JP-7856488-B2 - Vibration damping structure and design method for vibration damping structure

JP7856488B2JP 7856488 B2JP7856488 B2JP 7856488B2JP-7856488-B2

Inventors

西谷隆之
兼光知巳
牛坂伸也
村瀬充
遠藤広大

Assignees

清水建設株式会社

Dates

Publication Date: 20260511
Application Date: 20220531

Claims (3)

The lower structure and A roof section connected to and supported by the aforementioned substructure, A first vibration damping device is provided at the connection between the lower structure and the roof, A spring device is provided at the connection between the lower structure and the roof, It has a second vibration damping device provided in the lower structure, A vibration damping structure in which the first vibration damping device, the spring device, and the roof section function as mass dampers, and the first vibration damping device, the spring device, and the second vibration damping device are set to synchronize the lower structure section and the roof section based on the fixed-point theory.
The lower structure and A roof section connected to and supported by the aforementioned substructure, A first vibration damping device is provided at the connection between the lower structure and the roof, A spring device is provided at the connection between the lower structure and the roof, It has a second vibration damping device provided in the lower structure, The aforementioned substructure has multiple layers, A vibration damping structure in which some of the layers of the aforementioned plurality of layers have a more flexible structure than the other layers, and the second vibration damping device is provided in the aforementioned some of the layers.
The lower structure and A roof section connected to and supported by the aforementioned substructure, A first vibration damping device is provided at the connection between the lower structure and the roof, A spring device is provided at the connection between the lower structure and the roof, It has a second vibration damping device provided in the lower structure, The first vibration damping device, the spring device, and the roof section function as mass dampers, and the first vibration damping device, the spring device, and the second vibration damping device are set to synchronize with the lower structure and the roof section based on the fixed-point theory. A method for designing a vibration-damping structure in a building comprising the aforementioned substructure and roof, without assuming a rigid floor for the building.

Description

The present invention relates to a vibration damping structure and a method for designing a vibration damping structure . In buildings that construct large spaces such as stadiums, arenas, and halls where various sports and events are held, there are known examples of buildings where the substructure supports the roof over a large span (see, for example, Patent Document 1). Japanese Patent Publication No. 2019-073925 This is a schematic diagram showing an example of a vibration damping structure according to an embodiment of the present invention.This is a diagram showing the analysis model.This figure shows the input seismic motion.This is a graph showing the analysis results. The vibration damping structure according to an embodiment of the present invention will be described below with reference to Figure 1. The vibration damping structure 1 according to this embodiment, shown in Figure 1, is used in buildings 11 that construct large spaces such as stadiums, halls, and arenas with roofs. The vibration damping structure 1 comprises a substructure 2, a roof 3, a first vibration damping device 5 provided at the connection 4 between the substructure 2 and the roof 3, a spring device 6 provided at the connection 4 between the substructure 2 and the roof 3, and a second vibration damping device 7 provided on the substructure 2. The substructure 2 is supported by the ground. The substructure 2 has columns and beams. The substructure 2 has multiple floors (levels). If the building 11 is a stadium, seating for spectators is provided in the substructure 2. The second vibration control device 7 is composed of, for example, oil dampers arranged in a bracing type, shear link type, or intermediate column type, or viscous walls, etc. The substructure 2 of this embodiment is a so-called first-story concentrated seismic damping structure, in which the first floor is made more flexible than the floors above the second floor, and a second seismic damping device 7 is installed on the first floor. The first-story concentrated seismic damping structure is a structure that concentrates deformation caused by earthquakes on a specific floor and absorbs seismic energy on that floor. The building 11 shown in Figure 1 has four floors. The roof section 3 has its edges, when viewed from above or below in a plan view, connected to the upper end of the substructure section 2. The roof section 3 is supported by the substructure section 2 over a large span. The first vibration damping device 5 is, for example, an oil damper. The spring device 6 is constructed by appropriately combining disc springs, coil springs, or laminated rubber bearings. For example, the spring device 6 may use horizontal springs that can support vertical loads, such as laminated rubber bearings, or it may use springs that only provide horizontal restoring force, such as disc springs or coil springs, in combination with bearings that support vertical loads (sliding bearings or rolling bearings). The first vibration damping device 5 and the spring device 6 are installed in parallel at the connection point 4 between the substructure 2 and the roof section 3. Furthermore, in order to prevent the roof section 3 from constantly shaking during strong winds, which occur a few times a year, a wind-resistant locking device or a sliding bearing with a coefficient of friction whose sliding load is greater than the wind load may be installed in parallel with the spring device 6 and the first vibration damping device 5. The first vibration damping device 5, the spring device 6, and the second vibration damping device 7 are set up so that the lower structure 2 and the roof 3 are synchronized based on the fixed-point theory. Next, the operation and effects of the vibration damping structure according to this embodiment will be described. In the vibration damping structure 1 according to this embodiment, a spring device 6 is provided at the connection point 4 between the lower structure 2 and the roof 3, so that the spring device 6 can absorb the deformation that occurs when the roof 3 expands or contracts due to temperature changes. Therefore, the stress generated in the columns and beams of the lower structure 2 due to the contraction of the roof 3 due to temperature changes can be reduced. In the vibration damping structure according to this embodiment, the first vibration damping device 5, the spring device 6, and the roof section 3 function as mass dampers, and the first vibration damping device 5, the spring device 6, and the second vibration damping device 7 are set to synchronize with the substructure section 2 and the roof section 3 based on the fixed-point theory. As a result, the response of the entire building 11, including the substructure section 2 and the roof section 3, can be reduced. Consequently, seismic resistance can be improved without installing a large number of vibration damping devices on the substructure section 2. Compared to conventional vibration dampi