JP2023057702A - Seismic isolation and earthquake-resistant structure of combined wooden and light-framed building - Google Patents

Abstract

To provide seismic isolation and earthquake-resistant structures of combined wooden and lightweight steel-framed buildings that can ensure high seismic isolation and earthquake-resistant performance by firmly joining gusset plates and braces with two-face shear connections.SOLUTION: A seismic isolation and earthquake-resistant structure 10 of a combined wooden and light steel-framed building has gusset plates 30, 35 and 36 attached to respective diagonally opposite corners 20 between adjacent right and left columns 11 and 11, and adjacent upper and lower transverse members 21, 26 and 22 of the combined wooden and light steel-framed building, a pair of braces 40 and 40 bolted in a state of sandwiching the gusset plates 30, 35 and 36 attached to the respective corners 20 by end parts 40a and 40b, and the gusset plates 30, 35 and 36 are sandwiched by the end parts 40a and 40b of the pair of braces 40 and 40 and are subjected to two-face shear connections by a bolt 7.SELECTED DRAWING: Figure 2

Description

The present invention relates to a seismic isolation/earthquake-resistant structure for a combined wooden and lightweight steel building.

Patent Document 1 discloses an earthquake-resistant structure of this type of wooden building. The earthquake-resistant structure of this wooden building is formed by fixing connecting members, which are mounting brackets, at the four corners between a pair of horizontal members and a pair of pillars, and forming them at the corners of the connecting members located at each diagonal corner. Both ends of the brace (bracing) are fixed with bolts and nuts through the brace fixing holes. That is, by crossing the braces in an X-shape and fixing them at each corner, the seismic strength is ensured.

JP 2019-65590 A

However, in the conventional earthquake-resistant structure of wooden buildings, the corners of the connecting members are joined to the ends of the braces by bolts in one-sided shear joints. bolts to fasten the ends of the brace.

The present invention has been made in view of the problems of the prior art. It is an object of the present invention to provide a seismic isolation and earthquake-resistant structure for a combined wooden and lightweight steel frame building that can ensure high seismic isolation and seismic resistance performance by firmly joining gusset plates and braces with a double-shear joint. to do.

The seismic isolation/earthquake-resistant structure of the combined wooden and light steel frame building according to the aspect of the present invention is a diagonal line between the adjacent left and right columns and the adjacent upper and lower horizontal members of the combined wooden and light steel frame building. and a pair of braces that are bolted while sandwiching the gusset plate attached to each corner at both ends, the gusset plate , and is clamped by the pair of braces and joined by two-sided shearing with the bolts.

According to the present invention, the gusset plate is sandwiched between a pair of braces and joined by two-sided shear with a single bolt. It is possible to provide a seismic isolation and earthquake-resistant structure for a building that combines wooden and lightweight steel structures.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an example of a base isolation/earthquake-resistant structure (framework) of a combined wooden and lightweight steel structure building according to an embodiment of the present invention; FIG. 2 is an enlarged side view of part A of FIG. 1; (a) is a side view showing a pillar on the first floor of the combined wooden and lightweight steel building, and (b) is an enlarged cross-sectional view taken along line HH in FIG. (a). (a) is a side view showing a pillar on the second floor of the combined wooden and lightweight steel building, and (b) is an enlarged cross-sectional view taken along line II in FIG. (a). FIG. 3 is an enlarged side view of a portion B of FIG. 2; FIG. 6 is a cross-sectional view taken along line JJ in FIG. 5; 1(a) is a side view of a post mounting bracket used in the seismic isolation/quake-resistant structure, (b) is a rear view of the post mounting bracket, and (c) is a plan view of the post mounting bracket. FIG. (a) is a side view of a gusset plate as a brace mounting bracket used in the seismic isolation/quake-resistant structure, (b) is a rear view of the gusset plate, and (c) is a plan view of the gusset plate. (a) is an enlarged side view of the portion C in FIG. 2, (b) is a side view of the gusset plate located on the left side of FIG. 2(a), and (c) is located on the right side of FIG. 2(a). FIG. 4 is a side view of the gusset plate; FIG. 10 is a sectional view taken along line KK in FIG. 9; (a) is an enlarged side view of the portion D in FIG. 1, (b) is a side view of the gusset plate located on the left side in (a), and (c) is located on the right side in (a). FIG. 4 is a side view of the gusset plate; 3 is an enlarged side view of part E of FIG. 2; FIG. FIG. 13 is a cross-sectional view taken along line LL in FIG. 12; 13 is a cross-sectional view taken along line L'-L' in FIG. 12; FIG. FIG. 3 is an enlarged plan view of the intersection of the braces, which is the F portion of FIG. 2; FIG. 3 is an enlarged side view of the G portion of FIG. 2; FIG. 17 is a sectional view taken along line MM in FIG. 16;

Hereinafter, a detailed description will be given of a seismic isolation/seismic structure of a combined wooden and lightweight steel building according to an embodiment of the present invention with reference to the drawings.

FIG. 1 is a side view showing an example of a base isolation/earthquake-resistant structure (framework) of a combined wooden and lightweight steel building according to an embodiment of the present invention. FIG. 2 is an enlarged side view of part A of FIG. FIG. 3(a) is a side view showing a pillar on the first floor of a combined wooden and lightweight steel building. FIG. 3(b) is an enlarged sectional view taken along line HH in FIG. 3(a). FIG. 4(a) is a side view showing a pillar on the second floor of a combined wooden and lightweight steel building. FIG. 4(b) is an enlarged sectional view taken along the line II in FIG. 4(a). FIG. 5 is an enlarged side view of portion B of FIG. FIG. 6 is a cross-sectional view taken along line JJ in FIG. FIG. 7(a) is a side view of a post mounting bracket used for a seismic isolation/earthquake-resistant structure. FIG. 7(b) is a rear view of the support fitting. FIG. 7(c) is a plan view of the support fitting. FIG. 8(a) is a side view of a gusset plate as a brace mounting bracket used in a seismic isolation/quake-resistant structure. FIG. 8(b) is a rear view of the gusset plate. FIG. 8(c) is a plan view of the gusset plate. FIG. 9(a) is an enlarged side view of the portion C in FIG. FIG. 9(b) is a side view of the gusset plate located on the left side in FIG. 9(a). FIG. 9(c) is a side view of the gusset plate located on the right side in FIG. 9(a). FIG. 10 is a cross-sectional view taken along line KK in FIG. FIG. 11(a) is an enlarged side view of part D in FIG. FIG. 11(b) is a side view of the gusset plate located on the left side in FIG. 11(a). FIG. 11(c) is a side view of the gusset plate located on the right side in FIG. 11(a). 12 is an enlarged side view of the E portion of FIG. 2. FIG. 13 is a cross-sectional view taken along line LL in FIG. 12. FIG. 14 is a cross-sectional view taken along line L'-L' in FIG. 12. FIG. FIG. 15 is an enlarged plan view of the intersection of the braces, which is the portion F in FIG. 16 is an enlarged side view of the G portion of FIG. 2. FIG. FIG. 17 is a cross-sectional view taken along line MM in FIG.

As shown in FIG. 1, the base isolation/earthquake-resistant structure 10 of the combined wooden and lightweight steel building 1 includes adjacent left and right columns 11 (11') and adjacent upper and lower horizontal members 21, 26, and 22 (22). , 26, 24) and a pair of gusset plates 30, 35, 36 mounted at each diagonally opposed corner 20 between the gusset plates 30, 35, 36 and bolted to sandwich the gusset plates 30, 35, 36 at their ends. of braces 40, 40. Here, reference numeral 21 denotes a concrete or wooden foundation as a lower horizontal member, and reference numeral 22 denotes a horizontal frame placed between the upper end of the pillar 11 on the first floor and the lower end of the pillar 11' on the second floor. Girders (or beams) are shown as cross members. Further, reference numeral 24 denotes a girder (or beam) as a horizontal member arranged between the upper ends of the pillars 11' on the second floor, and reference numeral 26 denotes an intermediate position arranged at an intermediate position of each pillar 11, 11'. A horizontal beam is shown as a horizontal member.

As shown in FIGS. 1 and 2, a plurality of pillars 11 on the first floor are erected and supported by a concrete foundation 2 and base 21 at predetermined intervals. As shown in FIGS. 1, 2, and 5, anchor bolts 3 are embedded in the foundation 2 for fastening and fixing the lower ends of the pillars 11 on the first floor. A threaded portion 3 a of the anchor bolt 3 protrudes outward from the upper surface of the foundation 2 . Furthermore, the base 21 is provided in the shape of a rectangular frame so as to connect between the plurality of bases 2 .

As shown in FIGS. 1 to 4, 13, and 17, the column 11 on the first floor and the column 11' on the second floor are four C-channel (C-type) steel materials 12 bolted in a cross shape in plan view. , and prismatic timbers 13 respectively inserted into each C-channel steel member 12 . A plurality of bolt insertion holes 12b for bolting are drilled at respective upper, middle and lower positions of the pair of L-shaped bent portions 12a of each C-channel steel material 12. As shown in FIG. Four C-channel steel materials 12 having L-shaped pairs of adjacent bent portions 12a are provided with bolts 5 that are inserted into five bolt insertion holes 12b that are positioned at regular intervals from the upper side to the lower side. It is fastened and fixed in a cross shape in a plan view by tightening a nut 6 screwed to.

As shown in FIGS. 5 and 6, the lower ends (each end on the side of the foundation 2) of the four C-channel steel materials 12 of the columns 11 on the first floor protrude upward from the foundation 2 via the support fittings 15. It is fastened and fixed by tightening a nut 4 screwed onto the threaded portion 3a of the anchor bolt 3. As shown in FIG.

As shown in FIGS. 5 to 7(a), (b), and (c), the post mounting bracket 15 includes a trapezoidal right-angle side plate 15a having two upper and lower bolt insertion holes 16b, and a right-angle side plate 15a. and a triangular bottom plate 15c which is bent from the lower end and formed with a semicircular notch 15d for anchor bolt contact. Further, as shown in FIGS. 8(a), (b), and (c), a gusset plate 30 as a brace mounting bracket bolted to the lower end of the column 11 so as to match the triangular bottom plate 15c of the column mounting bracket 15 is provided. A substantially trapezoidal right-angle side plate 31 made of steel plate and having a total of three bolt insertion holes 32 drilled vertically and obliquely upward, and a semi-circular notch 34 for anchor bolts, which is bent from the lower end of the right-angled side plate 31. and a triangular bottom plate 33 on which is formed.

As shown in FIG. 5, when fixing the column 11 to the foundation 2, first, as shown in FIG. , 12a, the right-angled side plates 15a, 15a of the two support fittings 15 are sandwiched between them, and they are fastened and fixed together with bolts 5 and nuts 6. As shown in FIG. Next, the right angle side plates 15a, 15a of the two column mounting brackets 15 are sandwiched between the facing bent portions 12a of the two C-channel steel members 12 on the left side of the column 11 in FIG. Fasten and fix. At this time, the bolt insertion holes for the anchor bolts 3 are formed by aligning the semicircular cutouts 15d, 15d of the triangular bottom plates 15c of the two support brackets 15 with each other. Similarly, right-angled side plates 15a, 15a of two column mounting brackets 15 are sandwiched between the opposing bent portions 12a of the two C-channel steel members 12 on the upper side in FIG. Fasten and fix together. Further, the right-angled side plates 31, 31 of the two gusset plates 30 are sandwiched between the facing bent portions 12a of the two C-channel steel materials 12 on the upper side of FIG. fixed. At this time, the bolt insertion holes for the anchor bolts 3 are formed by aligning the semicircular cutouts 15d, 15d of the triangular bottom plates 15c of the two support brackets 15 with the semicircular cutouts 34, 34 of the triangular bottom plates 33 of the two gusset plates 30. to form 5 and 6, the triangular bottom plate 15c of each support fitting 15 and the triangular bottom plate 33 of each gusset plate 30 are sandwiched between a laying washer 16 and a reinforcing washer 17 and screwed to the screw portion 3a of each anchor bolt 3. The pillar 11 is fixed to the foundation 2 by tightening the nut 4 and fastening and fixing. Further, as shown in FIGS. 5 and 6, the right-angled side plates 31, 31 of the two superimposed gusset plates 30 are sandwiched between the lower ends 40b of the pair of braces 40, 40 to form a single brace. It is double-shear-joined with a bolt 7 and a nut 8 .

As shown in FIGS. 1 and 2, between the upper end of the column 11 on the first floor and the lower end of the column 11' on the second floor of the combined wooden and lightweight steel frame building 1, a girder (or beam) as a horizontal member is provided. 22 is attached. In addition, as shown in FIG. 1, girders (or beams) 24 as horizontal members are attached between the upper ends of the pillars 11' on the second floor of the combined wooden and lightweight steel building 1. As shown in FIG. Furthermore, as shown in Figs. 1 and 2, a horizontal beam (intermediate A horizontal member) 26 is attached. When the distance between adjacent left and right pillars 11 (11') is short, girders are generally used, and when the distance is long, beams are generally used. are described as digits.

As shown in FIGS. 2, 9(a) and 10, the middle girders 22 have two C-channel steel members 23 bolted back-to-back. That is, the two C-channel steel members 23, 23 are connected to each other by tightening bolts 5 inserted into bolt insertion holes 23a drilled on both end sides and nuts 6 screwed onto the bolts 5, thereby forming a gusset plate as a brace mounting bracket. 35 are interposed and fastened and fixed back to back. As shown in FIG. 9, the gusset plate 35 is formed in the shape of a flat steel plate and has a plurality of bolt insertion holes 35a. They are arranged in pairs on the left and right between the lower end sides. Then, the gusset plate 35 on one side is two C-channels between the two C-channel steel members 12, 12 located in front and behind one of the first floor column 11 and the second floor column 11' and between the middle girder 22. The steel members 23 and 23 are sandwiched between one ends of the steel members 23 , 23 and fastened and fixed via a plurality of sets of bolts 5 and nuts 6 .

Also, as shown in FIG. 9(a), the gusset plate 35 on the other side consists of two C-channel steel members 12, 12 and 12 located in front and behind the other side of the first floor column 11 and the second floor column 11'. 12 and between the other ends of the two C-channel steel members 23, 23 of the middle girder 22, respectively, and fastened and fixed via a plurality of sets of bolts 5 and nuts 6. As shown in FIG. The lower corner 35c of the gusset plate 35 on the other side is clamped between the upper ends 40a of a pair of braces 40, 40 and joined by a single bolt 7 and a nut 8 in a double-shear joint. 11(a), the lower corner 35c of the gusset plate 35 is sandwiched between the upper ends 40a of the pair of braces 40, 40. A bolt 7 and a nut 8 are used to form a double-shear joint, and the upper corner 35b of the gusset plate 35 is clamped between the lower ends 40b of a pair of braces 40, 40 to form a single bolt 7. and the nut 8 are double-shear-joined.

Further, as shown in FIG. 1, the upper tier 24 has two C-channel steel members 25 bolted back-to-back. In other words, these two C-channel steel materials 25, 25 are fastened by bolts 7 inserted into bolt insertion holes 25a drilled on both ends and nuts 8 screwed on the bolts 7, thereby tightening the gusset plate as a brace mounting bracket. 35 are interposed and fastened and fixed back to back. Like the gusset plate 35 arranged in the middle stage, this gusset plate 35 is formed in a plate-like shape made of steel plate and has a plurality of bolt insertion holes 35a. or located on one side. The gusset plate 35 is sandwiched between the two C-channel steel members 12, 12 positioned in front and behind the column 11' on the second floor and between the ends of the two C-channel steel members 23, 23 of the girder 24 on the upper level. are fastened and fixed through a plurality of sets of bolts 5 and nuts 6. A lower corner portion 35c of the gusset plate 35 is sandwiched between upper end portions 40a of a pair of braces 40, 40 and joined by a single bolt 7 and a nut 8 in a double-shear joint.

As shown in FIG. 14, rung 26 has two C-channel steel members 27, 27 bolted back-to-back. That is, the two C-channel steel materials 27, 27 are interposed with the gusset plate 36 by tightening the bolt 5 inserted into the bolt insertion hole 27a drilled at a predetermined distance and the nut 8 screwed to the bolt 5. are fastened and fixed back-to-back.

As shown in FIGS. 2, 12 to 14, 16, and 17, the gusset plates 36 as brace mounting brackets attached to the corners 20 on the upper and lower end sides of the horizontal beam 26 are made of steel and have one side. It is formed in the shape of a flat plate having a projection 36a protruding in a trapezoidal shape and having a notch 36d between upper and lower portions 36b and 36c. The projecting portion 36a and the upper and lower portions 36b and 36c of the gusset plate 36 are formed with bolt insertion holes 36e, respectively. The gusset plate 36 is arranged such that the notch (partial) 36d side is sandwiched between the two front and rear C-channel steel materials 12, 12 of the column 11, and the notch 36d contacts the steel receiving plate 9. bolted. The receiving plate 9 prevents the gusset plate 36 from rotating and moving downward. As a result, the G portion shown in FIG. 2 cannot transmit stress to the pillar 11, but can only transmit applied force to the brace 40, and the corresponding portion E can transmit stress in two directions, the pillar 11 and the brace 40. Become. That is, the gusset plates 36 attached to the corners 20 on the upper and lower end sides of the horizontal beam 26 are plates for axial force conversion.

12 and 16, the upper portion 36b of the gusset plate 36 is sandwiched between the lower ends 40b of a pair of braces 40, 40 and is double-sheared by a bolt 7 and a nut 8. are spliced. Further, the lower portion 36c of the gusset plate 36 is sandwiched between the upper ends 40a of a pair of braces 40, 40 and double-shear-joined with one bolt 7 and nut 8. As shown in FIG.

Then, as shown in FIG. 2, diagonally opposed corners between the base 21 as the lower horizontal member and the horizontal beams 26 as the intermediate horizontal member and between the adjacent left and right pillars 11, 11 20, each pair (two pieces) of braces 40, 40 are arranged so as to alternately cross each other in an X shape. Further, at each diagonally opposed corner 20 between the horizontal beam 26 and the middle girder 22 and between the adjacent left and right columns 11, 11, each pair of braces 40, 40 alternately intersect in an X-shape. are arranged so that As shown in FIG. 15, the four braces 40 are alternately arranged at the crossing portion where each pair of braces 40, 40 cross each other in an X-shape. 15 and 16, the four braces 40 at the intersection are held between a pair of wooden studs 46, 46 attached via bent steel plates 45 for receiving studs at the center of the horizontal beam 26. It is Further, as shown in FIGS. 13 and 17, between the inner and outer rectangular pillar-shaped wooden pieces 13, 13 of the adjacent left and right pillars 11, 11, wooden rectangular base plates 49 are joined by nails (not shown). , forming a load-bearing wall 50 .

In addition, as shown in FIG. 1, the upper end of the column 11 on the first floor, the lower end of the column 11' on the second floor, and the middle girder 22, where the brace 40 as a brace is not arranged, are mounted via a mounting plate 37 made of steel plate. installed. Furthermore, the upper end of the pillar 11' on the second floor and the upper girder 24, on which the brace 40 as a brace is not arranged, are also attached via the mounting plate 37 made of steel plate.

According to the base isolation/earthquake-resistant structure 10 of the combined wooden and lightweight steel frame building 1 of the above embodiment, as shown in FIGS. The right-angled side plates 31, 31 of the two gusset plates 30 are sandwiched between the lower ends 40b of the pair of braces 40, 40 and are double-shear-joined with one bolt 7 and nut 8. As shown in FIG.

Further, as shown in FIGS. 9A and 11A, the lower corners of the gusset plates 35 are formed at the upper ends of the pillars 11 on the first floor, the lower ends of the pillars 11' on the second floor, and the ends of the girders 22 on the middle stage. 35c is sandwiched between the upper ends 40a of a pair of braces 40, 40 and double-shear-joined with one bolt 7 and nut 8, and the upper corner 35b of the gusset plate 35 is connected to the pair of braces. 40, 40 are sandwiched between the lower ends 40b of 40 and joined by a single bolt 7 and a nut 8 in a double-shear joint.

Further, as shown in FIGS. 12 and 16, at both ends of the cross beam 26 and between the adjacent left and right pillars 11, 11, the upper portion 36b of the gusset plate 36 is attached to each lower end of the pair of braces 40, 40. It is clamped by the portion 40b and joined by two-sided shearing with one bolt 7 and nut 8. As shown in FIG. Further, the lower portion 36c of the gusset plate 36 is sandwiched between the upper ends 40a of a pair of braces 40, 40 and double-shear-joined with one bolt 7 and nut 8. As shown in FIG.

In this way, the gusset plates 30, 35, 36 are sandwiched between the pair of braces 40, 40 and joined with a single bolt 7 in a two-sided shear joint. It is possible to ensure high seismic isolation and earthquake resistance performance of the combined building. In other words, compared to the case where the conventional gusset plate is joined to the end of the brace by single-sided shearing with two bolts, it is possible to increase the yield strength by two times. It is possible to greatly improve the high seismic isolation and earthquake resistance performance of the object 1.

Furthermore, as shown in FIG. 2, at each diagonal corner 20 between the base 21 as the lower horizontal member and the horizontal beam 26 as the intermediate horizontal member and between the adjacent left and right pillars 11, 11, By arranging each pair of braces 40, 40 so as to cross each other in an X-shape, it is possible to reduce (halve) the burden load (burden stress) that the horizontal members 21, 22, 26 receive from the column 11. . 2, the tensile axial force received from the lower end 40b of the brace 40 does not transmit the vertical axial force (upward) to the column 11, and the upper end of the brace 40 The tensile axial force is transmitted to the portion 40a, and the horizontal axial force (to the right) is transmitted to the crosspiece 26 together. 2, a vertical axial force (downward) is transmitted to the column 11 and a tensile axial force is transmitted to the upper end 40a of the brace 40. In FIG. 2, the vertical axial force (upward) is transmitted to the column 11 and the horizontal force (rightward) is transmitted to the foundation 2. In FIG. Furthermore, since there is a burden load (downwards) on the stigma of the column 11, this causes a reduction in both vertical directions. 2, a vertical axial force (upward) is transmitted to the column 11 and a horizontal force (leftward) is transmitted to the foundation 2. In FIG. Furthermore, since the burden load (downward direction) exists from the C portion to the E portion of the column 11, reduction in both the vertical direction is caused. In both cases, the horizontal forces of the B portion (right direction) and the A portion (left direction) are also reduced in both the left and right directions. Therefore, stress can be reduced (halved at maximum) in each part. However, the column 11 and girder, the beam 22 and the foundation 2 partially bear stress, but they are all within the allowable stress (proof stress) range.

Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

That is, according to the above-described embodiment, the C-channel steel materials constituting the columns, beams, etc. are bolted back to back, but they may be bolted with a cushioning material interposed between the C-channel steel materials.

Further, according to the above-described embodiment, a pair of braces are arranged in an X-shape and connected to each diagonal corner of the frame on the wall surface side via the gusset plate, but the frame on the floor surface (horizontal surface) side is connected. A pair of braces may be arranged and connected in an X-shape via gusset plates at the respective diagonal corners.

1 Combined wooden and lightweight steel building 2 Foundation 3 Anchor bolts 5, 7 Bolts 10 Seismic isolation/earthquake-resistant structure 11, 11' Column 12 C-channel steel 13 Prismatic wood 15 Support bracket 20 Corner 21 Foundation (lower side horizontal member)
22 girder or beam (upper or lower horizontal member)
23 C-channel steel 24 Girder or beam (upper horizontal member)
25 C-channel steel 26 Horizontal crosspiece (intermediate horizontal crosspiece)
27 C-channel steel material 30, 35, 36 Gusset plate 36d Notch (partial)
40, 40 pair of braces 40a upper end 40b lower end

Claims (5)

Gusset plates respectively attached to diagonally opposing corners between adjacent left and right columns and adjacent upper and lower horizontal members of a combined wooden and light steel frame building;
a pair of braces fastened with bolts while sandwiching the gusset plates attached to the corners at both ends;
with
A base isolation/earthquake-resistant structure for a combined wooden and lightweight steel structure building, wherein the gusset plate is sandwiched between the pair of braces and joined by two-sided shearing with the bolts. The column has four C-channel steel members bolted together, and a prism-shaped piece of wood inserted into each of the C-channel steel members,
2. The seismic isolation and seismic resistance structure of a combined wooden and light steel frame building according to claim 1, wherein said horizontal member comprises two C-channel steel members bolted back to back. 3. The combination of wooden and light steel structures according to claim 2, wherein a part of said gusset plate is sandwiched between at least two of said four C-channel steel members and bolted. Seismic isolation and earthquake-resistant structures for buildings. The four C-channel steel materials are fastened and fixed to anchor bolts protruding upward from the foundation via strut mounting brackets bolted to each end on the foundation side. 3. Seismic isolation/earthquake-resistant structure of the combined wooden and lightweight steel building according to 3. An intermediate horizontal member is attached to an intermediate position between the adjacent left and right pillars arranged on each floor of a combined wooden and light steel frame building,
Between the lower horizontal member and the intermediate horizontal member and between the adjacent left and right columns between the intermediate horizontal member and the upper horizontal member, the pair of braces are staggered. 5. The seismic isolation/seismic structure of a combined wooden and lightweight steel structure building according to any one of claims 1 to 4, characterized in that they are arranged so as to cross each other in an X-shape.

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