Abstract
To improve the ability of disaster prevention and mitigation of bridges and realize the seismic resilience of traffic, this paper combines the elastic buckling characteristics of steel plates with the mechanical properties of laminated rubber bearings based on the principle of seismic isolation, and proposes a steel plate-laminated rubber composite seismic isolation bearing. The mechanical properties of steel plates were analyzed by ABAQUS software, and it was found that the shear stiffness of the steel plates before and after buckling had bilinear characteristics. The stiffness of the steel plate, the stiffness ratio before and after buckling, and the critical buckling load decreased with the increase of height-width ratio. According to the numerical regression, the precise formulas of the initial shear stiffness, the stiffness ratio before and after buckling, and the critical buckling load of the steel plate are proposed. Finally, by studying the seismic performance parameters of the alternative seismic isolation bearing, such as dissipation energy, shear stiffness, and equivalent viscous damping coefficient, the results show that the outer steel plate of the alternative type of bearing is in parallel with the rubber. The peripheral steel plate improves the overall energy dissipation capacity of the bearing. Under reciprocating load, the bearing exhibits three-stage characteristics, which can meet the performance requirements of bridge earthquake prevention and disaster reduction.
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Acknowledgements
The study was jointly supported by the the Xian Science and Technology Innovation Talent Service Enterprise Project (Grant No. 2020KJRC0047), the Natural Science Foundation of Shaanxi Province (Grant No. 2020JM-475) and the National Natural Science Foundation of China (Grant No. 51408453). The authors gratefully acknowledge the financial support.
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Sun, J., Zhufu, G. Mechanical Behavior of Laminated Rubber Isolation Bearing with Buckling Steel Plate. Int J Steel Struct 22, 1069–1085 (2022). https://doi.org/10.1007/s13296-022-00623-0
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DOI: https://doi.org/10.1007/s13296-022-00623-0