考虑竖向地震作用的LRB隔震结构优化设计
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摘要
为了研究竖向地震作用对LRB隔震结构的影响,并改善其隔震效果,建立了耦合地震作用下LRB隔震结构的地震反应分析模型并推导出运动微分方程.以7层LRB隔震结构为例进行地震反应分析,研究结果表明当考虑竖向地震作用时,LRB隔震结构仍具有良好的隔震效果,但地震反应有不同程度的增加,且其增量随着竖向地震作用的增加而增加.建立LRB隔震装置的参数优化设计模型,采用IHGA程序对结构的进行优化设计.结果表明,LRB隔震结构在各种工况下的各项地震反应均得到更好地控制.
In order to study the influence of coupling earthquake in vertical direction on base-isolated structure with lead rubber bearing(LRB),a dynamic analysis model for the base-isolated structure with LRB under coupling earthquake was set up,and the kinetic differential function was presented accordingly.Taking a 7-story base-isolated structure with LRB for example,it is showed that the base-isolated structure with LRB has a good controlled effect when the action of earthquake in vertical direction is considered.However,the seismic responses of base-isolated structure with LRB increase in different degrees under the incremental action of earthquake in vertical direction.An optimal model for the base-isolated structure with LRB was set up with IHGA.It is indicated that various earthquake responses of base-isolated structure with LRB under various loading conditions can be better controlled.
In order to study the influence of coupling earthquake in vertical direction on base-isolated structure with lead rubber bearing(LRB),a dynamic analysis model for the base-isolated structure with LRB under coupling earthquake was set up,and the kinetic differential function was presented accordingly.Taking a 7-story base-isolated structure with LRB for example,it is showed that the base-isolated structure with LRB has a good controlled effect when the action of earthquake in vertical direction is considered.However,the seismic responses of base-isolated structure with LRB increase in different degrees under the incremental action of earthquake in vertical direction.An optimal model for the base-isolated structure with LRB was set up with IHGA.It is indicated that various earthquake responses of base-isolated structure with LRB under various loading conditions can be better controlled.
引文
[1]张延年,刘剑平,李艺.双向耦合地震作用下的混合控制结构研究[J].沈阳建筑大学学报(自然科学版),2006,22(1):1-5.
[2]张延年,刘剑平,刘斌.多向地震耦合作用下MR阻尼结构的地震反应分析[J].东北大学学报(自然科学版),2005,26(9):897-900.
[3]冼巧玲,周福霖,王伟.橡胶垫隔震框架结构试验研究[J].世界地震工程,1996,5(2):23-28.
[4]李树信,姚谦峰.多层砖混结构基底隔震的应用研究[J].西安冶金建筑学院学报,1991,23(4):411-418.
[5]张永山,周福霖,刘文光.橡胶垫隔震结构分析软件包的研制[J].华南建设学院西院学报,2000,8(2):35-41.
[6]赵西安.高层建筑结构在竖向地震作用下的时程分析[J].建筑结构学报,1994,15(3):2-10.
[7]YAN W,HONG W S,SUN Y K.A hybrid genetic al-gorithm based on mutative scale chaos optimizationstrategy[J].Journal of University of Science andTechnology Beijing,2002,9(6):470-473.
[8]张延年,刘斌,董锦坤.改进遗传算法在建筑结构优化设计中的应用[J].东北大学学报(自然科学版),2004,25(7):692-694.
[2]张延年,刘剑平,刘斌.多向地震耦合作用下MR阻尼结构的地震反应分析[J].东北大学学报(自然科学版),2005,26(9):897-900.
[3]冼巧玲,周福霖,王伟.橡胶垫隔震框架结构试验研究[J].世界地震工程,1996,5(2):23-28.
[4]李树信,姚谦峰.多层砖混结构基底隔震的应用研究[J].西安冶金建筑学院学报,1991,23(4):411-418.
[5]张永山,周福霖,刘文光.橡胶垫隔震结构分析软件包的研制[J].华南建设学院西院学报,2000,8(2):35-41.
[6]赵西安.高层建筑结构在竖向地震作用下的时程分析[J].建筑结构学报,1994,15(3):2-10.
[7]YAN W,HONG W S,SUN Y K.A hybrid genetic al-gorithm based on mutative scale chaos optimizationstrategy[J].Journal of University of Science andTechnology Beijing,2002,9(6):470-473.
[8]张延年,刘斌,董锦坤.改进遗传算法在建筑结构优化设计中的应用[J].东北大学学报(自然科学版),2004,25(7):692-694.
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