Mechanical Behavior of Laminated Rubber Isolation Bearing with Buckling Steel Plate

다국어 초록 (Multilingual Abstract)

To improve the ability of disaster prevention and mitigation of bridges and realize the seismic resilience of traffi c, 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 stiff ness of the steel plates before and after buckling had bilinear characteristics. The stiff ness of the steel plate, the stiff ness 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 stiff ness, the stiff ness 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 stiff ness, and equivalent viscous damping coeffi cient, 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 threestage characteristics, which can meet the performance requirements of bridge earthquake prevention and disaster reduction.

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