Vibration damping structure

Abstract

In 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 response to 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, the structure employs a simple and rational configuration while suitably absorbing vibration energy and improving vibration damping performance. [Solution] As an energy absorption means B, the wooden column-beam frame 10 is provided with a wooden embedding section 45 which is configured as a wooden part and absorbs vibration energy when the corners 21a and 22a of the facing materials 21 and 22 sink in as the facing materials 21 and 22 rock together.

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 interlayer deformation, locking means for locking the facing material within the plane as the wooden column-beam structure undergoes interlayer 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 interlayer 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 left and right 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, when the first facing material and the second facing material are locked within the plane as the wooden column-beam structure undergoes interlayer deformation, the width of the gap between the facing material and the upper and lower wooden beams is set to be sufficiently large so that the facing material does not contact the wooden beam of the wooden column-beam structure, particularly.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the vibration damping structure described in Patent Document 1, vibration energy is absorbed solely by the inter-surface energy absorbing material. However, in situations such as a major earthquake, it is desirable to improve vibration damping performance by suitably absorbing vibration energy using a rational energy absorption means other than the inter-surface energy absorbing material. In view of these circumstances, the main objective of the present invention is to provide a technology for improving vibration damping performance in a vibration damping structure in which a surface 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 surface material, while employing a simple and rational configuration. [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, The energy absorption means is characterized by having a wooden embedding portion that is configured as the wooden part of the wooden column-beam frame and absorbs vibration energy when the corners of the surface material sink in as the surface material rocks.

[0006] According to this configuration, each of the panel materials fitted into a structural plane of the wooden column-beam frame is rocked within the structural plane by the rocking means in accordance with the inter-story deformation of the wooden column-beam frame. As a result of the rocking of the panel materials, the corners of the panel materials sink into the wooden embedded parts, absorbing vibration energy and thus providing a vibration damping effect. Therefore, the present invention provides a vibration damping structure in which a surface 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 surface material, while employing a simple and rational configuration that can suitably absorb vibration energy and improve vibration damping performance.

[0007] A second characteristic configuration of the present invention is that a gap is provided between the surface material and the upper and lower wooden beams, The locking mechanism is composed of locking support members inserted between the upper and lower edges of the facing material and the upper and lower wooden beams.

[0008] In this configuration, the rocking support members are inserted between the upper and lower edges of the panel and the upper and lower wooden beams. As a result, the panel can be rocked in a manner that causes it to swing around the rocking support members relative to the upper and lower wooden beams in accordance with the inter-story deformation of the wooden column-beam frame.

[0009] A third characteristic configuration of the present invention is that the first and second facing materials, which serve as facing materials, are arranged side by side on the left and right within the structural plane. 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. In each of the first and second facing materials, the rocking support member is inserted between a point located outside the center of the upper and lower edges of the facing material and the upper and lower wooden beams.

[0010] 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. As a result of the rocking of the first and second facing members, the energy absorbing material between the facing members deforms and absorbs vibrational energy before the corners of the facing members are embedded in the wooden embedded portion, thereby enabling an early vibration damping effect in the event of an earthquake or other seismic activity. Furthermore, the rocking means provided for each of the first and second panels consists of rocking support members inserted between the upper and lower wooden beams and points located outside the center of the upper and lower edges of the panel. As a result, the first and second panels can be rocked in a manner that swings around the rocking support members located outside the center of the upper and lower wooden beams in accordance with the inter-story deformation of the wooden column-beam frame. In addition, since the joint points for each of the first and second panels in the inter-panel energy absorbing material are separated by a distance greater than half the width of the panel from the line segment along the side of the wooden column that connects the upper and lower rocking support members that are the center of the swing of the first and second panels, the relative displacement of the joint points for each of the first and second panels in the inter-panel energy absorbing material becomes relatively large when the first and second panels rock within the frame plane in accordance with the inter-story deformation of the wooden column-beam frame. Therefore, by significantly deforming the inter-story energy-absorbing material in accordance with the inter-story deformation of the wooden column-beam frame, a sufficient vibration damping effect can be obtained.

[0011] A fourth 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.

[0012] 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]

[0013] [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 second embodiment and its normal state. [Figure 4] Front view showing the configuration of the vibration control structure of the second embodiment and its state during an earthquake. [Modes for carrying out the invention]

[0014] [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.

[0015] 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.

[0016] The first vibration damping structure 100 is provided with an energy absorption means B consisting of an inter-panel energy absorption material 41 and an inter-beam energy absorption material 43. The energy absorber 41 between the facing materials is composed of a viscoelastic body sandwiched in the gap 52 between the facing materials, and is fixed to each of the first facing material 21 and the second facing material 22, and is configured to deform by the rocking of the first facing material 21 and the second facing material 22 as shown in FIG. 2 and absorb vibration energy. In the present embodiment, in the gap 52 between the facing materials extending in the vertical direction, a plurality of energy absorbers 41 between the facing materials are arranged in the vertical direction with a distance therebetween, but the arrangement state of the energy absorbers 41 between the facing materials can be appropriately changed.

[0017] The energy absorber 43 between the beams is composed of a viscoelastic body filled in the gap 50 between the beams, and is configured to deform by the rocking of the first facing material 21 and the second facing material 22 as shown in FIG. 2 and absorb vibration energy. In the present embodiment, the entire gap 50 between the beams extending in the left-right direction is filled with the energy absorber 43 between the beams, but the arrangement state of the energy absorber 43 between the beams can be appropriately changed.

[0018] Furthermore, in the first vibration damping structure 100, the locking means A is composed of a stud wall facing fixing portion 31 that fixes each of the first facing material 21 and the second facing material 22 to the adjacent wooden column 11. More specifically, the stud wall facing fixing portion 31 is composed of brackets, screws, etc. for fixing the side surfaces of the first facing material 21 and the second facing material 22 on the side of the wooden column 11 to the side surface of the wooden column 11.

[0019] That is, by the stud wall facing fixing portion 31 configured as the locking means A, each of the first facing material 21 and the second facing material 22 is fixed to the adjacent wooden column 11. Then, as shown in FIG. 2, the rocking of each of the first facing material 21 and the second facing material 22 accompanying the interlayer deformation of the wooden column-beam structure 10 is in a form that swings around the corner 10a with the wooden column 11 with respect to 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 separated by a relatively long distance corresponding to 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 corner 10a, which is the center of the oscillation of the first and second panels 21 and 22. As a result, as shown in Figure 2, 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 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.

[0020] The first vibration damping structure 100 is provided with a wooden embedding section 45 as the energy absorption means B. This wooden embedding section 45 is configured as the wooden part of the wooden column-beam frame 10, and is configured to absorb vibration energy when the corners 21a of the first panel 21 and 22a of the second panel 22 embed into the first panel 21 and 22 as the first panel 21 and 22 panel 22 rock together as shown in Figure 2. In other words, when the first panel 21 and the second panel 22 rock together within the structural plane 19 due to inter-story deformation of the wooden column-beam frame 10, the inter-panel energy absorber 41 and the inter-beam energy absorber 43 deform first, absorbing vibration energy, thereby providing an early vibration damping effect during earthquakes and other events. Furthermore, even if the wooden column-beam frame 10 undergoes significant inter-story deformation due to a major earthquake or the like, to the extent that the corners 21a and 22a of the panel 21 and 22 are embedded in the wooden embedding section 45, the vibration energy that could not be absorbed by the inter-panel energy absorber 41 and the inter-beam energy absorber 43 can be absorbed by embedding the corners 21a of the first panel 21 and the corners 22a of the second panel 22 into the wooden embedding section 45.

[0021] 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.

[0022] [Second Embodiment] A second embodiment of the vibration damping structure according to the present invention 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.

[0023] 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.

[0024] 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.

[0025] 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).

[0026] 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.

[0027] [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.

[0028] (1) In the above embodiment, an energy absorption material 41 between facing materials and an energy absorption material 43 between beams were provided as energy absorption means B, but one or both of these may be omitted as appropriate.

[0029] (2) In the above embodiment, two first facing material 21 and a second facing material 22 are arranged side by side within one structural plane 19, but the number of facing materials arranged side by side within one structural plane 19 can be changed as appropriate.

[0030] (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]

[0031] 10 Wooden post-beam frame 11 Wooden pillar 12 Wood beam 19 Within the structure 21. First facing material (facing material) 21a Corner 22. Second facing material (facing material) 22a Corner 33. Locking anchor members 41 Inter-panel energy absorbers 45. Wood indentation 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, The energy absorption means includes a vibration damping structure comprising a wooden embedding section, which is configured as the wooden part of the wooden column-beam frame and absorbs vibration energy when the corners of the surface material sink in as the surface material rocks.

2. A gap is provided between the aforementioned surface material and the upper and lower wooden beams. The vibration damping structure according to claim 1, wherein the rocking means is composed of rocking support members inserted between the upper and lower edges of the surface material and the upper and lower wooden beams.

3. 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 vibration damping structure according to claim 2, wherein in each of the first and second panel materials, the rocking support member is inserted between a location outside the center of the upper and lower edges of the panel material and the upper and lower wooden beams.

4. The vibration control structure according to any one of claims 1 to 3, 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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