Wooden vibration damping structure

Abstract

To improve the seismic performance of a frame structure having wooden columns and wooden beams. [Solution] The wooden seismic-resistant frame 100 comprises a plurality of wooden structural units U1 to U6, each having a plurality of wooden columns 12 arranged at predetermined intervals and a plurality of wooden beams 20, 22 joined to the wooden columns 12, and a first connecting member 30 that connects the wooden beams 20, 22 of adjacent wooden structural units U1 to U6 in the direction of their material axis. The first connecting member 30 has a damper function that suppresses the difference in behavior that occurs between the wooden structural units U1 to U6 connected via the first connecting member 30. The plurality of wooden beams 20, 22 extending in the same direction each have different protruding lengths from the wooden columns 12 to the ends to which the first connecting member 30 is attached. The yield stress of the first connecting member 30 that connects wooden beams with long protruding lengths from the wooden columns 12 is set to be smaller than the yield stress of the first connecting member 30 that connects wooden beams with short protruding lengths from the wooden columns 12.

Description

Technical Field

[0001] The present invention relates to a wooden seismic isolation structure having wooden columns and wooden beams.

Background Art

[0002] Patent Document 1 discloses a wooden structure in which a wooden beam is joined to a wooden column.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the wooden ramen structure in which a wooden beam is joined to a column as described in Patent Document 1, it is difficult to achieve a complete rigid joint, so the rigidity of the structure cannot be sufficiently increased, and there is a risk that the seismic performance of the entire building will be insufficient. To increase the rigidity of the wooden ramen structure, for example, countermeasures such as increasing the number of columns and beams or increasing the cross-sectional size of the columns and beams can be considered. However, if these countermeasures are taken, the construction cost will increase due to the increase in material costs, and the indoor space that can be freely used will decrease because the columns and beams protrude into the indoor space. It is difficult to ensure sufficient seismic performance without tolerating these demerits.

[0005] An object of the present invention is to improve the seismic performance of a structure having wooden columns and wooden beams.

Means for Solving the Problems

[0006] The present invention relates to a wooden seismic-resistant frame having wooden columns and wooden beams, comprising: a plurality of wooden structural units having a plurality of wooden columns arranged at predetermined intervals and a plurality of wooden beams joined to the wooden columns; and a first connecting member that connects the wooden beams of adjacent wooden structural units in the direction of their material axis, wherein the first connecting member has a damper function that suppresses the difference in behavior that occurs between wooden structural units connected via the first connecting member, adjacent wooden structural units are connected to each other by a plurality of wooden beams extending in the same direction, the plurality of wooden beams each have different protruding lengths from the wooden columns to the ends to which the first connecting member is attached, and the yield stress of the first connecting member connecting wooden beams with long protruding lengths from the wooden columns is set to be smaller than the yield stress of the first connecting member connecting wooden beams with short protruding lengths from the wooden columns. [Effects of the Invention]

[0007] According to the present invention, the seismic performance of a frame having wooden columns and wooden beams can be improved. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing a side view of a wooden building using a wooden seismic control frame according to an embodiment of the present invention. [Figure 2] This is a cross-sectional view showing a section along line AA in Figure 1. [Figure 3] This is a cross-sectional view showing the cross-section along line BB in Figure 1. [Figure 4] This is an enlarged view showing section C in Figure 1. [Figure 5] This is a diagram illustrating the operation of the first connecting member. [Figure 6] This is an enlarged view showing section D in Figure 1. [Figure 7] This is an enlarged view showing section E of Figure 1. [Modes for carrying out the invention]

[0009] Hereinafter, with reference to the drawings, a wooden seismic-resistant frame according to an embodiment of the present invention will be described.

[0010] The wooden seismic damping frame 100 according to an embodiment of the present invention is a seismic damping frame for improving the seismic resistance of wooden buildings composed of wooden columns and wooden beams, and comprises a plurality of wooden structural units U1 to U6 having a plurality of wooden columns 12 arranged at predetermined intervals and a plurality of wooden beams 20, 22 joined to the wooden columns 12, as shown in Figures 1 to 3, and a first connecting member 30 that connects the wooden beams 20, 22 of adjacent wooden structural units U1 to U6. Although Figures 1 to 3 show an example in which six wooden structural units U1 to U6, from the first wooden structural unit U1 to the sixth wooden structural unit U6, are arranged, the number and arrangement of wooden structural units U1 to U6 are not limited thereto.

[0011] Figure 1 is a side view of a wooden building in which the wooden seismic-resistant frame 100 is used. Flooring and wall materials are omitted to make the structure of the wooden seismic-resistant frame 100 easier to understand. In the example shown in Figure 1, the wooden seismic-resistant frame 100 is used on multiple floors of the wooden building, and each wooden column 12 is erected on the foundation 1 on the first floor. The wooden seismic-resistant frame 100 may be applied to only some of the floors of the multiple floors (for example, only the lowest floor), or it may be applied only to the upper floors if the lower floors are, for example, steel frame, reinforced concrete, or reinforced steel-reinforced concrete.

[0012] The wooden columns 12 and wooden beams 20 and 22 are square timbers formed from solid wood or laminated timber, and may consist, for example, a core material that functions as a load-bearing part, a fire-stopping layer provided to cover the core material, and a decorative material placed on the surface. The cross-sectional shape of the wooden columns 12 and wooden beams 20 and 22 is not limited to a rectangular shape, but may also be circular or elliptical.

[0013] The wooden beams 20 and 22 are through beams that penetrate multiple wooden columns 12, and are divided into an upper beam 20 and a lower beam 22 that is positioned below the upper beam 20 at a predetermined distance and intersects with the upper beam 20. In the following explanation, the direction in which the upper beam 20 extends will be referred to as the X-axis direction, the direction in which the lower beam 22 extends as the Y-axis direction, and the vertical direction as the Z-axis direction.

[0014] As shown in Figures 2 and 3, multiple wooden columns 12 are provided within each wooden structural unit U1 to U6 at predetermined intervals along the X-axis direction in which the upper beam 20 extends (for example, intervals of 0.2 to 2 times the length of the wooden column 12 in the X-axis direction, preferably 0.5 to 1 times), and multiple wooden columns 12 are also provided at predetermined intervals along the Y-axis direction in which the lower beam 22 extends (for example, intervals of 0.2 to 2 times the length of the wooden column 12 in the Y-axis direction, preferably 0.5 to 1 time). In other words, the wooden columns 12 are arranged in a relatively dense grid pattern along the X-axis and Y-axis directions, forming a combined column 10 that resembles a single column. Note that the arrangement of the wooden columns 12 is not limited to a grid pattern; the combined column 10 can be formed by multiple wooden columns 12, and for example, an irregular arrangement or a partially curved arrangement is also acceptable.

[0015] Specifically, for example, the first timber structure unit U1 has a maximum of 7 timber columns 12 along the X-axis and a maximum of 4 timber columns 12 along the Y-axis, with a total of 16 timber columns 12 forming one column assembly 10. Similarly, the second timber structure unit U2 has a maximum of 4 timber columns 12 along the X-axis and a maximum of 4 timber columns 12 along the Y-axis, with a total of 10 timber columns 12 forming one column assembly 10.

[0016] In addition, in order to secure an indoor space S surrounded by each of the wooden structure units U1 to U6, the arrangement of the wooden columns 12 of each of the wooden structure units U1 to U6 is set such that the number of wooden columns 12 arranged on the indoor space S side is reduced. Since the number of wooden columns 12 arranged on the indoor space S side is thus reduced, the lengths of the wooden beams 20 and 22 extending toward the adjacent wooden structure units U1 to U6 are longer for the wooden beams 20 and 22 arranged closer to the indoor space S and shorter for the wooden beams 20 and 22 arranged farther from the indoor space S. In other words, the distance (span) between the wooden columns 12 is longer closer to the indoor space S.

[0017] Note that the arrangement of the wooden columns 12 of each of the wooden structure units U1 to U6 shown in FIGS. 2 and 3 is an example and is not limited thereto. For example, the wooden columns 12 of each of the wooden structure units U1 to U6 may be provided in the same number along the X-axis direction and the Y-axis direction. In this case, the distance between the wooden columns 12 is the same length regardless of the distance from the indoor space S.

[0018] In this way, although the number of wooden columns 12 increases because each of the wooden structure units U1 to U6 is provided with a built-up column 10 composed of a plurality of wooden columns 12, the rigidity of the structure is increased, enabling long-span construction. As a result, a sufficient indoor space S can be secured. In FIGS. 1 and 2, a part of the upper beam 20 in the X-axis direction is shown omitted, and in FIG. 3, a part of the lower beam 22 in the Y-axis direction is shown omitted. However, the actual lengths of the upper beam 20 and the lower beam 22 are lengths corresponding to long-span construction.

[0019] The first connecting member 30 that connects the wooden beams 20 and 22 of adjacent wooden structure units U1 to U6 is a so-called steel damper. As shown in FIG. 4, it includes a damping portion 33 having a small cross-sectional portion 33a, a fixing portion 34 for fixing the damping portion 33, a damper steel plate 32 provided with these, and a mounting steel plate 36 for attaching the damper steel plate 32 to the wooden beams 20 and 22.

[0020] The fixing portions 34 of the damper steel plates 32 are fastened to the mounting steel plates 36 fixed to the ends of the wooden beams 20 and 22 extending from the adjacent wooden structure units U1 to U6 by fastening members such as bolts (not shown), whereby the adjacent wooden structure units U1 to U6 are connected via the first connecting member 30. Insertion grooves (not shown) into which the mounting steel plates 36 are inserted are formed at the ends of the wooden beams 20 and 22 to which the first connecting member 30 is attached, and the mounting steel plates 36 are fixed to the insertion grooves in advance via an adhesive or the like.

[0021] Here, when a horizontal force caused by an earthquake or the like acts on the building and the wooden columns 12 of the wooden structure units U1 to U6 tilt, as shown in FIG. 5, the ends of the wooden beams 20 and 22 to which the first connecting member 30 is attached are displaced in the vertical direction (the vertical direction) according to the tilt, and a displacement difference D1 occurs between the wooden beams 20 and 22 connected by the first connecting member 30.

[0022] According to this displacement difference D1, antisymmetric bending moments act on the damping portion 33 of the damper steel plate 32 disposed between the wooden beams 20 and 22, so that the damping portion 33 is plastified.

[0023] When the first connecting member 30 is deformed, the energy of the horizontal force is absorbed by the first connecting member 30, and the horizontal force acting on the wooden columns 12 of the wooden structure units U1 to U6 is attenuated, so that the sway of the entire building caused by an earthquake or the like is suppressed.

[0024] As described above, the first connecting member 30 functions as a damper member that utilizes the elastoplastic performance of steel and suppresses the behavioral difference occurring between the two wooden structure units U1 to U6 connected via the first connecting member 30 by absorbing energy through deformation.

[0025] Also, as described above, the adjacent wooden structure units U1 to U6 are connected to each other by a plurality of wooden beams 20 and 22 extending in the same direction, but the protruding lengths of the plurality of wooden beams 20 and 22 from the wooden columns 12 to the ends to which the first connecting member 30 is attached are different from each other.

[0026] Specifically, for example, the first timber structural unit U1 and the second timber structural unit U2 shown in the lower left of Figure 2 are connected to each other by multiple upper beams 20A, 20B, and 20C extending in the same direction. However, the protruding length from the timber column 12 to the end to which the first connecting member 30 is attached is longest for the first upper beam 20A, which is positioned closest to the indoor space S, and shorter for the third upper beam 20C, which is positioned furthest from the indoor space S, than for the first upper beam 20A and the second upper beam 20B, which are positioned closer to the indoor space S.

[0027] As described above, if the protruding lengths from the wooden columns 12 to the end to which the first connecting member 30 is attached are different, the stress generated at the connection point of the first upper beam 20A, which is located on a beam with a relatively long distance between the wooden columns 12, will be relatively small, while the stress generated at the connection point of the third upper beam 20C, which is located on a beam with a relatively short distance between the wooden columns 12, will be relatively large.

[0028] Here, since the first connecting member 30 produces a damping effect by yielding and deforming, it is desirable to select a member with a low yield stress, i.e., one that is easily plastically deformed, in areas where the generated stress is relatively small, and a member with a high yield stress, in areas where the generated stress is relatively large.

[0029] Therefore, the yield stress of the first connecting member 30A provided between the first upper beams 20A is set to be smaller than the yield stress of the first connecting member 30B provided between the second upper beams 20B and the first connecting member 30C provided between the third upper beams 20C, and the yield stress of the first connecting member 30B provided between the second upper beams 20B is set to be smaller than the yield stress of the first connecting member 30C provided between the third upper beams 20C. The yield stress of the first connecting member 30 can be changed to any size by, for example, changing the thickness of the damper steel plate 32 or the number of damper steel plates 32.

[0030] As a result, even if the distance between the wooden columns 12 is different, the behavioral differences that occur between the first wooden structural unit U1 and the second wooden structural unit U2 can be effectively suppressed by the first connecting members 30A, 30B, and 30C. Although the upper beam 20 was used as an example for this explanation, the same applies to the first connecting member 30 that connects the lower beam 22.

[0031] Thus, the yield stress of the first connecting member 30 that connects wooden beams 20 and 22 with relatively long protrusions from the wooden column 12 is set to be smaller than the yield stress of the first connecting member 30 that connects wooden beams 20 and 22 with relatively short protrusions from the wooden column 12.

[0032] Furthermore, the timber structural units U1 to U6 further include a second connecting member 40 in order to suppress differences in behavior that occur between the timber columns 12 within the unit.

[0033] As shown in Figure 1, the second connecting member 40 connects adjacent wooden columns 12 within the unit, and as shown in Figure 6, similar to the first connecting member 30, it comprises a damper steel plate 42 having a damping section 43a with a small cross-section 43a and a fixing section 44 for fixing the damping section 43, and a mounting steel plate 46 for attaching the damper steel plate 42 to the wooden column 12.

[0034] The fixing portion 44 of the damper steel plate 42 is fastened to the mounting steel plate 46 fixed to the side surface of the wooden column 12 in each wooden structural unit U1 to U6 by fastening members such as bolts (not shown), thereby connecting adjacent wooden columns 12 within the unit via the second connecting member 40. An insertion groove (not shown) is formed on the side surface of the wooden column 12 to which the second connecting member 40 is attached, into which the mounting steel plate 46 is inserted, and the mounting steel plate 46 is fixed in the insertion groove in advance using adhesive or the like.

[0035] Here, when a horizontal force caused by an earthquake or the like acts on the building and the wooden columns 12 of each wooden structural unit U1 to U6 tilt, a difference in vertical displacement occurs between the wooden columns 12 connected by the second connecting member 40, corresponding to the tilt.

[0036] In accordance with this displacement difference, an inversely symmetrical bending moment acts on the damping portion 43 of the damper steel plate 42 positioned between the wooden columns 12, causing the damping portion 43 to plastically deform.

[0037] As the second connecting member 40 deforms, the energy of the horizontal force is absorbed by the second connecting member 40, and the horizontal force acting on the wooden columns 12 of each wooden structural unit U1 to U6 is attenuated, thereby suppressing the shaking of the entire building caused by earthquakes and other events.

[0038] In this way, the second connecting member 40 utilizes the elastoplastic properties of the steel material and functions as a damper member that suppresses the behavioral differences that occur between the wooden columns 12 in each wooden structural unit U1 to U6 connected via the second connecting member 40 by absorbing energy through deformation.

[0039] Furthermore, since the stress generated in the upper layer is smaller than that in the lower layer, a second connecting member 40 that yields under less stress than the second connecting member 40 installed in the lower layer may be installed in the upper layer.

[0040] Furthermore, in the example shown in Figure 1, one second connecting member 40 is provided at the intermediate floor level, but the number of second connecting members 40 is not limited to this, and for example, multiple members may be arranged in the vertical direction.

[0041] Furthermore, the location where the second connecting member 40 is installed is not limited to the intermediate floor level where adjacent wooden columns 12 are directly connected, but may also be at the beam level where the wooden beams 20 and 22 are installed. In this case, the mounting steel plate 46 is fixed to the ends of the wooden beams 20 and 22, respectively. In this case as well, the second connecting member 40 can suppress the behavioral differences that occur between the wooden columns 12 within each wooden structural unit U1 to U6, which are indirectly connected by the second connecting member 40 via the wooden beams 20 and 22.

[0042] Furthermore, unlike the first connecting member 30 described above and the third connecting member 50 described later, the second connecting member 40 is a member that is pre-installed in each timber structure unit U1 to U6 at the factory. Therefore, it may be configured without a mounting steel plate 46. In other words, the fixing portion 44 of the damper steel plate 42 is directly inserted into the insertion groove formed on the side of the timber column 12 or the end of the timber beams 20 and 22 instead of the mounting steel plate 46, and fixed with adhesive or the like.

[0043] Furthermore, the timber structural units U1 to U6 each have a third connecting member 50 that connects the timber beams 20 and 22 to each other within the unit.

[0044] The third connecting member 50 is provided at the points where the wooden structural units U1 to U6 are separated during transportation, and as shown in Figures 1 to 3, it is provided, for example, at the position where wooden beams 20 and 22 are connected to each other within the unit.

[0045] In this configuration, the wooden structural units U1 to U6 are assembled in a factory by joining multiple wooden beams 20 and 22 to multiple wooden columns 12, and by attaching the steel plates 36 for the first connecting member 30 and the second connecting member 40 to the designated locations. After these attachments are completed, the units are transported to the construction site by transport vehicles such as large trucks. However, the size of the cargo that can be transported by these transport vehicles is stipulated by the Road Traffic Act.

[0046] Therefore, in order to transport the wooden structural units U1 to U6 by transport vehicle, it is necessary to divide each wooden structural unit U1 to U6 into pieces that can be loaded onto the transport vehicle.

[0047] Therefore, by appropriately providing a third connecting member 50 within each of the timber structural units U1 to U6, that is, by configuring the timber structural units U1 to U6 to be divided at the locations where the third connecting member 50 is provided, each of the timber structural units U1 to U6 can be disassembled into groups of members of a predetermined size.

[0048] Furthermore, the length of each wooden column 12 in each wooden structural unit U1 to U6 is set within a range that can be loaded onto a transport vehicle, and each wooden column 12 is configured to be able to be sequentially joined in the vertical direction via connecting hardware (not shown).

[0049] The third connecting member 50, as shown in Figure 7, for example, similar to the first connecting member 30, comprises a damper steel plate 52 having a damping portion 53a with a small cross-section portion 53a and a fixing portion 54 for fixing the damping portion 53, and a mounting steel plate 56 for attaching the damper steel plate 52 to the wooden beams 20, 22.

[0050] The fixing portion 54 of the damper steel plate 52 is fastened to the mounting steel plate 56 fixed to the ends of the wooden beams 20 and 22 in each wooden structural unit U1 to U6 by fastening members such as bolts (not shown), thereby connecting the wooden beams 20 and 22 that extend in the same direction within the unit via the third connecting member 50. Insertion grooves (not shown) are formed at the ends of the wooden beams 20 and 22 to which the third connecting member 50 is attached, into which the mounting steel plate 56 is inserted, and the mounting steel plate 56 is fixed in the insertion groove in advance using adhesive or the like.

[0051] By making the third connecting member 50 have the same configuration as the second connecting member 40 described above, it is possible to make the third connecting member 50 function as a damper member that suppresses the difference in behavior that occurs between the wooden columns 12 in each wooden structural unit U1 to U6 that are indirectly connected via the third connecting member 50. Note that the third connecting member 50 does not have to be a damper member; it can be any member that can connect the wooden beams 20 and 22 to each other within the unit, for example, it could be a simple steel plate, but by making it a damper member, it is possible to further improve the seismic resistance of the building.

[0052] The mounting steel plate 56 for the third connecting member 50 is fixed in advance to the ends of the wooden beams 20 and 22 at the factory, while the damper steel plate 52 of the third connecting member 50 is attached after the group of members constituting each wooden structural unit U1 to U6 has been transported to the construction site.

[0053] This makes it possible to easily assemble each of the timber structural units U1 to U6 at the construction site.

[0054] Then, each of the assembled wooden structural units U1 to U6 is connected to and integrated with one another by attaching the damper steel plate 32 of the first connecting member 30 described above. This makes it easy to assemble a building composed of multiple wooden structural units U1 to U6.

[0055] Furthermore, if the size of the wooden structural units U1 to U6 is within the range of a size that can be loaded onto a transport vehicle, that is, if there is no need to divide the units, then the third connecting member 50 does not need to be provided within the wooden structural units U1 to U6.

[0056] Furthermore, the location where the third connecting member 50 is provided is not limited to the location where the wooden beams 20 and 22 are connected to each other within the unit, but may be provided at the location where each wooden structural unit U1 to U6 is separated when transported. For example, it may be at the location where the wooden beams 20 and 22 are connected to the wooden column 12 within the unit. In this case, one mounting steel plate 56 is fixed to the end of the wooden beams 20 and 22, and the other mounting steel plate 56 is fixed to the side of the wooden column 12. Also, the location where the third connecting member 50 is provided may be at the location where the wooden columns 12 are connected to each other within the unit, in which case the mounting steel plates 56 are fixed to the sides of the wooden columns 12.

[0057] According to the above embodiments, the following effects are achieved.

[0058] In the above-described wooden seismic-resistant frame 100, multiple wooden columns 12 and multiple wooden beams 20, 22 are unitized as wooden structural units U, and adjacent wooden structural units U are connected by the wooden beams 20, 22 being connected to each other via a first connecting member 30 which has a damping function.

[0059] In this way, by forming a unit having a column assembly 10 with multiple timber columns 12 and multiple timber beams 20, 22, it is possible to increase the rigidity of the entire frame, and by connecting the timber beams 20, 22 that connect the units to each other via a first connecting member 30 that has a damping function, it is possible to improve the seismic damping performance of the frame.

[0060] This enhances the rigidity and seismic damping performance of the wooden seismic-resistant frame 100, which has wooden columns 12 and wooden beams 20 and 22. As a result, the seismic performance of the wooden seismic-resistant frame 100 can be improved. Furthermore, the increased rigidity of the wooden seismic-resistant frame 100 allows for longer spans, making it possible to secure an open and highly flexible indoor space S.

[0061] Furthermore, the timber structural unit U is provided with a second connecting member 40 having a damping function, which connects adjacent timber columns 12 within the unit directly or indirectly. This enhances the rigidity and seismic damping performance of the timber structural unit U, and as a result, the seismic damping performance of the timber seismic-resistant frame 100 having timber columns 12 and timber beams 20, 22 can be further improved.

[0062] Furthermore, the timber structural unit U is provided with a third connecting member 50 at the point where it is divided during transportation. This makes it possible to easily transport the timber structural unit U, which has been assembled in a factory or the like, to the construction site in sections, and to easily assemble the timber structural unit U at the construction site. As a result, buildings made up of timber structural units U can be easily assembled, and the production efficiency and transportation efficiency of the timber structural unit U are improved, thereby reducing construction costs.

[0063] Furthermore, the following modifications are also within the scope of the present invention, and it is possible to combine the configurations shown in the modifications with the configurations described in the embodiments described above, or to combine the configurations described in the following different modifications.

[0064] In the above embodiment, each connecting member 30, 40, and 50 is a steel damper made of a metal material. Alternatively, the damping member may be any form of damper as long as it has a structure capable of absorbing energy. For example, it may be a viscoelastic or viscous damper, a friction damper that absorbs energy using friction, or a honeycomb damper (registered trademark) formed by arranging multiple hexagonal holes in a steel plate.

[0065] Furthermore, in the above embodiment, the upper beam 20 and the lower beam 22 are through beams that penetrate multiple wooden columns 12. Alternatively, the upper beam 20 and the lower beam 22 may be beams whose ends are joined to the wooden columns 12 without penetrating them. In other words, the upper beam 20 and the lower beam 22 may be separated at the location where the wooden columns 12 are provided. Also, if the ends of each wooden beam 20, 22 are joined to the wooden columns 12, the wooden beams 20, 22 may be arranged at the same level without being divided into upper and lower beams.

[0066] Furthermore, although the above embodiment describes a case in which each timber structural unit U1 to U6 is pre-assembled in a factory and then transported to the construction site in sections, each timber structural unit U1 to U6 may also be constructed by assembling the timber columns 12 and timber beams 20, 22 at the construction site.

[0067] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of Symbols]

[0068] 100...Wooden vibration control frame U1~U6...Wooden structural unit 10...Pillars 12...wooden pillar 20... Upper beam (wooden beam) 20A...1st upper beam (wooden beam) 20B...2nd upper beam (wooden beam) 20C...Third upper beam (wooden beam) 22...Lower beam (wooden beam) 30, 30A~30C...First connecting member 40...Second connecting member 50...Third connecting member D1...Displacement difference

Claims

1. A wooden seismic-resistant frame having wooden columns and wooden beams, A plurality of wooden structural units having a plurality of wooden columns arranged at predetermined intervals and a plurality of wooden beams joined to the wooden columns, It comprises a first connecting member that connects the timber beams of adjacent timber structural units in the direction of their material axis, The first connecting member has a damper function that suppresses the difference in behavior that occurs between the wood structural units connected via the first connecting member. Adjacent wooden structural units are connected to each other by a plurality of wooden beams extending in the same direction. Each of the multiple wooden beams has a different protruding length from the wooden column to the end to which the first connecting member is attached. The yield stress of the first connecting member connecting the wooden beams that have a long protrusion length from the wooden column is set to be smaller than the yield stress of the first connecting member connecting the wooden beams that have a short protrusion length from the wooden column. Wooden vibration damping structure.

2. The aforementioned wooden structural unit further includes a second connecting member that directly or indirectly connects adjacent wooden columns within the unit. The second connecting member has a damping function to suppress the difference in behavior that occurs between the wooden columns connected via the second connecting member. The wooden seismic-resistant frame according to claim 1.

3. The aforementioned wooden structural unit further includes a third connecting member that connects the wooden beams to each other, the wooden columns to each other, or the wooden beams and wooden columns within the unit. The third connecting member is provided at a location where the wooden structural unit can be separated when transporting it. A wooden seismic-resistant frame according to claim 1 or 2.

Images