Vibration damping structure

Abstract

In a vibration damping structure in which a panel fitted within the structural plane of a wooden column-beam frame is rocked within the structural plane in accordance with the inter-story deformation of the wooden column-beam frame, and vibration energy is absorbed by generating a resistance force against the rocking of the panel, a first panel and a second panel are arranged side by side on the left and right within a single structural plane, and an inter-panel energy absorbing material is provided fixed to each of the first and second panels, which deforms due to the rocking of the first and second panels to absorb vibration energy, thereby obtaining a sufficient vibration damping effect while employing a simple and rational configuration. [Solution] Energy absorption means B includes inter-panel energy absorbing material 41 fixed to the first panel 21 and the second panel 22, which deforms due to the rocking of the first panel 21 and the second panel 22 to absorb vibration energy, and rocking means A consists of a wooden column panel fixing part 31 that fixes the first panel 21 and the second panel 22 to an adjacent wooden column 11.

Description

Technical Field

[0001] The present invention relates to a vibration damping structure including a facing material fitted into a plane of a wooden column-beam structure composed of a wooden column and a wooden beam in a state where it can be locked as the wooden column-beam structure undergoes inter-story deformation, locking means for locking the facing material within the plane as the wooden column-beam structure undergoes inter-story deformation, and energy absorption means for generating a resistance force against the locking of the facing material to absorb vibration energy.

Background Art

[0002] As a vibration damping structure applied to a wooden column-beam structure composed of a wooden column and a wooden beam, there is known one in which a facing material fitted into the plane of the wooden column-beam structure is locked within the plane as the wooden column-beam structure undergoes inter-story deformation, and a resistance force is generated against the locking of the facing material to absorb vibration energy. (See, for example, Patent Document 1). The vibration damping structure described in Patent Document 1 has a first facing material and a second facing material arranged side by side horizontally in one plane, and an energy absorber between the facing materials that is fixed to each of the first facing material and the second facing material and is deformed by the locking of the first facing material and the second facing material to absorb vibration energy. Furthermore, in the vibration damping structure described in Patent Document 1, as locking means for locking the first facing material and the second facing material within the plane as the wooden column-beam structure undergoes inter-story deformation, mounting hardware for joining the central portions of the upper and lower sides of each of the first facing material and the second facing material to the upper and lower wooden beams is provided. Also, in locking these facing materials within the plane as the wooden column-beam structure undergoes inter-story deformation, since the facing materials need to swing with respect to the wooden beam, the mounting hardware is configured to have a swinging mechanism that enables the facing materials to swing with respect to the wooden beam.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0004] In the vibration damping structure described in Patent Document 1, as mentioned above, the mounting hardware provided as the rocking means needs to have a swinging mechanism, which leads to problems such as a complicated structure. Furthermore, the center points of the upper and lower edges of the first and second panels are joined to the upper and lower wooden beams by the aforementioned mounting hardware. Therefore, the rocking of the first and second panels in response to inter-story deformation of the wooden column-beam frame takes the form of oscillating around the center points of the upper and lower edges relative to the upper and lower wooden beams. Since the connection points of the inter-panel energy absorber to the first and second panels are located at a relatively short distance, equivalent to half the width of the panels, from the line segment connecting the center points of the upper and lower edges that constitute the oscillation centers of the first and second panels, the relative displacement of the connection points of the first and second panels in the inter-panel energy absorber becomes small when the first and second panels rock in response to inter-story deformation of the wooden column-beam frame. As a result, the deformation of the inter-panel energy absorber in response to inter-story deformation of the wooden column-beam frame is reduced, and in some cases, a sufficient vibration damping effect cannot be obtained. In view of these circumstances, the main objective of the present invention is to provide a vibration damping structure in which a panel material fitted into the structural plane of a wooden column-beam frame is rocked within the structural plane in accordance with the inter-story deformation of the wooden column-beam frame, thereby generating a resistance force against the rocking of the panel material and absorbing vibration energy, wherein a first panel material and a second panel material are arranged side by side on the left and right within a single structural plane, and an inter-panel energy absorbing material is fixed to each of the first and second panel materials and deforms due to the rocking of the first and second panel materials to absorb vibration energy, while employing a simple and rational configuration to obtain a sufficient vibration damping effect. [Means for solving the problem]

[0005] The first characteristic configuration of the present invention is a panel material fitted into the structural plane of a wooden column-beam frame, which consists of wooden columns and wooden beams, in a state that allows it to rock in accordance with inter-story deformation of the wooden column-beam frame, A rocking means for rocking the surface material within the frame plane in response to interstory deformation of the wooden column-beam frame, A vibration damping structure comprising energy absorbing means that generates a resistance force against the rocking of the surface material and absorbs vibration energy, Within the aforementioned structural plane, the first and second facing materials, which serve as facing materials, are arranged side by side on the left and right. The energy absorption means includes inter-panel energy absorbing materials fixed to the first and second panel materials respectively, which deform due to the rocking of the first and second panel materials to absorb vibration energy. The locking means is composed of a wooden column panel fixing part that fixes the first panel and the second panel to the adjacent wooden column.

[0006] According to this configuration, the first and second facing members, each fitted into a structural plane of the wooden column-beam frame, are rocked within the structural plane by the rocking means in accordance with the inter-story deformation of the wooden column-beam frame. This rocking of the first and second facing members causes the inter-facing energy absorbing material to deform and absorb vibrational energy, thereby exhibiting a vibration damping effect. Furthermore, the first and second panels are fixed to adjacent wooden columns by the wooden column panel fixing parts configured as the rocking means described above. As a result, the rocking of the first and second panels in response to the inter-story deformation of the wooden column-beam frame takes the form of oscillating around the corners with respect to the wooden columns relative to the upper and lower wooden beams. The joints between the first and second panels in the inter-panel energy absorber are located at a relatively long distance corresponding to the width of the panels with respect to the line segment along the side of the wooden column connecting the corners with the upper and lower wooden columns that are the center of the oscillation of the first and second panels. Therefore, when the first and second panels rock within the frame plane in response to the inter-story deformation of the wooden column-beam frame, the relative displacement of the joints between the first and second panels in the inter-panel energy absorber becomes large. Thus, the inter-panel energy absorber can be significantly deformed in response to the inter-story deformation of the wooden column-beam frame, thereby obtaining a sufficient vibration damping effect. Accordingly, the present invention provides a vibration damping structure in which a panel material fitted into the structural plane of a wooden column-beam frame is rocked within the structural plane in accordance with the inter-story deformation of the wooden column-beam frame, and vibration energy is absorbed by generating a resistance force against the rocking of the panel material, wherein a first panel material and a second panel material are arranged side by side on the left and right within a single structural plane, and an inter-panel energy absorbing material is fixed to each of the first and second panel materials and deforms due to the rocking of the first and second panel materials to absorb vibration energy, thereby providing a technology that can obtain a sufficient vibration damping effect while employing a simple and rational configuration.

[0007] A second characteristic configuration of the present invention is that a gap is provided between the first and second facing materials and the upper and lower wooden beams. The energy absorption means includes an inter-beam energy absorbing material that is filled into the gap between the beams and deforms due to the rocking of the first and second facing materials to absorb vibrational energy.

[0008] According to this configuration, when the first and second facing members rock within the structural plane due to inter-story deformation of the wooden column-beam frame, the inter-beam energy absorbing material filled in the gap between the beams undergoes compressive deformation, thereby absorbing vibration energy and further improving the vibration damping effect.

[0009] A third characteristic feature of the present invention is that the wooden column-beam frame is constructed by joining the wooden beams and wooden columns in a column-dominant manner.

[0010] According to this configuration, the wooden column-beam frame is constructed by employing a tenon mechanism in which a tenon formed on the end face of a wooden beam is inserted horizontally into a mortise formed on the side of a wooden column, thereby joining the wooden beam and wooden column in a column-dominant manner. Therefore, even when a vertical force acts on the upper and lower wooden beams from the panel material as it rocks within the frame, causing them to move apart from each other, the tenon mechanism for joining in a column-dominant manner can suitably bear this vertical force. [Brief explanation of the drawing]

[0011] [Figure 1] Front view showing the configuration of the vibration damping structure of the first embodiment and its normal state. [Figure 2] Front view showing the configuration of the vibration control structure of the first embodiment and its state during an earthquake. [Figure 3] Front view showing the configuration of the vibration damping structure of the reference embodiment and its normal state. [Figure 4] Front view showing the configuration of the vibration damping structure of the reference embodiment and its state during an earthquake. [Modes for carrying out the invention]

[0012] [First Embodiment] A first embodiment of the vibration damping structure according to the present invention will be described with reference to Figures 1 and 2. The vibration damping structure (hereinafter referred to as the "first vibration damping structure") 100 of this embodiment, as will be described in detail later, includes facing members 21 and 22 fitted into the structural plane 19 of a wooden column-beam frame 10, which consists of wooden columns 11 and wooden beams 12, in a state that allows them to rock in accordance with the inter-story deformation of the wooden column-beam frame 10, as shown in Figure 1. Furthermore, it is provided with a rocking means A that causes the facing members 21 and 22 to rock in the structural plane 19 in accordance with the inter-story deformation of the wooden column-beam frame 10, and an energy absorption means B that generates a resistance force against the rocking of the facing members 21 and 22 to absorb vibration energy. Then, as shown in Figure 2, during an earthquake in which inter-story deformation of the wooden column-beam frame 10 occurs, the facing members 21 and 22 fitted into the structural plane 19 of the wooden column-beam frame 10 rock in the structural plane 19 in accordance with the inter-story deformation of the wooden column-beam frame 10 by the rocking means A. As a result, the energy absorption means B generates a resistance force against the rocking of the surface materials 21 and 22, and the vibration energy is absorbed.

[0013] Within the structural plane 19, the first facing material 21 and the second facing material 22 are arranged side by side on the left and right as the facing materials 21 and 22. Furthermore, in order to make the first facing material 21 and the second facing material 22 lockable within the structural plane 19, as shown in Figure 1, beam gaps 50 are interposed between the first facing material 21 and the second facing material 22 and the respective upper and lower wooden beams 12, and further, a gap 52 is interposed between the first facing material 21 and the second facing material 22.

[0014] In the first vibration damping structure 100, a face material - to - face material energy absorber 41 and a beam - to - beam energy absorber 43 are provided as the energy absorption means B. The face material - to - face material energy absorber 41 is composed of a viscoelastic body sandwiched in a face material gap 52, and is fixed to each of the first face material 21 and the second face material 22. It is configured to deform by the rocking of the first face material 21 and the second face material 22 as shown in FIG. 2 and absorb vibration energy. In this embodiment, in the face material gap 52 extending in the vertical direction, a plurality of face material - to - face material energy absorbers 41 are arranged vertically at intervals from each other. However, the arrangement state of the face material - to - face material energy absorber 41 can be changed as appropriate.

[0015] The beam - to - beam energy absorber 43 is composed of a viscoelastic body filled in a beam gap 50, and is configured to deform by the rocking of the first face material 21 and the second face material 22 as shown in FIG. 2 and absorb vibration energy. In this embodiment, the beam - to - beam energy absorber 43 is filled in the entire beam gap 50 extending in the left - right direction. However, the arrangement state of the beam - to - beam energy absorber 43 can be changed as appropriate.

[0016] Furthermore, in the first vibration damping structure 100, the rocking means A is constituted by a counter - wooden - column face - material fixing portion 31 that fixes each of the first face material 21 and the second face material 22 to an adjacent wooden column 11. More specifically, the counter - wooden - column face - material fixing portion 31 is composed of brackets, screws, etc. for fixing the side surfaces of the first face material 21 and the second face material 22 on the side of the wooden column 11 to the side surface of the wooden column 11.

[0017] That is, by the counter - wooden - column face - material fixing portion 31 configured as the rocking means A, each of the first face material 21 and the second face material 22 is fixed to an adjacent wooden column 11. Then, as shown in FIG. 2, the rocking of each of the first face material 21 and the second face material 22 accompanying the inter - layer deformation of the wooden column - beam structure 10 swings around the corner 10a with the wooden column 11 with respect to the upper and lower wooden beams 12. And the joining locations of the first facing material 21 and the second facing material 22 in the energy absorber 41 between the facing materials are separated by a relatively long distance corresponding to the widths of the first facing material 21 and the second facing material 22 with respect to a line segment along the side surface of the wooden column 11 that connects the corner portions 10a which are the centers of the above-described rocking of the first facing material 21 and the second facing material 22. Then, as shown in FIG. 2, when the first facing material 21 and the second facing material 22 rock within the plane 19 along with the inter-story deformation of the wooden column-beam structure 10, the relative displacement amount of the joining locations of the first facing material 21 and the second facing material 22 in the energy absorber 41 between the facing materials becomes large. Therefore, along with the inter-story deformation of the wooden column-beam structure 10, the energy absorber 41 between the facing materials greatly deforms, and a sufficient vibration damping effect is obtained.

[0018] The first vibration damping structure 100 is provided with a wooden recessed portion 45 as the above-described energy absorbing means B. This wooden recessed portion 45 is configured as a wooden portion of the wooden column-beam structure 10, and is configured to absorb vibration energy by the corner portion 21a of the first facing material 21 and the corner portion 22a of the second facing material 22 being recessed along with the rocking of the first facing material 21 and the second facing material 22 as shown in FIG. 2. That is, when the first facing material 21 and the second facing material 22 rock within the plane 19 along with the inter-story deformation of the wooden column-beam structure 10, first, the energy absorber 41 between the facing materials and the energy absorber 43 between the beams deform to absorb the vibration energy, so that the vibration damping effect is exerted at an early stage during an earthquake or the like. Further, even when the wooden column-beam structure 10 greatly inter-story deforms to such an extent that the corner portions 21a, 22a of the facing materials 21, 22 are recessed into the wooden recessed portion 45 due to a large earthquake or the like, the vibration energy that could not be completely absorbed by the energy absorber 41 between the facing materials and the energy absorber 43 between the beams can be absorbed by causing the corner portion 21a of the first facing material 21 and the corner portion 22a of the second facing material 22 to be recessed into the wooden recessed portion 45.

[0019] In the first vibration control structure 100, the wooden column-beam frame 10 is constructed by joining wooden beams 12 and wooden columns 11 in a column-dominant manner. That is, as shown in Figure 1, the wooden column-beam frame 10 employs a tenon mechanism 15 in which a tenon 17 formed on the end face of the wooden beam 12 is inserted horizontally into a mortise hole 16 formed on the side surface of the wooden column 11. Therefore, as shown in Figure 2, when the first panel 21 and the second panel 22 rock in the frame plane 19, if a vertical force acts from the first panel 21 and the second panel 22 on the upper and lower wooden beams 12 to move them apart from each other, the tenon mechanism 15 for joining in a column-dominant manner will suitably bear that vertical force.

[0020] [Reference Embodiment] A reference embodiment of the vibration damping structure will be described with reference to Figures 3 and 4. In this embodiment, components similar to those in the first vibration damping structure 100 (see Figures 1 and 2) described above will be denoted by the same reference numerals in the drawings, and their descriptions may be omitted.

[0021] The vibration damping structure (hereinafter referred to as the "second vibration damping structure") 200 of this embodiment includes facing members 21 and 22 fitted into the structural plane 19 of the wooden column-beam frame 10, as shown in Figure 3. Furthermore, a rocking means A and an energy absorption means B are provided. As shown in Figure 4, during an earthquake in which inter-story deformation occurs in the wooden column-beam frame 10, the facing members 21 and 22 fitted into the structural plane 19 of the wooden column-beam frame 10 rock in the structural plane 19 in accordance with the inter-story deformation of the wooden column-beam frame 10 by the rocking means A. Then, a resistance force is generated by the energy absorption means B against the rocking of the facing members 21 and 22, and vibration energy is absorbed.

[0022] The second vibration damping structure 200, like the first vibration damping structure 100 described above, is provided with an energy absorption means B consisting of an inter-panel energy absorption material 41, an inter-beam energy absorption material 43, and a wood-filled section 45.

[0023] Furthermore, in the second vibration damping structure 200, the rocking means A consists of rocking support members 33 made of a relatively rigid material that are inserted between the upper and lower edges of the first panel 21 and the second panel 22 and the upper and lower wooden beams 12 (beam gap 50). More specifically, in each of the first panel 21 and the second panel 22, the rocking support members 33 are inserted between the upper and lower wooden beams 12 and a location that is outward from the center of the upper and lower edges of the first panel 21 and the second panel 22 (towards the adjacent wooden column 11).

[0024] In other words, since the rocking means A provided for each of the first and second facing members 21 and 22 consists of rocking support members 33 inserted between the upper and lower wooden beams 12 and the points located outside the center of the upper and lower edges of the facing members 21 and 22, as shown in Figure 4, the rocking of the first and second facing members 21 and 22 in response to inter-story deformation of the wooden column-beam frame 10 takes the form of swinging around the rocking support members 33 located outside the center of the upper and lower wooden beams 12. Furthermore, the joints between the first and second panels 21 and 22 in the inter-panel energy absorbing material 41 are located at a distance greater than half the width of the first and second panels 21 and 22 with respect to the line segment along the side surface of the wooden column 11 that connects the upper and lower rocking support members 33, which are the centers of the oscillation of the first and second panels 21 and 22. As a result, as shown in Figure 4, when the first and second panels 21 and 22 rock within the structural plane 19 due to the inter-story deformation of the wooden column-beam frame 10, the relative displacement of the joints between the first and second panels 21 and 22 in the inter-panel energy absorbing material 41 becomes relatively large. Therefore, the inter-panel energy absorbing material 41 deforms significantly with the inter-story deformation of the wooden column-beam frame 10, and a sufficient vibration damping effect is obtained. In this embodiment, the insertion points of the rocking support members 33 in the gap 50 between beams are located outside the center points of the upper and lower edges of the first and second facing members 21 and 22, respectively. However, the insertion points of the rocking support members 33 can be changed as appropriate.

[0025] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0026] (1) In the above embodiment, the energy absorption means B is provided as an energy absorption material between beams 43 and a wood-filled section 45, but one or both of these may be omitted as appropriate.

[0027] (2) In the above embodiment, two first facing materials 21 and a second facing material 22 are arranged side by side within a single structural plane 19, and an inter-facing energy absorbing material 41 is provided in the gap 52 between the two facing materials 21 and 22. However, three or more facing materials may be arranged side by side within a single structural plane 19, and an inter-facing energy absorbing material may be provided in each of the multiple gaps between the facing materials formed between them.

[0028] (3) In this embodiment, the wooden beam 12 and the wooden column 11 are joined in a column-dominant manner in the wooden column-beam frame 10, but the wooden beam 12 and the wooden column 11 may also be joined in a beam-dominant manner. That is, a tenon mechanism may be adopted in which tenons 17 formed on the upper and lower end faces of the wooden column 11 are inserted vertically into mortise holes 16 formed on the upper and lower faces of the wooden beam 12. [Explanation of symbols]

[0029] 10 Wooden post-beam frame 11 Wooden pillar 12 Wood beam 19 Within the structure 21. First facing material (facing material) 22. Second facing material (facing material) 31 Fixed part for wooden column surface material 41 Inter-panel energy absorbers 43. Energy absorbing material between beams 50 Beam gap 100 First vibration control structure 200 Second vibration control structure A locking mechanism B Energy absorption means

Claims

1. A panel material fitted into the structural plane of a wooden column-beam frame, which consists of wooden columns and wooden beams, in a state that allows it to rock in accordance with inter-story deformation of the wooden column-beam frame, A rocking means for rocking the surface material within the frame plane in response to interstory deformation of the wooden column-beam frame, A vibration damping structure comprising energy absorbing means that generates a resistance force against the rocking of the surface material and absorbs vibration energy, Within the aforementioned structural plane, the first and second facing materials, which serve as facing materials, are arranged side by side on the left and right. The energy absorption means includes inter-panel energy absorbing materials fixed to the first and second panel materials respectively, which deform due to the rocking of the first and second panel materials to absorb vibration energy. The rocking means is a vibration damping structure comprising a wooden column surface material fixing part that fixes the first surface material and the second surface material to an adjacent wooden column.

2. A gap is provided between the first and second facing materials and the upper and lower wooden beams. The vibration damping structure according to claim 1, further comprising, as the energy absorbing means, an inter-beam energy absorbing material that is filled into the gap between the beams and deforms due to the rocking of the first and second surface materials to absorb vibration energy.

3. The vibration control structure according to claim 1 or 2, wherein the wooden column-beam frame is constructed by joining the wooden beam and the wooden column in a column-dominant manner.

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