SMA绞线-叠层橡胶复合支座结构的动力反应
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摘要
为了改进现有普通叠层橡胶支座的隔震效果,利用形状记忆合金的超弹性,将SMA绞线加入叠层橡胶支座中,形成了SMA绞线-叠层橡胶复合支座。分析了SMA绞线-叠层橡胶复合支座的工作原理,建立了其力学分析模型,并进行了应用SMA绞线-叠层橡胶复合支座的结构动力反应分析,导出了加速度衰减比Ra与位移放大比Rd的理论形式,并利用具体算例,研究了频率比和阻尼比对结构隔震效果的影响。结果表明,频率比越大,阻尼比越小,隔震效果越好。
The shape memory alloy(SMA) strands-laminate rubber bearing is developed with the addition of SMA strands to the laminate rubber bearing applying the hyperelastic behavior of SMA,for the sake of improving seismic isolation effect of the laminate rubber bearing.In this paper,the operating principle of SMA strands-laminate rubber bearing is analyzed,the mechanical model was established,the analyses of dynamic response of structure based on SMA strands-laminate rubber bearing is accomplished,the mathematical models of attenuation ratio Ra of acceleration and magnification ratio Rb of displacement are worked out and their influence on the seismic isolation is illustrated by an example.The result shows that the higher frequency ratio and the lower damping ratio,the more effective its seismic isolation is.
The shape memory alloy(SMA) strands-laminate rubber bearing is developed with the addition of SMA strands to the laminate rubber bearing applying the hyperelastic behavior of SMA,for the sake of improving seismic isolation effect of the laminate rubber bearing.In this paper,the operating principle of SMA strands-laminate rubber bearing is analyzed,the mechanical model was established,the analyses of dynamic response of structure based on SMA strands-laminate rubber bearing is accomplished,the mathematical models of attenuation ratio Ra of acceleration and magnification ratio Rb of displacement are worked out and their influence on the seismic isolation is illustrated by an example.The result shows that the higher frequency ratio and the lower damping ratio,the more effective its seismic isolation is.
引文
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[6]刘海卿.SMA绞线-叠层橡胶复合支座的研制及其隔震性能试验研究[D].天津:天津大学,2006.
[7]刘海卿,李忠献.应用SMA—叠层橡胶复合支座的建筑结构隔震[J].自然灾害学报,2006,15(3):86-90.
[8]李忠献,陈海泉,刘建涛.应用SMA—复合橡胶支座的桥梁隔震[J].地震工程与工程振动,2002,4(22):143-148.
[9]刘海卿,李忠献,陈海泉.基于SMA复合橡胶支座的建筑结构自适应隔震[J].振动工程学报,2004.8(增刊):1061-1063.
[10]刘文光,李峥嵘,周福霖,等.低硬度橡胶隔震支座基本力学性能及恢复力特性[J].地震工程与工程振动,2002(3):138-144.
[2]欧进萍.结构振动控制-主动、半主动和智能控制[M].北京:科学出版社,2003:395-416.
[3]高小旺,龚思礼,苏经宇,等.建筑抗震设计规范理解与应用[M].北京:中国建筑工业出版社,2002:334-335.
[4]王建强,王利娟.铅芯叠层橡胶支座恢复力模型研究[J].世界地震工程,2005(2):151-156.
[5]李宏男,李忠献,祁皑,等.结构振动与控制[M].北京:中国建筑工业出版社,2005:380-391.
[6]刘海卿.SMA绞线-叠层橡胶复合支座的研制及其隔震性能试验研究[D].天津:天津大学,2006.
[7]刘海卿,李忠献.应用SMA—叠层橡胶复合支座的建筑结构隔震[J].自然灾害学报,2006,15(3):86-90.
[8]李忠献,陈海泉,刘建涛.应用SMA—复合橡胶支座的桥梁隔震[J].地震工程与工程振动,2002,4(22):143-148.
[9]刘海卿,李忠献,陈海泉.基于SMA复合橡胶支座的建筑结构自适应隔震[J].振动工程学报,2004.8(增刊):1061-1063.
[10]刘文光,李峥嵘,周福霖,等.低硬度橡胶隔震支座基本力学性能及恢复力特性[J].地震工程与工程振动,2002(3):138-144.
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