Vibration control structure for roof structure

Abstract

To absorb vibration energy for a roof structure moving vertically, to reduce vibration of the roof structure.SOLUTION: A vibration control structure for a roof structure comprises: a roof structure; a protrusion member attached to an outer peripheral part of the roof structure, and protruding laterally; a support member fixed to a foundation, and supporting a base end part of the protrusion member so that it can swing; a vibration control damper whose one end is attached to a tip part of the protrusion member, and which is arranged to reduce vertical vibration of the tip part and extend in a vertical direction; and another support member supporting the other end of the vibration control damper so that it can move laterally relative to the foundation.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a vibration control structure for a roof structure. [Background technology]

[0002] The structure described in Patent Document 1 is a structure comprising an upper structure, a lower structure, and a support member provided between the upper structure and the lower structure to allow rotation, characterized in that a vibration-damping member connecting the upper structure and the lower structure is provided on the side of the support member, and the vibration-damping member is rotatably attached to at least one of the upper structure and the lower structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-073925 A Summary of the Invention [Problem to be solved by the invention]

[0004] Large-span roof structures vibrate significantly in the vertical direction during an earthquake.

[0005] An object of the present disclosure is to reduce vibration of a roof structure by absorbing the vibration energy of the roof structure vibrating in the vertical direction. [Means for solving the problem]

[0006] The vibration control structure for a roof structure in the first embodiment is characterized in that it comprises a roof structure, a protruding member attached to the outer periphery of the roof structure and protruding laterally, a support member fixed to a foundation and supporting the base end of the protruding member so that it can swing, a vibration control damper having one end attached to the tip end of the protruding member and arranged to extend in the vertical direction while reducing vertical vibration of the tip end, and another support member supporting the other end of the vibration control damper so that it can move laterally relative to the foundation.

[0007] According to the above aspect, the support member supports the base end of the protruding member so that the base end can swing. As a result, the tip end of the protruding member vibrates in the vertical direction in response to the vertical vibration of the roof structure. As the tip end of the protruding member vibrates in the vertical direction, the vibration damper expands and contracts to absorb the vibration energy, thereby reducing the vertical vibration of the tip end of the protruding member.

[0008] The vertical vibration of the roof structure is reduced by reducing the vertical vibration of the tip of the protruding member. In other words, the vibration damper indirectly absorbs the vibration energy of the roof structure vibrating in the vertical direction, and absorbs earthquake energy, thereby reducing the vibration of the roof structure.

[0009] The vibration damping structure for a roof frame according to a second aspect is the vibration damping structure for a roof frame according to the first aspect, characterized in that the support member is a seismic isolation device.

[0010] According to the above aspect, the base end of the protruding member is supported by the seismic isolation device so that the base end of the protruding member can swing. This provides a seismic isolation effect by supporting the roof structure with low rigidity in the horizontal direction, thereby suppressing the transmission of earthquake vibrations to the roof structure.

[0011] The vibration-damping structure for a roof structure of the third aspect is characterized in that, in the vibration-damping structure for a roof structure described in the first aspect, the roof structure is dome-shaped and the protruding member is a tension ring attached to the outer periphery of the roof structure.

[0012] According to the above-mentioned aspect, the tip of the tension ring vibrates in the vertical direction in response to the vertical vibration of the dome-shaped roof structure, and the vibration damper expands and contracts in response to the vertical vibration of the tip of the tension ring. In this way, by using the tension ring, it is possible to reduce the number of parts compared to the case where a dedicated member that vibrates in the vertical direction in response to the vertical vibration of the roof structure is provided.

[0013] The vibration-control structure for a roof frame of the fourth aspect is characterized in that, in the vibration-control structure for a roof frame described in the first aspect, it is provided with a tilt suppression member having one end attached to the vibration-control damper extending in the vertical direction and the other end attached to the protruding member, and suppressing the vibration-control damper from tilting in the vertical direction.

[0014] According to the above aspect, the tilt suppression member suppresses the tilt of the vibration damper, which allows the vibration damper to exert a damping force and absorb vibration energy more effectively than in a case where the vibration damper is tilted in the up-down direction. Effect of the Invention

[0015] According to the present disclosure, the vibration of the roof structure can be reduced by absorbing the vibration energy of the roof structure vibrating in the vertical direction. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a structure equipped with a vibration control structure for a roof frame according to a first embodiment of the present disclosure. FIG. [Diagram 2] 1 is a cross-sectional view showing a structure equipped with a vibration control structure for a roof frame according to a first embodiment of the present disclosure. [Diagram 3] FIG. 2 is an enlarged view showing a vibration damping structure for a roof frame according to the first embodiment of the present disclosure. [Figure 4] 1 is a plan view showing a vibration damper and a tilt suppression member provided in a vibration control structure for a roof frame according to a first embodiment of the present disclosure. FIG. [Diagram 5] 5A and 5B are state diagrams showing a state in which a tension ring vibrates in the vibration damping structure for a roof frame according to the first embodiment of the present disclosure. [Figure 6] 5A and 5B are enlarged views showing a state in which a tension ring vibrates in the vibration damping structure for a roof frame according to the first embodiment of the present disclosure. [Figure 7] 13 is a diagram showing a vibration damper and a tilt suppression member provided in a vibration control structure for a roof frame according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] First Embodiment An example of a vibration control structure for a roof frame according to the first embodiment of the present disclosure will be described with reference to Figures 1 to 6. Arrow H shown in each figure indicates the up-down direction, i.e., the vertical direction, arrow W shown in each figure is perpendicular to arrow H and also indicates the horizontal direction, and arrow D shown in each figure is perpendicular to arrows H and W and also indicates the horizontal direction.

[0018] (Overall structure) A structure 100 equipped with a vibration-damping structure 10 for a roof frame (hereinafter simply referred to as "vibration-damping structure 10") comprises a roof frame 20 and a foundation 22, as shown in Figures 1 and 2. Furthermore, as shown in Figure 3, the structure 100 comprises a tension ring 30 which constitutes the vibration-damping structure 10 and is attached to the outer periphery of the roof frame 20, and a seismic isolation device 34 which constitutes the vibration-damping structure 10 and supports the base end of the tension ring 30. The structure 100 also comprises a vibration-damping damper 40 which constitutes the vibration-damping structure 10, a support member 50 which constitutes the vibration-damping structure 10 and supports the vibration-damping damper 40, and an inclination suppression member 44 which constitutes the vibration-damping structure 10 and suppresses inclination of the vibration-damping damper 40.

[0019] In this manner, the vibration control structure 10 is configured to include the roof frame 20, the tension ring 30, the seismic isolation device 34, the vibration damper 40, the support member 50, and the tilt suppression member 44.

[0020] [Roof frame 20, foundation 22] The roof structure 20 is dome-shaped as shown in Fig. 1, and the cross section of the roof structure 20 is arc-shaped with a convex central portion as shown in Fig. 2. The roof structure 20 is constructed using a truss structure.

[0021] Further, the foundation 22 is formed with an upward surface 22a that faces the outer periphery of the roof frame 20 in the vertical direction.

[0022] [Tension Ring 30] 1 and 2, the tension ring 30 is an annular member attached to the outer periphery of the roof frame 20 so as to surround the roof frame 20, and protrudes laterally from the outer periphery of the roof frame 20. The tension ring 30 is constructed using a truss structure. The tension ring 30 is an example of a protruding member.

[0023] As a result, the tension ring 30 is adapted to handle thrust forces occurring on the outer periphery of the roof frame 20 (forces that cause the outer periphery of the roof frame 20 to expand laterally).

[0024] [Seismic isolation device 34] 3, the seismic isolation device 34 is fixed to the upward surface 22a of the foundation 22 and supports the base end of the tension ring 30. A plurality of seismic isolation devices 34 are provided at intervals so as to surround the roof frame 20 when viewed from above. The seismic isolation device 34 is an example of a support member.

[0025] The seismic isolation device 34 includes an upper flange plate 34a, a lower flange plate 34b, a laminated rubber 34c sandwiched between the upper flange plate 34a and the lower flange plate 34b, and a rocking mechanism (not shown). The lower flange plate 34b is fixed to the upward surface 22a of the foundation 22. The rocking mechanism (not shown) is provided between the upper flange plate 34a and the base end of the tension ring 30. As the rocking mechanism, for example, a pin mechanism or a ball seat mechanism provided in the upper portion of the seismic isolation device 34 is used.

[0026] In this configuration, when the roof frame 20 vibrates in the vertical direction due to an earthquake or the like, as shown in Fig. 2, the rocking mechanism of the seismic isolation device 34 is activated, and the tip of the tension ring 30 rocks in the vertical direction around the base end, as shown in Fig. 3. Specifically, when the roof frame 20 moves upward, the tip of the tension ring 30 rocks around the base end and moves downward, as shown by the two-dot chain line in Fig. 3. On the other hand, when the roof frame 20 moves downward, the tip of the tension ring 30 rocks around the base end and moves upward, as shown by the solid line in Fig. 3.

[0027] [Vibration damper 40, tilt suppression member 44, support member 50] 3, the vibration dampers 40 are disposed so as to extend in the vertical direction, and their upper ends are attached to the leading ends of the tension rings 30. Specifically, the upper ends of the vibration dampers 40 are attached to the lower chord members 30a of the tension rings 30. A plurality of vibration dampers 40 are provided at intervals so as to surround the seismic isolation device 34 when viewed from above.

[0028] Furthermore, a tilt suppression member 44 is provided to suppress tilting of the vibration damper 40 arranged to extend in the vertical direction.

[0029] 3 and 4, the tilt suppression member 44 includes four angle members 44a that are inclined in the vertical direction and that are provided so as to surround the vibration damper 40 when viewed from above, and an annular member 44b to which the lower ends of the angle members 44a are attached and into which the vibration damper 40 is inserted. The upper end of the vibration damper 40 is an example of one end of the vibration damper 40, and the lower end of the vibration damper 40 is an example of the other end of the vibration damper 40.

[0030] The annular member 44b is disposed so as to surround a portion of the cylinder 40a of the vibration damper 40, with a gap provided between the annular member 44b and the cylinder 40a. An elastically deformable fixing material (not shown) is filled into this gap, thereby fixing the annular member 44b to the cylinder 40a of the vibration damper 40. The upper end of the angle member 44a is attached to the lower chord member 30a of the tension ring 30.

[0031] 3, the support member 50 is disposed so as to be sandwiched between the lower end of the vibration damper 40 and the upward surface 22a of the foundation 22. The support member 50 is an example of another support member.

[0032] This support member 50 includes a rail material 50a extending laterally with the tension ring 30 protruding from the roof structure 20, a block material 50b that meshes with the rail material 50a and is movable relative to the rail material 50a, and a support plate 50c to whose underside the block material 50b is attached.

[0033] The rail material 50a is attached to the upward surface 22a of the foundation 22, and the lower end of the vibration damper 40 is attached to the upper surface of the support plate 50c.

[0034] In this configuration, when the roof frame 20 moves upward due to an earthquake or the like, the tip of the tension ring 30 moves downward as shown by the two-dot chain line in Fig. 3. On the other hand, when the roof frame 20 moves downward, the tip of the tension ring 30 moves upward as shown by the solid line in Fig. 3.

[0035] When the tip of the tension ring 30 vibrates in the vertical direction, the tip of the tension ring 30 moves back and forth in the horizontal direction, as shown in Figures 5 and 6. In other words, the tip of the tension ring 30 moves back and forth in the horizontal direction in conjunction with the vertical movement. In addition to this horizontal movement, the roof frame 20 is supported by the seismic isolation device 34, which has low horizontal rigidity, so that it is largely displaced in the horizontal direction during an earthquake.

[0036] As the tip of the tension ring 30 vibrates in the vertical direction, the vibration damper 40 expands and contracts to absorb the vibration energy, reducing the vertical vibration of the tip of the tension ring 30. Furthermore, as the vertical vibration of the tip of the tension ring 30 is reduced, the vertical vibration of the roof structure 20 is reduced. In other words, the vibration damper 40 indirectly absorbs the vibration energy of the roof structure 20 vibrating in the vertical direction and absorbs earthquake energy, thereby reducing the vibration of the roof structure 20.

[0037] Furthermore, as the tip of the tension ring 30 moves laterally, the vibration damper 40 supported by the support member 50 moves laterally. Here, the inclination suppression member 44 suppresses the inclination of the vibration damper 40, so that the vibration damper 40 moves laterally while maintaining a posture extending in the vertical direction. Specifically, the block material 50b of the support plate 50c moves along the rail material 50a, so that the vibration damper 40 moves laterally.

[0038] (summary) As described above, an earthquake or the like causes the roof structure 20 to vibrate in the vertical direction, and the tip of the tension ring 30 vibrates in the vertical direction in response to the vertical direction of the roof structure 20. In the vibration control structure 10, the vibration control damper 40 expands and contracts in response to the vertical vibration of the tip of the tension ring 30 to absorb the vibration energy. This reduces the vertical vibration of the tip of the tension ring 30. Furthermore, the reduction in the vertical vibration of the tip of the tension ring 30 also reduces the vertical vibration of the roof structure 20. In this way, in the vibration control structure 10, the vibration control damper 40 indirectly absorbs the vibration energy of the roof structure 20 vibrating in the vertical direction, and absorbs the earthquake energy, thereby reducing the vibration of the roof structure 20.

[0039] In the vibration control structure 10, the seismic isolation device 34 supports the base end of the tension ring 30 in a swingable manner. This provides a seismic isolation effect by supporting the roof frame 20 with low rigidity in the horizontal direction, and makes it possible to suppress the transmission of earthquake vibrations to the roof frame 20.

[0040] Furthermore, in the vibration control structure 10, the tip of the tension ring 30 vibrates vertically in response to the vertical vibration of the roof frame 20, and the vibration control damper 40 expands and contracts in response to the vertical vibration of the tip of the tension ring 30. In this way, by using the tension ring 30, the number of parts can be reduced compared to the case where a dedicated member that vibrates vertically in response to the vertical vibration of the roof frame 20 is provided.

[0041] Moreover, in the vibration control structure 10, the tilt suppression member 44 suppresses the tilt of the vibration damper 40. This allows the vibration damper to exert a damping force and absorb vibration energy more effectively than in a case where the vibration damper 40 is tilted in the up-down direction.

[0042] <Second embodiment> An example of a vibration control structure for a roof frame according to a second embodiment of the present disclosure will be described with reference to Fig. 7. Note that, regarding the second embodiment, differences from the first embodiment will be mainly described.

[0043] The tilt suppression member 144 provided in the vibration control structure 110 for a roof frame according to the second embodiment (hereinafter simply referred to as the "vibration control structure 110") includes a pipe member 146 into which the upper portion of the vibration damper 40 is inserted, as shown in Fig. 7. The upper end of this pipe member 146 is attached to the lower chord member 30a of the tension ring 30.

[0044] Although the present disclosure has been described in detail with respect to a specific embodiment, it is clear to those skilled in the art that the present disclosure is not limited to the embodiment, and various other embodiments are possible within the scope of the present disclosure. For example, in the above embodiment, a dome-shaped structure is used as the roof structure 20, but any large-span roof structure having a long span length may be used.

[0045] In the above embodiment, the support member 50 is described as a rolling bearing, but it may be a sliding bearing or the like that can withstand a vertically upward force.

[0046] Also, although not specifically described in the above embodiment, the protruding member that is attached to the outer periphery of the roof structure 20 and protrudes laterally may be the entire tension ring 30 or may be a part of the tension ring 30. [Explanation of symbols]

[0047] 10 Vibration control structure of roof structure 20 Roof frame 22 Basics 30 Tension ring (an example of a protruding member) 34 Seismic isolation device (an example of a support member) 40 Vibration damper 44 Tilt control member 50 Support member (an example of another support member) 110 Vibration control structure for roof structure 144 Tilt control member

Claims

1. The roof structure and A protruding member attached to an outer periphery of the roof structure and protruding laterally; A support member fixed to a foundation and swingably supporting a base end of the protruding member; a vibration damper having one end attached to the tip end of the protruding member, the vibration damper reducing vertical vibration of the tip end and disposed to extend in the vertical direction; Another support member that supports the other end of the vibration damper so as to be movable laterally relative to the foundation; A vibration control structure for a roof structure.

2. The support member is a seismic isolation device. A vibration damping structure for a roof structure according to claim 1.

3. The roof structure is dome-shaped, The protruding member is a tension ring attached to the outer periphery of the roof structure. A vibration damping structure for a roof structure according to claim 1.

4. a tilt suppression member having one end attached to the vibration damper extending in the vertical direction and the other end attached to the protruding member, the tilt suppression member suppressing the vibration damper from tilting in the vertical direction; A vibration damping structure for a roof structure according to claim 1.

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