空间非对称框架结构偏心扭转地震反应的控制
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摘要
首先根据空间非对称框架结构的特点以及实施扭转振动控制的要求 ,采用当前发展较为成熟的 RB(叠层橡胶支座 )和 LRB(叠层铅芯橡胶支座 )作为调控隔震元件 ,建立了一种空间杆系—层间计算模型。作者开发了多维地震动输入下的三维线性、非线性动力时程分析程序 ,对一典型多层非对称框架结构采用传统非隔震和基础隔震方案 ,水平输入地震波 ,进行了一系列的平动—扭转耦联地震反应对比分析 .结果表明 ,通过设置隔震支座 ,可有效控制非对称建筑结构在地震激励下的偏心扭转效应
In terms of the character of spatial asymmetric RC frame structure and the requirement of controlling torsion vibration, firstly a 3D member-story model is established with taking Rubber Bearing(RB) and Lead Rubber Bearing(LRB) as isolators. Based on the model, the authors develop a 3D linear and nonlinear dynamic time-history analysis program of frame structure under the multi-dimension ground motions. One typical multistory asymmetric RC frame structure subject to horizontal earthquake waves serves studying of the object, adoption of conventional fixed-base and RB or LRB base-isolated methods respectively. Then, a series of translation-torsion coupling seismic responses are analyzed comparatively. Finally, the calculated results show, that through making use of the base-isolated technique, the eccentric torsion effect of multistory asymmetric frame structure can be controlled effectively.
In terms of the character of spatial asymmetric RC frame structure and the requirement of controlling torsion vibration, firstly a 3D member-story model is established with taking Rubber Bearing(RB) and Lead Rubber Bearing(LRB) as isolators. Based on the model, the authors develop a 3D linear and nonlinear dynamic time-history analysis program of frame structure under the multi-dimension ground motions. One typical multistory asymmetric RC frame structure subject to horizontal earthquake waves serves studying of the object, adoption of conventional fixed-base and RB or LRB base-isolated methods respectively. Then, a series of translation-torsion coupling seismic responses are analyzed comparatively. Finally, the calculated results show, that through making use of the base-isolated technique, the eccentric torsion effect of multistory asymmetric frame structure can be controlled effectively.
引文
[1] [日]武田寿一著.纪晓惠,陈良,鄢宁译.建筑物隔震防振与控振[M].北京:中国建筑工业出版社,1997.
[2] 邬瑞锋,蔡贤辉,曲乃泗.多层及高层房屋扭转耦联弹塑性地震反应的研究[J].大连理工大学学报,1999,39(4):471-477.
[3] 李忠献,万家,姜忻良.高层建筑结构扭转耦合地震反应阻尼器控制试验研究[J].振动工程学报,1999,12(2):262-266.
[4] 江宜城,唐家祥,李媛萍.多层框架隔震结构的地震扭转反应分析[J].工程抗震,2000,(2):12-14.
[5] NagarajaiahS,ReinhornA,ConstantinaM C.TorsionalCoupling inSlidingBase-isolatedStructures[J].JournalofStructuralEngineering,1993,119(1):130-149.
[6] JangidR S,DattaT K .NonlinearResponse ofTorsionallyCoupledBasedIsolatedStructure[J].Journal ofStructuralEngineering,1994,120(1):1-22.
[7] 日本免震构造协会.叶列平译.隔震结构入门[M].北京:科学出版社,1998.
[8] SkinnerR I,RobinsonW H,McVeryC H.AnIntroduction toSeismicIsolation[M].JohnWiley andSonsLtd.,1993.
[9] 张俊发,刘云贺,王克成.设置铅芯橡胶支座梁式渡槽的地震响应分析[J].水利学报,1999,(1):50-54.
[2] 邬瑞锋,蔡贤辉,曲乃泗.多层及高层房屋扭转耦联弹塑性地震反应的研究[J].大连理工大学学报,1999,39(4):471-477.
[3] 李忠献,万家,姜忻良.高层建筑结构扭转耦合地震反应阻尼器控制试验研究[J].振动工程学报,1999,12(2):262-266.
[4] 江宜城,唐家祥,李媛萍.多层框架隔震结构的地震扭转反应分析[J].工程抗震,2000,(2):12-14.
[5] NagarajaiahS,ReinhornA,ConstantinaM C.TorsionalCoupling inSlidingBase-isolatedStructures[J].JournalofStructuralEngineering,1993,119(1):130-149.
[6] JangidR S,DattaT K .NonlinearResponse ofTorsionallyCoupledBasedIsolatedStructure[J].Journal ofStructuralEngineering,1994,120(1):1-22.
[7] 日本免震构造协会.叶列平译.隔震结构入门[M].北京:科学出版社,1998.
[8] SkinnerR I,RobinsonW H,McVeryC H.AnIntroduction toSeismicIsolation[M].JohnWiley andSonsLtd.,1993.
[9] 张俊发,刘云贺,王克成.设置铅芯橡胶支座梁式渡槽的地震响应分析[J].水利学报,1999,(1):50-54.
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