as anchor bolts can be used for the legs 414.

The wooden earthquake-resistant wall 3 is a wall formed by arranging two wooden boards 31 so that their board surfaces face each other. As mentioned above, CLT, LVL, etc. can be used for the wooden boards 31.

Each wooden board 31 has a through hole 32. The through hole 32 penetrates the wooden board 31 in the out-of-plane direction (corresponding to the up-down direction in FIG. 2(a)).

The perforated steel plate 411 protrudes from the pillar 21 and is sandwiched in the space between the two wooden boards 31. Each wooden board 31 is positioned so that the position of the through hole 32 matches the position of the hole 412 in the perforated steel plate 411, and the through holes 32 in the two wooden boards 31 communicate with the holes 412 in the perforated steel plate 411 in the out-of-plane direction.

An out-of-plane drift pin 42 is inserted into each through hole 32 and hole 412, thereby integrating the two wooden boards 31 and the perforated steel plate 411 and joining the column 21 and the wooden earthquake-resistant wall 3. The drift pin 42 is a metal rod, and the diameter of each through hole 32 and hole 412 is approximately the same as the diameter of the drift pin 42.

The number and arrangement of the holes 412 in the perforated steel plate 411 and the dimensions of each part of the metal joint 41 are designed according to the stress generated in the wooden earthquake-resistant wall 3. For example, in FIG. 2(b), a total of four holes 412 are arranged in two vertical rows and two horizontal columns, but the number and arrangement of the holes 412 (i.e., the number and arrangement of the drift pins 42) are not particularly limited.

As shown in FIG. 1, multiple joint structures 4 are formed at a predetermined interval in the axial direction of the columns 21 and beams 22, but the number and intervals are also designed according to the above stress and are not particularly limited. It is also possible to form the joint structures 4 only on the columns 21 or beams 22. In addition, the solidification material 43 is filled over the entire height of the columns 21 and the entire length of the beams 22 to transmit stress between the frame 2 and the wooden earthquake-resistant wall 3. This is also the case in the embodiments described below.

When constructing the wall structure 1, as shown in Figure 3(a), the metal joints 41 are fixed to the columns 21 and beams 22 in predetermined positions when the frame 2 is constructed. The wooden earthquake-resistant wall 3 is then formed in a position surrounded by the frame 2. At this time, the two wooden boards 31 are moved from the out-of-plane direction as shown by the arrow a in Figure 3(b), and the perforated steel plate 411 is positioned so that it is sandwiched between the two wooden boards 31.

After this, as shown in FIG. 3(c), the drift pins 42 are inserted through the through holes 32 in the two wooden boards 31 and the holes 412 in the perforated steel plate 411, and the gap between the frame 2 and the wooden earthquake-resistant wall 3 is filled with a solidifying material 43 such as mortar. The solidifying material 43 can be pressed into the gap between the frame 2 and the wooden earthquake-resistant wall 3 after backing plates (not shown) are placed on both sides of the wooden earthquake-resistant wall 3 in the out-of-plane direction.

In this way, in the first embodiment, the wooden earthquake-resistant wall 3 is formed by arranging two wooden boards 31 so that their board surfaces face each other. This allows the thickness of the wooden board 31 to be thinner than when the wooden earthquake-resistant wall 3 is formed from a single wooden board, making it less subject to restrictions on processing thickness in the factory, lightweight, and easy to install.

In addition, in this embodiment, the perforated steel plate 411 protruding from the frame 2 is used to join the frame 2 and the wooden board 31, and two wooden boards 31 can be moved from the outside of the frame 2's plane and positioned so that they sandwich the perforated steel plate 411. This eliminates the need to leave a large gap at the joint between the frame 2 and the wooden earthquake-resistant wall 3 for the board to be sunk, making it easier to fill the gap, improving workability, and improving appearance.

In the first embodiment, the columns 21 and beams 22 are made of reinforced concrete or reinforced concrete, but the structure of the columns 21 and beams 22 is not particularly limited, and they may be made of steel, concrete-filled steel tubes (CFT), wood, or other materials. When the columns 21 and beams 22 are made of steel or CFT, the perforated steel plate 411 can be fixed to the columns 21 and beams 22 by factory welding or on-site welding.

Other examples of the present invention will be described below as the second to seventh embodiments. Each embodiment will be described in terms of the differences from the previously described embodiments, and similar configurations will be given the same reference numerals in the figures and the like, and their description will be omitted. In addition, the configurations described in each embodiment, including the first embodiment, can be combined as necessary.

Second Embodiment
The second embodiment is an example in which a wooden earthquake-resistant wall and a frame 2 are joined using a joint structure different from the joint structure 4 of the first embodiment.

Figure 4 is a diagram showing an overview of a joint structure 4a according to the second embodiment. Figure 4(a) shows a cross section of the joint structure 4a similar to that of Figure 2(a), and Figures 4(b) and 4(c) are perspective views of perforated steel plates 41a and 44 used in the joint structure 4a, respectively.

In the joint structure 4a, the pillar 21 and the wooden earthquake-resistant wall 3a are joined using perforated steel plates 41a and 44, drift pins 42, and bolts 45.

The perforated steel plate 41a is embedded in the pillar 21, and a portion having a hole 412a protrudes from the pillar 21. The perforated steel plate 41a is arranged in the in-plane direction.

The perforated steel plate 44 (another perforated steel plate) is arranged in the in-plane direction so as to be sandwiched between the two wooden boards 31a that make up the wooden earthquake-resistant wall 3a. The perforated steel plate 44 has holes 441 and 442.

The holes 441 in the perforated steel plate 44 are holes for inserting the drift pins 42 as in the first embodiment, and communicate with the through holes 32 in each wooden board 31a. By inserting the drift pins 42 into these through holes 32 and holes 441, the two wooden boards 31a and the perforated steel plate 44 are integrated.

An L-shaped notch 33 is formed in the end of each wooden board 31a facing the pillar 21, and when two wooden boards 31a are arranged with their board surfaces facing each other to form a wooden earthquake-resistant wall 3a, the notches 33 in both wooden boards 31a form recesses in the ends of the wooden earthquake-resistant wall 3a facing the pillar 21.

A portion of the perforated steel plate 41a having the holes 412a protrudes into this recess (the space between the two wooden boards 31a), and a portion of the perforated steel plate 44 having the holes 442 also protrudes into the recess from between the wooden boards 31a.

The perforated steel plates 41a, 44 are positioned so that the holes 412a, 442 are aligned and overlap in the out-of-plane direction (corresponding to the up-down direction in FIG. 4(a)). A bolt 45 is inserted in the out-of-plane direction through these holes 412a, 442. The diameter of the holes 412a, 412 is sufficiently larger than the bolt 45, making it easy to insert the bolt 45.

A through hole 34 for inserting a bolt 45 is also provided in the out-of-plane direction at the end of one of the wooden boards 31a that constitute the wooden earthquake-resistant wall 3a, which is on the side of the pillar 21. The diameter of the through hole 34 is larger than that of the bolt 45, and the tip of the bolt 45 that passes through the through hole 34 of the wooden board 31a is inserted into the holes 412a, 442 of the perforated steel plates 41a, 44 in the recesses.

The gap between the pillar 21 and the wooden earthquake-resistant wall 3a, including the recessed portion, is filled with a solidifying material 43 such as mortar. The solidifying material 43 is also filled into the holes 412a and 442 of the perforated steel plates 41a and 44, which allows the transmission of shear force between the perforated steel plates 41a and 44 via the solidifying material 43, and the pillar 21 and the wooden earthquake-resistant wall 3a are integrated.

In addition, the bolts 45 are inserted through the holes 412a, 442 in the perforated steel plates 41a, 44, increasing the shear resistance, allowing for the transmission of greater shear forces and improving the integrity of the pillars 21 and the wooden earthquake-resistant wall 3a.

In the example of Figures 4(b) and (c), each perforated steel plate 41a, 44 has two holes 412a, 442 arranged vertically, but the number and arrangement of holes 412a, 442 in each perforated steel plate 41a, 44 is designed according to the stress generated in the wooden earthquake-resistant wall 3 and is not particularly limited. The same applies to the holes 441 in the perforated steel plate 44.

In the example of FIG. 4(a), one perforated steel plate 41a is installed in the in-plane direction, but it is also possible to install multiple perforated steel plates 41a in the in-plane direction at intervals in the out-of-plane direction. Furthermore, other rod materials, such as drift pins or reinforcing bars, can be used instead of the bolts 45, and the bolts 45 can be omitted.

In this second embodiment, as in the first embodiment, a wall structure with excellent workability can be provided. In the second embodiment, the perforated steel plates 41a, 44 function as perforated steel plate dowels that transmit shear forces, and the frame 2 and the wooden earthquake-resistant wall 3 can be integrated with a simple structure by transmitting the shear forces between the perforated steel plates 41a, 44 via the solidifying material 43. In addition, the holes 412a, 442 in the perforated steel plates 41a, 44 can be designed to be appropriately large, so that misalignment between the perforated steel plates 41a, 44 can be easily absorbed.

On the other hand, in the first embodiment, the frame 2 and the wooden earthquake-resistant wall 3 are joined by inserting the drift pin 42 through the through holes 32 of the two wooden boards 31 and the holes 412 of the perforated steel plate 411, so there is no need to perform special processing such as notching 33 on the end surface (the surface facing the frame 2) of the wooden earthquake-resistant wall 3, which has the advantage of allowing for a simple yet aesthetically pleasing fit.

[Third embodiment]
The third embodiment is an example in which a wooden earthquake-resistant wall and a frame 2 are joined using a joint structure different from the joint structures 4, 4a of the first and second embodiments.

Figure 5 is a diagram showing an overview of joint structure 4b according to the third embodiment. Figure 5(a) shows a cross section of joint structure 4b similar to that of Figure 2(a), and Figure 5(b) shows a cross section taken along line B-B in Figure 5(a). Figure 5(c) is a perspective view showing joint metal fittings 41b, 46, and bolt 47 used in joint structure 4b.

In the joint structure 4b, the column 21 and the wooden earthquake-resistant wall 3b are joined using joint metal fittings 41b, 46, drift pins 42, and bolts 47.

The joint metal 41b has a perforated steel plate 411b, a base plate 413, legs 414, etc. The base plate 413 and legs 414 are the same as in the first embodiment, but the perforated steel plate 411b is fixed to the surface of the base plate 413 facing the wooden earthquake-resistant wall 3b, unlike in the first embodiment, so that the plate surface is horizontal along the out-of-plane direction. The perforated steel plate 411b also has holes 415.

The metal joint 46 is a cross-shaped combination of perforated steel plates 461 and 462. That is, the perforated steel plate 461 is arranged so that its plate surface is in the in-plane direction, and the perforated steel plate 462 is arranged so that its plate surface is horizontal along the out-of-plane direction and perpendicular to the perforated steel plate 461 in the cross shape.

The perforated steel plate 461 has a hole 463. A portion of the perforated steel plate 462 protrudes from the perforated steel plate 461 toward the column 21, and a hole 464 is provided in the portion.

As shown in FIG. 5(b), the metal joint 46 is sandwiched between two wooden boards 31b that make up the wooden earthquake-resistant wall 3b. Each wooden board 31b has a groove 35 for inserting a perforated steel plate 462.

The holes 463 in the perforated steel plate 461 are holes for inserting the drift pins 42 as in the first embodiment, and communicate with the through holes 32 in each wooden board 31b. By inserting the drift pins 42 through these through holes 32 and holes 463, the two wooden boards 31b and the connecting metal fittings 46 are integrated.

As in the second embodiment, an L-shaped notch 33 is formed in the end of each wooden board 31b facing the pillar 21, and when two wooden boards 31b are arranged with their board surfaces facing each other to form a wooden earthquake-resistant wall 3b, the notches 33 in both wooden boards 31b form recesses in the ends of the wooden earthquake-resistant wall 3b facing the pillar 21.

The perforated steel plate 411b protrudes into this recess (the space between the two wooden boards 31b), and a portion of the perforated steel plate 462 with holes 464 also protrudes into the recess from between the wooden boards 31b.

The perforated steel plates 411b, 462 are positioned so that the holes 415, 464 are aligned and overlap in the axial direction of the column 21 (corresponding to the normal direction to the paper surface of FIG. 5(a)). A bolt 47 in the axial direction of the column 21 is inserted through these holes 415, 464. The diameter of the holes 415, 464 is sufficiently larger than the bolt 47, making it easy to insert the bolt 47.

The gap between the pillar 21 and the wooden earthquake-resistant wall 3b, including the recessed portion, is filled with a solidifying material 43 such as mortar. The solidifying material 43 is also filled into the holes 415 and 464 of the perforated steel plates 411b and 462, which allows the transmission of shear force between the perforated steel plates 411b and 462 via the solidifying material 43, and the pillar 21 and the wooden earthquake-resistant wall 3b are integrated.

In addition, the bolts 47 are inserted through the holes 415 and 464 in the perforated steel plates 411b and 462, increasing the shear resistance, allowing for the transmission of greater shear forces and improving the integrity of the pillars 21 and the wooden earthquake-resistant wall 3b.

In addition, in the joint metal 41b, 46, multiple perforated steel plates 411b, 462 (two in the example of Figs. 5(a)-(c)) are arranged in the axial direction of the column 21, and one hole 415, 464 is provided per perforated steel plate 411b, 462, but the number of perforated steel plates 411b, 462, the dimensions of each part of the joint metal 41b, 46, the number of holes 415, 464 per perforated steel plate 411b, 462, the arrangement of the holes 415, 464, etc. are designed according to the stress generated in the wooden earthquake-resistant wall 3b and are not particularly limited. The same applies to the holes 463 of the perforated steel plate 461. In addition, other rod materials, such as reinforcing bars, can be used instead of the bolts 47, and the bolts 47 can be omitted.

In this third embodiment, as in the first embodiment, a wall structure with excellent workability can be provided. In addition, in the third embodiment, when the perforated steel plates 411b, 462 attempt to move in an out-of-plane direction, the solidification material 43 with a thickness of the entire height of the column 21 (or the entire length of the beam 22) resists and suppresses the stress that tends to crack in the out-of-plane direction, so a strong restraining effect can be obtained and the strength of the joint structure 4b can be expected to be improved.

[Fourth embodiment]
The fourth embodiment is an example in which a wooden earthquake-resistant wall and a frame 2 are joined using a joint structure different from the joint structures 4, 4a, and 4b of the first to third embodiments. Fig. 6 is a diagram showing an outline of a joint structure 4c according to the fourth embodiment. Fig. 6(a) shows a cross section of the joint structure 4c similar to Fig. 2(a). Fig. 6(b) is a perspective view of a joint metal 41c used in the joint structure 4c, and Fig. 6(c) is a perspective cross-sectional view showing a notch 33 in a wooden board 31c.

In the joint structure 4c, the column 21 and the wooden earthquake-resistant wall 3c are joined using a joint metal fitting 41c.

The joint metal 41c has a perforated steel plate 411c, a base plate 413, legs 414, etc. The base plate 413 and legs 414 are the same as those in the first embodiment. The perforated steel plate 411c is fixed to the surface of the base plate 413 facing the wooden earthquake-resistant wall 3c so that the plate surface is in the in-plane direction, and holes 416 are provided for filling the solidification material 43.

The wooden earthquake-resistant wall 3c is constructed by arranging two wooden boards 31c so that their board surfaces face each other, and like the second embodiment, each wooden board 31c has a recess formed by an L-shaped notch 33 at the end on the pillar 21 side. A number of depressions 331 are provided on the surfaces along the in-plane direction of these notches 33, as shown in FIG. 5(c).

The aforementioned perforated steel plate 411c protrudes into this recess (the space between the two wooden boards 31c), and the gap between the pillar 21 and the wooden earthquake-resistant wall 3c, including this recess, is filled with a solidifying material 43 such as mortar. The recess 331 improves the integrity of the solidifying material 43 and the wooden earthquake-resistant wall 3c, and filling the holes 416 of the perforated steel plate 411c with the solidifying material 43 makes it possible to transmit shear force between the perforated steel plate 411c and the wooden earthquake-resistant wall 3c via the solidifying material 43, and the pillar 21 and the wooden earthquake-resistant wall 3c are integrated.

In the example of Figures 6(b) and (c), one perforated steel plate 411c is provided in the joint metal 41c, and the perforated steel plate 411c has a total of 10 holes 416 arranged in two horizontal columns and five vertical columns, but the number of perforated steel plates 411c, the dimensions of each part of the joint metal 41c, and the number and arrangement of the holes 416 in the perforated steel plate 411c are designed according to the stress generated in the wooden earthquake-resistant wall 3c and are not particularly limited. The same applies to the depressions 331 in the wooden board material 31c.

In this embodiment, two wooden boards 31c are fastened together using bolts 61 (rods) and nuts 62, and are arranged so that their board surfaces are in contact with each other. The bolts 61 are headed bolts, and each wooden board 31c is provided with a through hole 36 for passing the shaft of the bolt 61. The through hole 36 penetrates each wooden board 31c in the out-of-plane direction, and expands in diameter on the outer surface of each wooden board 31c to form a recess 361. The shaft of the bolt 61 is inserted into the through hole 36 of one wooden board 31c, and a nut 62 is fastened to the tip of the shaft protruding from the other wooden board 31c, thereby fastening the two wooden boards 31c. The head of the bolt 61 or the nut 62 is accommodated in the recess 361.

It is also possible to omit the bolts 61 and nuts 62 and use other means to hold the wooden boards 31c to form the wooden earthquake-resistant wall 3c. For example, angle pieces or other retaining fixtures can be attached to the frame 2 on both sides of the wooden earthquake-resistant wall 3c in the out-of-plane direction, thereby holding the two wooden boards 31c so that they do not separate in the out-of-plane direction to form the wooden earthquake-resistant wall 3c.

In this fourth embodiment, as in the first embodiment, a wall structure with excellent workability can be provided. In addition, in the fourth embodiment, the perforated steel plate 411c functions as a perforated steel plate dowel, allowing the frame 2 and the wooden earthquake-resistant wall 3c to be joined with a simple structure, and there is no need to insert a rod such as a drift pin into the perforated steel plate 411c as in the first embodiment to integrate the two wooden boards 31c and the perforated steel plate 411c, making construction easy.

[Fifth embodiment]
7(a) is a diagram showing a wall structure 1a according to a fifth embodiment of the present invention. In the wall structure 1a, a plurality of wooden shear walls 3 are arranged so as to be surrounded by a frame 2. These plurality of wooden shear walls 3 are arranged side by side in the horizontal direction within the plane of the frame 2, and adjacent wooden shear walls 3 are joined by a joint structure 5. Each wooden shear wall 3 and the frame 2 are joined by the joint structure 4 of the first embodiment, but they may also be joined by the joint structures 4a to 4c of the second to fourth embodiments.

Figures 8(a) and (b) are diagrams showing an overview of joint structure 5. Figure 8(a) is a cross-sectional view taken along line C-C in Figure 7(a), and Figure 8(b) is a perspective view of a stud 51 used in joint structure 5.

In the joint structure 5, two adjacent wooden earthquake-resistant walls 3 are joined using studs 51. The studs 51 are steel pipes with a rectangular cross section, and holes 511 are provided on the in-plane surface. The studs 51 are approximately the same height as the wooden earthquake-resistant walls 3, and the upper and lower ends that contact the upper and lower beams 22 are blocked by plates 512 to ensure smoke and fire resistance.

The ends of the two wooden boards 31 that make up the wooden earthquake-resistant wall 3 that face the stud 51 have an L-shaped notch 37. When the two wooden boards 31 are arranged with their board surfaces facing each other to form the wooden earthquake-resistant wall 3, the notches 37 of both wooden boards 31 form recesses in the ends of the wooden earthquake-resistant wall 3 that face the stud 51.

In this embodiment, the recesses in the adjacent wooden earthquake-resistant walls 3 form a space between the wooden earthquake-resistant walls 3 for placing the partition 51, and the out-of-plane surface 371 (corresponding to the up-down direction in FIG. 8(a)) of the notch 37 of each wooden board 31 comes into surface contact with the out-of-plane surface of the partition 51. Note that the adjacent wooden earthquake-resistant walls 3 are placed with a small gap between the opposing tips.

The holes 511 in the studs 51 are for inserting the drift pins 52. The ends of the two wooden boards 31 that make up each wooden earthquake-resistant wall 3 on the side of the studs 51 are also provided with through holes 38 in the out-of-plane direction for inserting the drift pins 52. The positions of the through holes 38 in the wooden boards 31 and the holes 511 in the studs 51 correspond to each other, and the drift pins 52 are inserted through the through holes 38 in the two wooden boards 31 and the holes 511 in the studs 51 and are arranged so as to penetrate the two wooden boards 31 and the studs 51, so that the two wooden boards 31 that make up the wooden earthquake-resistant wall 3 and the studs 51 are integrated, and adjacent wooden earthquake-resistant walls 3 are integrated via the studs 51.

In wall structure 1a, adjacent wooden shear walls 3 are required to behave as if they were a single wooden shear wall. However, if perforated steel plates 51' were used instead of studs 51 as in joint structure 5' in Figure 8(c), rattling would occur at the joints between the wooden shear walls 3 and the perforated steel plates 51' when a shear force is applied to the wooden shear walls 3. This is because a gap of about 1 to 2 mm occurs between the holes 511 in the perforated steel plates 51' and the drift pins 52 for construction reasons.

In contrast, in this embodiment, as described above, the wooden earthquake-resistant wall 3 and the studs 51 are in surface contact with each other, so when a shear force is applied to the wall structure 1a, the support pressure (surface pressure) of the contact surface shown by the symbol p in Figure 8(a) can minimize wobbling of the joint at the beginning of shear deformation, and initial rigidity and strength can be secured at the same time when a shear force is applied.

In the case of Figure 8(c) where a perforated steel plate 51' is used to join a wooden earthquake-resistant wall 3, the drift pin 52 has three yield hinges (see symbol b in Figure 8(c)) when shear force is generated. However, in this embodiment, as shown in Figure 8(a), the drift pin 52 penetrates a pair of spaced apart surfaces of the stud 51, so that the yield hinges are formed in four dispersed locations (see symbol b in Figure 8(a)), and the strength of each drift pin can be expected to improve.

The thickness (length in the out-of-plane direction) of the steel pipes used for the studs 51 can be, for example, 1/3 to 1/4 of the thickness of the wooden earthquake-resistant wall 3, and the thickness of the steel pipes can be about 9 to 12 mm, but the dimensions, thickness, cross-sectional shape, and number and arrangement of the holes 511 of the steel pipes are designed according to the stress generated in the wooden earthquake-resistant wall 3 and are not particularly limited. As shown in the wall structure 1a' in Figure 7(b) , three or more wooden earthquake-resistant walls 3 may be arranged horizontally within the plane of the frame 2, and in this case, the wooden earthquake-resistant walls 3 other than those at both ends are connected to the wooden earthquake-resistant walls 3 by joint structures 5 on both horizontal sides.

Sixth embodiment
The sixth embodiment is an example in which wooden earthquake-resistant walls are joined together using a joint structure different from the joint structure 5 of the fifth embodiment. Fig. 9 is a diagram showing an outline of a joint structure 5a according to the sixth embodiment. Fig. 9(a) shows a cross section of the joint structure 5a similar to Fig. 8(a), and Fig. 9(b) shows a cross section taken along line D-D in Fig. 9(a). Note that in this embodiment, each wooden earthquake-resistant wall 3 and frame 2 are joined together using the joint structure 4 of the first embodiment.

In the joint structure 5a, two adjacent wooden earthquake-resistant walls 3 are joined using wooden studs 53.

The studs 53 have a crankshaft shape. That is, the studs 53 have multiple protrusions 531 formed in the vertical direction, and each protrusion 531 protrudes alternately toward each wooden earthquake-resistant wall 3.

The out-of-plane surface 371 of the notch 37 in the wooden board 31 (corresponding to the up-down direction in FIG. 9(a)) is formed unevenly along the vertical direction in accordance with the shape of the stud 53 described above, as shown in FIG. 9(b), and is in surface contact with the out-of-plane surface of the stud 53.

The number and dimensions of the protruding parts 531 of the studs 53 are designed according to the stress generated in the wooden earthquake-resistant walls 3, and are not particularly limited. The studs 53 are not limited to being made of wood, and may be made of steel pipes or the like. However, wood is easier to process, and the shape can be easily adjusted on-site by cutting with a plane when placing them in the spaces between the wooden earthquake-resistant walls 3.

In this embodiment, as in the fifth embodiment, the wooden earthquake-resistant wall 3 and the stud 53 are in surface contact, so that the support pressure (surface pressure) of the contact surface shown by the symbol p in FIG. 9(a) can minimize wobbling of the joint at the beginning of shear deformation. In addition, in this embodiment, the unevenness of the stud 53 transmits shear force between the wooden earthquake-resistant wall 3 and the stud 53, and the wooden earthquake-resistant walls 3 on both sides of the stud 53 can be integrated, so that the joining of the wooden earthquake-resistant wall 3 and the stud 53 using the drift pin 52 as in the fifth embodiment can be omitted. However, as in the fifth embodiment, it is possible to form holes in the stud 53 and the wooden board 31 in advance and join them using the drift pin 52.

[Seventh embodiment]
The seventh embodiment is an example in which wooden earthquake-resistant walls are joined together using a joint structure different from the joint structures 5 and 5a of the fifth and sixth embodiments. Fig. 10(a) is a diagram showing an outline of a joint structure 5b according to the seventh embodiment, and shows a cross section of the joint structure 5b similar to that of Fig. 8(a). In this embodiment, each wooden earthquake-resistant wall 3c and the frame 2 are joined together by, for example, the joint structure 4c of the fourth embodiment.

In the joint structure 5b, two adjacent wooden earthquake-resistant walls 3c are joined using adhesive 54.

As explained in the fourth embodiment, the wooden earthquake-resistant wall 3c is constructed by bringing the board surfaces of two wooden boards 31c into contact with each other and fastening these wooden boards 31c with bolts 61 and nuts 62. As mentioned above, it is also possible to omit the bolts 61 and nuts 62 and attach angle pieces or the like to the frame 2 later to hold the wooden boards 31c so that they do not separate in the out-of-plane direction.

In this embodiment, an L-shaped notch 39 is provided in one of the adjacent wooden earthquake-resistant walls 3c at the end of the wooden board 31c facing the other wooden earthquake-resistant wall 3c. When two wooden boards 31c are arranged with their board surfaces facing each other to form the wooden earthquake-resistant wall 3c, the notches 39 in both wooden boards 31c form a recess in the end of the one wooden earthquake-resistant wall 3c facing the other wooden earthquake-resistant wall 3c.

A convex portion corresponding to the concave portion is formed on the end of the other wooden earthquake-resistant wall 3c facing the one wooden earthquake-resistant wall 3c. In the other wooden earthquake-resistant wall 3c, a protrusion 40 is provided on the end of the wooden board 31c facing the one wooden earthquake-resistant wall 3c, and the convex portion is formed by overlapping the protrusions 40 of both wooden boards 31c when the two wooden boards 31c are arranged with their board surfaces facing each other to form the wooden earthquake-resistant wall 3c.

In the joint structure 5b, the convex portion of one wooden earthquake-resistant wall 3c is inserted into the concave portion of the other wooden earthquake-resistant wall 3c. The in-plane surfaces of the concave portion and the convex portion are then bonded together with adhesive 54. The dimensions of the concave portion and the convex portion are designed according to the stress generated in the wooden earthquake-resistant wall 3c and are not particularly limited.

According to the seventh embodiment, two adjacent wooden earthquake-resistant walls 3 can be joined using a simple mechanism with a small number of components. This makes it easy to install.

In this embodiment, each wooden earthquake-resistant wall 3c is formed by contacting the plate surfaces of two wooden boards 31c, but as shown in FIG. 10(b), the plate surfaces of the two wooden boards 31c may be spaced apart. In this case, by placing a plate-shaped filler 7 between the two wooden boards 31c, pressure can be reliably applied to the joints using the adhesive 54 by tightening the bolts 61 and nuts 62, and the joint structures 4 to 4b of the first to third embodiments can also be applied to the joints with the frame 2. The filler 7 is placed at least near the bolts 61 and at the joints.

The above describes preferred embodiments of the present invention with reference to the attached drawings, but the present invention is not limited to these examples. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally fall within the technical scope of the present invention.

1, 1a, 1a': Wall structure 2: Frame 3, 3a, 3b, 3c: Wooden earthquake-resistant wall 4, 4a, 4b, 4c, 5, 5', 5a, 5b: Joint structure 7: Filler 21: Pillar 22: Beam 31, 31a, 31b, 31c: Wooden board 32, 34, 36, 38: Through hole 412, 412a, 415, 416, 441, 442, 463, 4 64, 511: Hole 33, 37, 39: Notch 35: Groove 40: Projection 41, 41b, 41c, 46: Joint metal 41a, 44, 411, 411b, 411c, 461, 462: Perforated steel plate 42, 52: Drift pin 43: Solidification material 45, 47, 61: Bolt 51, 53: Stud 54: Adhesive 62: Nut 531: Projection

Claims (5)

A wall structure in which a frame having columns and beams is joined to a wall body surrounded by the frame,
The wall body and the frame are joined together using a metal joint having a perforated steel plate and fixed to the frame,
The wall body is formed by arranging two wooden boards so that their board surfaces face each other,
A solidification material is filled between the frame and the wall body,
The frame and the wall are joined via the perforated steel plate protruding from the frame into the space between the two wooden boards,
The perforated steel plate is sandwiched between the two wooden boards, and a gap is provided between the two wooden boards at a position different from the perforated steel plate;
A wall structure characterized in that, when viewed along the out-of-plane direction of the frame, the entire portion of the connecting metal between the frame and the wall body is covered by the solidifying material. The joining metal fittings are
A base plate is installed on a surface of the frame on the wall side;
The perforated steel plate is fixed to the wall side surface of the base plate;
having
2. The wall structure according to claim 1, wherein the base plate is disposed so that a surface of the base plate facing the wall is flush with a surface of the frame facing the wall. The frame is made of reinforced concrete or steel-reinforced concrete,
The joining metal fittings are
A base plate is installed on a surface of the frame on the wall side;
The perforated steel plate is fixed to the wall side surface of the base plate;
A leg portion is fixed to a surface of the base plate on the frame side, and an end portion opposite the base plate is embedded in the concrete of the frame;
2. The wall structure of claim 1, further comprising: A wall structure in which a frame having columns and beams is joined to a wall body surrounded by the frame,
The wall body is formed by arranging two wooden boards so that their board surfaces face each other,
A solidification material is filled between the frame and the wall body,
The frame and the wall are joined via a perforated steel plate protruding from the frame into the space between the two wooden boards,
The upper and lower ends of the wall body are joined to the upper and lower beams of the frame via the perforated steel plate, and
A wall structure characterized in that the left and right ends of the wall body are joined to the left and right columns of the frame via the perforated steel plates. A construction method for a wall structure according to any one of claims 1 to 4, in which a frame having columns and beams is joined to a wall body surrounded by the frame,
forming the wall body by arranging two wooden boards so that their board surfaces face each other;
A step of filling a space between the frame and the wall body with a solidification material;
having
A method for constructing a wall structure, characterized in that the frame and the wall body are joined via a perforated steel plate protruding from the frame into the space between the two wooden boards.

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