平扭耦联隔震体系振动台试验研究
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摘要
为了建立平扭耦联非规则隔震体系的隔震层设计理论和方法,本文通过振动台模拟试验来研究该体系的动力特性和反应。试验中,采用1个3层两跨钢框架,通过调整上部结构负重块位置及下部隔震垫位置,进行不同偏心工况下的平扭耦联隔震体系地震模拟振动台试验。试验结果表明:用本文模型组装方法,实现结构模型的平扭耦联,简单、适用、有效;采取基础隔震可显著降低上部结构扭转反应;调整隔震层刚心使其与上部质心位置接近可进一步降低偏心隔震结构扭转反应。
In order to establish the isolation layer design theory and methods of lateral-torsional coupling with the irregular isolation system,the system dynamic characteristics and response are analyzed by using the simulation of shaking table tests.In the experiment,using a 3-storey,2-span steel frame and by changing the location of upper load and the isolation bearings,a series of shaking table tests of the lateral-torsional coupling isolated system under different eccentric conditions are carried out.The experiment shows that: based on the test process and results,it is easy,applicable and effective to fulfil the lateral-torsional coupling of the model by using the assembly method given in this paper;the torsinal response of the eccentric structure can be lowered significantly using isolation bearings;the torsinal response of the eccentric structure can be lowered further by making the centre of stiffness of the isolation layer close to the mass centre of the upper structure.
In order to establish the isolation layer design theory and methods of lateral-torsional coupling with the irregular isolation system,the system dynamic characteristics and response are analyzed by using the simulation of shaking table tests.In the experiment,using a 3-storey,2-span steel frame and by changing the location of upper load and the isolation bearings,a series of shaking table tests of the lateral-torsional coupling isolated system under different eccentric conditions are carried out.The experiment shows that: based on the test process and results,it is easy,applicable and effective to fulfil the lateral-torsional coupling of the model by using the assembly method given in this paper;the torsinal response of the eccentric structure can be lowered significantly using isolation bearings;the torsinal response of the eccentric structure can be lowered further by making the centre of stiffness of the isolation layer close to the mass centre of the upper structure.
引文
[1]李向真.平转耦联隔震体系的简化模型及有关参数变化的计算分析[J].地震工程与工程振动,2005,(3):163～166Li Xiang-zhen.Simplified model of lateral-torsionalcoupling isolated system and the parameters of thecalculation and analysis[J].Earthquake Engineeringand Engineering Vibration,2005,(3):163～166(inChinese)
[2]向伟明,李向真.考虑扭转耦联隔震结构简化体系的地震时程反应分析及有关参数的影响[J].工程抗震与加固改造,2004,(6):15～19Xiang Wei-ming,Li Xiang-zhen.Time-history ResponseAnalysis for Simplified System about Translation-torsionCoupling Isolated Structure[J].Earthquake ResistantEngineering and Retrofitting,2004,(6):15～19
[3]武田寿一.建筑物隔震、防振与控制[M].北京:中国建筑工业出版社,1997,4Wu Tian Shou yi.Building Isolation,Vibration andControl[M].Beijing:China Building Industry Press,1997,4(in Chinese)
[2]向伟明,李向真.考虑扭转耦联隔震结构简化体系的地震时程反应分析及有关参数的影响[J].工程抗震与加固改造,2004,(6):15～19Xiang Wei-ming,Li Xiang-zhen.Time-history ResponseAnalysis for Simplified System about Translation-torsionCoupling Isolated Structure[J].Earthquake ResistantEngineering and Retrofitting,2004,(6):15～19
[3]武田寿一.建筑物隔震、防振与控制[M].北京:中国建筑工业出版社,1997,4Wu Tian Shou yi.Building Isolation,Vibration andControl[M].Beijing:China Building Industry Press,1997,4(in Chinese)
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