复杂博物馆结构的隔震效应及地震响应分析
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摘要
对具有竖向构件不规则、楼板开洞面积大、四周悬挑梁等特征的复杂混凝土框架—钢支撑博物馆结构,采用隔震技术处理后,基于时程分析法进行了层间位移、层间剪力等的地震响应分析,隔震后结构加速度响应仅为输入的30%～60%,最大层间剪力约为非隔震的40%。还根据基底剪力和外力做功等效原则提出了复杂结构模型向简化计算模型转化的等效刚度和隔震层位移等计算式,并对博物馆隔震结构进行了地震响应分析。计算结果表明,简化分析方法的计算精度与时程分析法相近。所提简化计算方法计算简便且具有较好的分析精度,可用于复杂隔震结构地震响应的快速分析。
For a complicated base-isolated museum structure with vertical irregularity,discotinuous floor slabs and cantilever beams,time domain analysis on story drifts and story shear forces were carried on after isolation process.Results show that acceleration responses of isolated structure are just 30%~ 60%of input seismic motions and the max story shear force of isolated structure is just 40%of non-isolated.According to equivalent principles for base shear force and energy of common and simplified models,two-mass calculation method was suggested and used to calculate responses of the isolated museum structure.Results of time history analysis were consistent with the simplified analysis method.Simplified calculation method mentioned in this paper offers a quick calculation and has a certain accuracy,which can be used in fast analysis of complicated isolated structures.
For a complicated base-isolated museum structure with vertical irregularity,discotinuous floor slabs and cantilever beams,time domain analysis on story drifts and story shear forces were carried on after isolation process.Results show that acceleration responses of isolated structure are just 30%~ 60%of input seismic motions and the max story shear force of isolated structure is just 40%of non-isolated.According to equivalent principles for base shear force and energy of common and simplified models,two-mass calculation method was suggested and used to calculate responses of the isolated museum structure.Results of time history analysis were consistent with the simplified analysis method.Simplified calculation method mentioned in this paper offers a quick calculation and has a certain accuracy,which can be used in fast analysis of complicated isolated structures.
引文
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[16]Chiba Y,Satsukawa K,Kitamura H,et al.Energy balance-based seismic response prediction methods for seismic isolated buildings with rubber bearings, dampers and low friction elastic sliding bearings[J]. Journal of Structural and Construction Engineering (Transactions of AIJ),2004,575:65-72.
[2]Chung W J,Yun C B,Kim N S,et al.Shaking table and pseudodynamic tests for the evaluation of seismic performance of base-isolated structures[J].Engineering Structure,1999,21(4):365-379.
[3]日本建筑协会.隔震结构设计[M].刘文光,译.北京:地震出版社,2006. Architectural Institute of Japan.Recommendation for the design of base isolated buildings[M].Liu Wenguang Translated.Beijing:Seismological Press, 2006.(in Chinese)
[4]周锡元,阎维明,杨润林.建筑结构的工程隔震、减振消能和振动控制[J].建筑结构学报,2002,23 (2):2-12. Zhou Xiyuan,Yan Weiming,Yang Runlin.Seismic base isolation,energy dissipation and vibration control of building structures[J].Journal of Building Structures, 2002,23(2):2-12.(in Chinese)
[5]刘文光,周福霖,庄学真,等.铅芯夹层橡胶隔震垫基本力学性能研究[J].地震工程与工程振动, 1999,19(1):3-99. Liu Wenguang,Zhou Fulin,Zhuang Xuezhen,et al. Research on fundamental mechanic characteristics of lead rubber bearings[J].Earthquake Engineering and Engineering Vibration,1999,19(1 ):93-99.(in Chinese )
[6]Yang Qiaorong,Liu Wenguang,He Wenfu.Tensile stiffness and deformation model of rubber isolators in tension and tension shear states[J].Journal of Engineering Mechanics,2010,136:429-437.
[7]刘文光,庄学真,周福霖,等.中国铅芯夹层橡胶隔震支座各种相关性能和长期性能研究[J].地震工程与工程振动,2002,22(1):114-120. Liu Wenguang,Zhuang Xuezhen,Zhou Fulin,et al. Dependence and durability properties of chinese lead plug rubber bearings[J].Earthquake Engineering and Engineering Vibration,2002,22(1):114-120. (in Chinese )
[8]Liu Wenguang,He Wenfu,Yang Qiaorong.Vertical stiffness and deformation analysis models of rubber isolators in compression and compression shear states [J].Journal of Engineering Mechanics,2009,135; 945-952.
[9]刘文光,庄学真,林佳,等.夹层橡胶隔震支座长期力学性能及耐火性能试验研究[J].华南建设学院西院学报,2000,8(3):1-10. Liu Wengguang,Zhuang Xuezhen,Lin Jia,et al. Durability properties and fire resistance of plug rubber bearings[J].Journal of South China Construction University, 2000,8(3):1-10.(in Chinese)
[10]刘文光,李峥嵘,周福霖,等.低硬度橡胶隔震支座各种相关性及老化徐变特性[J].地震工程与工程振动,2002,22(6):115-121. Liu Wenguang,Li Zhengrong,Zhou Fulin,et al.Analysis of decoupling to multi-factor role of LRB resilience model[J].Earthquake Engineering and Engineering Vibration,2002,22(6):115-121.(in Chinese)
[11]刘文光.橡胶隔震支座力学性能及隔震结构地震反应分析研究[D].北京:北京工业大学,2003. Liu Wenguang.Mechanics properties of rubber bearings and earthquake response analysis of isolated structure[D].Beijing:Beijing University of Technology, 2003.(in Chinese)
[12]徐忠根,周福霖.我国首栋橡胶垫隔震住宅楼动力分析[J].世界地震工程,1996,12(1):38-42. Xu Zhonggen,Zhou Fulin.Dynamic analysis of the first rubber bearing isolated building of our country [J].World Earthquake Engineering,1996,12(1): 38-42.(in Chinese)
[13]Komuro T,NishikawaY,KimuraY,et al.Development and realization of base isolation system for high-rise buildings[J].Journal of Advanced Concrete Technology,2005,3(2):233-239.
[14]周乾,闫维明,周锡元,等.我国博物馆陈列文物防震技术现状研究[J].灾害学,2010,25(S):201- 206. Zhou Qian,Yan Weiming,Zhou Xiyuan,et al.Present status of aseismic techniques for domestic museum cultural relics[J].Journal of Catastrophology,2010, 25(S):201-206.(in Chinese)
[15]Akiyama H.Earthquake resistant limit-state design for buildings[M].University of Tokyo Press,1985.
[16]Chiba Y,Satsukawa K,Kitamura H,et al.Energy balance-based seismic response prediction methods for seismic isolated buildings with rubber bearings, dampers and low friction elastic sliding bearings[J]. Journal of Structural and Construction Engineering (Transactions of AIJ),2004,575:65-72.
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