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中文摘要：
为了满足近海高烈度区隔震桥梁支座大吨位、大位移和耐久性需求,开发出多球面滑动摩擦隔震支座,阐明了这种隔震支座的构造特点、工作机理和滑动机制,建立了其力-位移关系非线性恢复力模型,进而给出了各滑动面摩擦因数相等时支座的力-位移关系式,并对该支座的力学性能进行了试验研究,对其各摩擦面的滑动顺序机制和非线性恢复力模型进行了试验确认。结果表明：理论分析的支座滑动先后顺序与试验过程中观察到的完全一致,支座试验所得力-位移滞回曲线和理论分析结果十分吻合;此多球面滑动摩擦隔震支座具有良好的耗能能力和足够的水平位移,而且在不同强度的外部激励下表现出刚度和阻尼的自适应性能,适用于多水准地震动下基于性能的隔震桥梁抗震设计。
英文摘要：
In order to meet the requirement of offshore bridges in highly seismic regions for isolation bearings with large-tonnage load capacity, displacement and durability, a novel multi- spherical sliding friction isolation bearing was developed and its constructional characteristics, working mechanism and sliding mechanism were introduced. A nonlinear restoring model of its force-displacement relationship and the formulas of the relationship with identical coefficient of all friction surfaces were established. A mechanical performance experiment of the bearing was carried out and its sliding sequence of all friction surfaces and its nonlinear restoring model were tested. The results indicate that sliding sequence in theoretical analysis is identical to that in experimental observation and the force-displacement relationships in theoretical analysis and experimental observation are consistent, thus indicating the bearing is of high dissipative energy capacity and enough displacement in earthquakes. The smart stiffness and damping behavior of the bearing under various external intense stimulations is applicable to the performance-based seismic design of bridges at the multiple levels of ground shaking.
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