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Mechanical Properties of Thick Rubber Bearings Used in Over-Track Buildings
As the construction of over-track buildings has increased, the need for reducing vertical vibrations caused by subways has emerged. Thick rubber bearings (TRBs) can provide both horizontal and vertical isolation. However, there is still uncertainty about the mechanical properties of TRBs which causes a difficulty in evaluating their performance. In this study, a full-scale TRB with a low first shape factor was designed, manufactured, and then tested under compressive, tensile, and shear loads. Its vertical and horizontal characteristics were identified through experiments. The effects of the vertical pressure, shear strain, and loading frequency on the mechanical behavior of the TRB were explored. Based on the experimentally determined properties, simplified multiple-degree-of-freedom systems were established to evaluate the performance of the TRB in terms of mitigating the vertical vibrations caused by the subway. Under a subway-induced excitation, the acceleration responses of the isolated system using TRBs were substantially reduced. Therefore, TRBs could be used to mitigate vertical vibrations and improve the seismic safety of over-track buildings.
Mechanical Properties of Thick Rubber Bearings Used in Over-Track Buildings
As the construction of over-track buildings has increased, the need for reducing vertical vibrations caused by subways has emerged. Thick rubber bearings (TRBs) can provide both horizontal and vertical isolation. However, there is still uncertainty about the mechanical properties of TRBs which causes a difficulty in evaluating their performance. In this study, a full-scale TRB with a low first shape factor was designed, manufactured, and then tested under compressive, tensile, and shear loads. Its vertical and horizontal characteristics were identified through experiments. The effects of the vertical pressure, shear strain, and loading frequency on the mechanical behavior of the TRB were explored. Based on the experimentally determined properties, simplified multiple-degree-of-freedom systems were established to evaluate the performance of the TRB in terms of mitigating the vertical vibrations caused by the subway. Under a subway-induced excitation, the acceleration responses of the isolated system using TRBs were substantially reduced. Therefore, TRBs could be used to mitigate vertical vibrations and improve the seismic safety of over-track buildings.
Mechanical Properties of Thick Rubber Bearings Used in Over-Track Buildings
Lecture Notes in Civil Engineering
Cimellaro, Gian Paolo (editor) / Zhou, Ying (author) / Zhang, Zengde (author) / Vassiliou, Michalis F. (author)
World Conference on Seismic Isolation ; 2022 ; Turin, Italy
Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures ; Chapter: 12 ; 179-189
2023-01-07
11 pages
Article/Chapter (Book)
Electronic Resource
English
Thick rubber bearings , Vertical characteristics , Horizontal characteristics , Over-track buildings , Vibration control Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Fire Science, Hazard Control, Building Safety , Building Construction and Design , Cultural Heritage
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