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多球面滑动摩擦隔震支座计算模型及其试验确认

, PP. 82-88

Keywords: 桥梁工程,滑动摩擦隔震支座,试验研究,恢复力模型

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Abstract:

?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。

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