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铅芯橡胶支座滞回曲线的扁环现象及其恢复力模型 被引量:3
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作者 何文福 刘文光 +1 位作者 霍达 滕海文 《郑州大学学报(工学版)》 CAS 2006年第4期71-74,共4页
大量的试验数据表明,铅芯橡胶支座的滞回曲线与加载时程密切相关.目前现有的铅芯橡胶支座恢复力模型中都没有考虑加载时程基础上的应变滞回特性,针对铅芯橡胶支座的这一特性,提出了铅芯橡胶支座的“扁环”效应,根据双拐点原则建立了考... 大量的试验数据表明,铅芯橡胶支座的滞回曲线与加载时程密切相关.目前现有的铅芯橡胶支座恢复力模型中都没有考虑加载时程基础上的应变滞回特性,针对铅芯橡胶支座的这一特性,提出了铅芯橡胶支座的“扁环”效应,根据双拐点原则建立了考虑加载时程应变滞回特性的剪切弹塑性的“扁环”效应恢复力模型,并对提出的恢复力模型进行了静力试验验证.试验结果表明:作者提出的“扁环”效应能很好地描述铅芯橡胶支座加载时程的应变滞回特性,“扁环”效应恢复力模型合理、精确,适合于精确的非线性时程分析. 展开更多
关键词 橡胶支座 扁环效应 恢复力模型 加载时程
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Dynamic Crowd Loading Test on Tibetan Ancient Structures
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作者 Na Yang Ting Guo 《Journal of Civil Engineering and Architecture》 2010年第5期15-21,共7页
The field test of a typical Tibetan ancient structure instrumented with displacement and acceleration transducers was conducted to measure time histories due to crowd walking and running. The test case is introduced f... The field test of a typical Tibetan ancient structure instrumented with displacement and acceleration transducers was conducted to measure time histories due to crowd walking and running. The test case is introduced firstly. The displacement time histories are then used to analyze the dynamic property such as fundamental frequency of vertical vibration and damping ratio of the test structure, and the acceleration time histories are applied to evaluate the floor vibration serviceability. The floor interaction and comparison of human walking and running are also discussed. Some valuable conclusions are given. 展开更多
关键词 Tibetan ancient structure field test dynamic property crowd walking and running floor vibration serviceability.
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