三维基础隔震结构非线性地震能量响应分析
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摘要
建立了基础隔震结构的地震能量响应方程,利用有限元分析软件模拟了铅销橡胶支座的双向非线性性能,研究了铅销橡胶支座主要参数和不同地震动激励对基础隔震结构非线性地震能量响应的影响.结果表明:(1)铅销橡胶支座的滞回耗能能够消耗大量的地震总输入能,进而证实了其减隔震的有效性;(2)铅销直径和刚度比对其减隔震能力的有较大影响;(3)不同特性的地震动对结构的地震能量响应影响显著.
The energy equations of the base-isolated structures are established based on the energy equilibrium theory.Considering the effect of principal parameters of lead rubber bearing and dissimilar seismic motions,dimensional FEA model of base-isolated structures is established.The seismic energy response analyses for base-isolated structures are carried out under the three-dimensional seismic motions.Results are obtained as follows.(1)Most of the seismic input energy can be consumed by the hysteretic energy dissipation of lead rubber bearing.(2)Lead core diameter or stiffness ratio have great effect on seismic energy response of base-isolated structure.(3)The seismic energy response of base-isolated structure is greatly discrepant under different seismic motions.
The energy equations of the base-isolated structures are established based on the energy equilibrium theory.Considering the effect of principal parameters of lead rubber bearing and dissimilar seismic motions,dimensional FEA model of base-isolated structures is established.The seismic energy response analyses for base-isolated structures are carried out under the three-dimensional seismic motions.Results are obtained as follows.(1)Most of the seismic input energy can be consumed by the hysteretic energy dissipation of lead rubber bearing.(2)Lead core diameter or stiffness ratio have great effect on seismic energy response of base-isolated structure.(3)The seismic energy response of base-isolated structure is greatly discrepant under different seismic motions.
引文
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[2]BRUNEAU Michel,WANG Niandi.Some aspects of energy methods for the inelastic seismic response of ductile SDOF structures[J].Engineering Structures,1996,18(1):1-12.
[3]DECANINI Luis D,MOLLAIOLI Fbrizio.An energy-based methodology for the assessment of seismic demand[J].Soil Dynamics and Earthquake Engineering,2001,21:113-137.
[4]钟铁毅,杨风利,夏禾.基于能量法的铅芯橡胶支座隔震桥梁设计方法[J].中国铁道科学,2009,30(2):43-48.ZHONG Tie-yi,YANG Feng-li,XIA He.The Design Method of the Seismically Isolated Bridge by Lead Rubber Bearing Based on Energy Method[J].China Railway Science,2009,30(2):43-48.
[5]DUTTA Anindya.On Energy Based Seismic Analysis and Design of Highway Bridge[D].Faculty of the Graduate School of the StateUniversity of New York at Buffalo,1999.
[6]HOUSNER G W.Limit Design of Structures to Resist Earthquake,Proceedings of the First World Conference on Earthquake Engineering,Berkeley,CA[C],1956.
[7]MCKEVIT,W E.et al.Hysteretic Energy Spectra in Seismic Design[C]∥Proceedings of 7th WCEE,Vo1.7,1980.
[8]中华人民共和国建设部.GB50011—2010建筑抗震设计规范[S].北京,中国建筑工业出版社,2010.Ministry of Construction of the Peoples Republic of China.GB50011—2010Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.
[9]钟铁毅,李宇,杨风利,等.铅芯橡胶支座隔震连续梁桥的地震能量反应分析[J].中国铁道科学,2009,30(3):9-14.ZHONG Tie-yi,LI Yu,YANG Feng-li,et al.Analysis on the Seismic Energy Continuous Beam Bridge Response for Seismically Isolated with Lead Rubber Bearing[J].China Railway Science,2009,30(3):9-14.
[10]张贞阁.铁路连续梁桥的减隔震性能研究[D].北京:北京交通大学,2003.ZHANG Zhen-ge.Seismic Isolation Performance study of Railway Continuous Beam Bridge[D].Beijing:Beijing JiaoTong University,2003.
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