大跨隔震结构多点地震计算模型的几点注记
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摘要
为避免震害损失,大跨度结构的各支座常采用隔震支座,而隔震工况下的多点地震计算模型可能存在一定误差,本文意在阐明其误差根源并加以解决.首先给出了可用于大跨隔震结构多点地震响应分析的主要计算模型,采用严格理论推导探讨了各模型计算机理的异同和特色,并着重强调了位移模型的理论缺陷和误差,指出位移模型在大跨隔震结构中的盲目应用会导致严重错误,进而提出了实用有效的修正方法和理论依据.最后,以多自由度简化模型和机场维修机库大跨网架实际结构为例,对本文所提观点和建议进行了数值验证,证明了SAP2000内置位移模型在多点地震响应计算中的有效性.
There may be some obvious error in long-span isolated structures' seismic responses calculated by multi-point earthquake calculation models.In this paper error reason and corresponding solution methods are given.Firstly,several main calculation models for seismic analysis of long-span isolated structures under multi-point earthquake excitations are described,and their mechanisms and features are also explained by rigorous theoretical derivation.Then,theoretical defects and error of displacement model are especially pointed out,which would lead to wrong results if arbitrarily utilized in long-span isolated structures.Furthermore,some modification and theoretical basis are given.Finally,a multiple degrees of freedom simple model and a real long-span space truss structure of hangar are given as numerical example,and viewpoints and suggestions in this paper are verified.The displacement mode inherent in SAP2000 software is applicable in seismic response calculation of structure under multi-point earthquake excitations.
There may be some obvious error in long-span isolated structures' seismic responses calculated by multi-point earthquake calculation models.In this paper error reason and corresponding solution methods are given.Firstly,several main calculation models for seismic analysis of long-span isolated structures under multi-point earthquake excitations are described,and their mechanisms and features are also explained by rigorous theoretical derivation.Then,theoretical defects and error of displacement model are especially pointed out,which would lead to wrong results if arbitrarily utilized in long-span isolated structures.Furthermore,some modification and theoretical basis are given.Finally,a multiple degrees of freedom simple model and a real long-span space truss structure of hangar are given as numerical example,and viewpoints and suggestions in this paper are verified.The displacement mode inherent in SAP2000 software is applicable in seismic response calculation of structure under multi-point earthquake excitations.
引文
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[2]MOKHA A S,LEE P L,WANG X,et al.Seismic isolation design of the new international terminal at sanfrancisco international airport[C]//Proceeding of Structural Engineering in the 21st Century 1999.New Orleans,United States:ASCE,1999:95-98.
[3]徐庆阳,李爱群,张志强,等.某大跨网架结构屋盖隔震整体分析[J].工程抗震与加固改造,2007,29(6):20-24.
[4]杨飚,沈世钊,周大睿.Schwedler型单层网壳结构隔震分析[J].华中科技大学学报:城市科学版,2008,25(3):191-194.
[5]李雄彦,薛素铎.竖向隔震的机理研究和装置设计[J].北京工业大学学报,2008,34(10):1043-1047.
[6]王旭东.大跨网格结构竖向隔减震试验研究[D].南京:东南大学,2009.
[7]施卫星,孙黄胜,李振刚,等.上海国际赛车场新闻中心高位隔震研究[J].同济大学学报,2005,33(12):1576-1580.
[8]EDWARD L W.Static and dynamic analysis of structures[M].Berkeley:Computer and Structures,Inc,2004.
[9]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.
[10]LIU Guohuan,GUO Wei,LI Hongnan.An effective and practical method for solving an unnegligible problem inherent in the current calculation model for multisupport seismic analysis of structures[J].Science China(Technological Sciences),2010,53(7):1774-1784.
[11]GUO Wei,YU Zhiwu,LIU Guohuan,et al.Possible existing seismic analysis errors of long span structures and bridges while utilizing multi-point earthquake calculation models[J].Bulletin of Earthquake Engineering,Published Online,2013,DOI:10.1007/s10518-013-9462-3.
[12]GUO Wei,YU Zhiwu,GUO Zhen.Error study of displacement model for seismic analysis of long-span structures subjected to multi-support earthquake excitations[C]//International Conference on Structures and Building Materials 2011.Guangzhou:Trans Tech Publications Inc,2011:163-167.
[13]柯世堂.多点输入下大跨空间结构地震反应分析方法研究[D].哈尔滨:中国地震局工程力学研究所,2007.
[14]柳国环,李宏男,国巍.求解结构地震响应位移输入模型存在的问题及其AMCE实效对策[J].计算力学学报,2009,26(6):862-869.
[15]柳国环,李宏男,国巍,等.求解结构地震响应位移输入模型中存在问题的一种新解决方法[J].工程力学,2010,27(9):55-62.
[16]柳国环,陆新征.基岩地震谱与地震动位移输入的土—结构相互作用(SSI)计算模型改进[J].岩石力学与工程学报,2011,30(5):884-892.
[17]SU Liang,DONG Shilin,KATO S.A new average response spectrum method for linear response analysis of structures to spatial earthquake ground motions[J].Engineering Structures,2006,28(13):1835-1842.
[18]林海,张学辉.基于位移加载的地震时程分析在SAP2000中实现[C]//金土木用户大会论文集.深圳:北京金土木软件技术公司,2011:1-6.
[19]刘树屯,关忆卢.首都机场306m跨飞机库屋盖钢结构设计施工中的一些问题[J].钢结构,1996,11(4):4-8.
[20]American Association of State Highway and Transportation Officials(AASHTO).Guide specifications for seimic isolation design[S].Washington DC:AASHTO,1991.
[2]MOKHA A S,LEE P L,WANG X,et al.Seismic isolation design of the new international terminal at sanfrancisco international airport[C]//Proceeding of Structural Engineering in the 21st Century 1999.New Orleans,United States:ASCE,1999:95-98.
[3]徐庆阳,李爱群,张志强,等.某大跨网架结构屋盖隔震整体分析[J].工程抗震与加固改造,2007,29(6):20-24.
[4]杨飚,沈世钊,周大睿.Schwedler型单层网壳结构隔震分析[J].华中科技大学学报:城市科学版,2008,25(3):191-194.
[5]李雄彦,薛素铎.竖向隔震的机理研究和装置设计[J].北京工业大学学报,2008,34(10):1043-1047.
[6]王旭东.大跨网格结构竖向隔减震试验研究[D].南京:东南大学,2009.
[7]施卫星,孙黄胜,李振刚,等.上海国际赛车场新闻中心高位隔震研究[J].同济大学学报,2005,33(12):1576-1580.
[8]EDWARD L W.Static and dynamic analysis of structures[M].Berkeley:Computer and Structures,Inc,2004.
[9]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.
[10]LIU Guohuan,GUO Wei,LI Hongnan.An effective and practical method for solving an unnegligible problem inherent in the current calculation model for multisupport seismic analysis of structures[J].Science China(Technological Sciences),2010,53(7):1774-1784.
[11]GUO Wei,YU Zhiwu,LIU Guohuan,et al.Possible existing seismic analysis errors of long span structures and bridges while utilizing multi-point earthquake calculation models[J].Bulletin of Earthquake Engineering,Published Online,2013,DOI:10.1007/s10518-013-9462-3.
[12]GUO Wei,YU Zhiwu,GUO Zhen.Error study of displacement model for seismic analysis of long-span structures subjected to multi-support earthquake excitations[C]//International Conference on Structures and Building Materials 2011.Guangzhou:Trans Tech Publications Inc,2011:163-167.
[13]柯世堂.多点输入下大跨空间结构地震反应分析方法研究[D].哈尔滨:中国地震局工程力学研究所,2007.
[14]柳国环,李宏男,国巍.求解结构地震响应位移输入模型存在的问题及其AMCE实效对策[J].计算力学学报,2009,26(6):862-869.
[15]柳国环,李宏男,国巍,等.求解结构地震响应位移输入模型中存在问题的一种新解决方法[J].工程力学,2010,27(9):55-62.
[16]柳国环,陆新征.基岩地震谱与地震动位移输入的土—结构相互作用(SSI)计算模型改进[J].岩石力学与工程学报,2011,30(5):884-892.
[17]SU Liang,DONG Shilin,KATO S.A new average response spectrum method for linear response analysis of structures to spatial earthquake ground motions[J].Engineering Structures,2006,28(13):1835-1842.
[18]林海,张学辉.基于位移加载的地震时程分析在SAP2000中实现[C]//金土木用户大会论文集.深圳:北京金土木软件技术公司,2011:1-6.
[19]刘树屯,关忆卢.首都机场306m跨飞机库屋盖钢结构设计施工中的一些问题[J].钢结构,1996,11(4):4-8.
[20]American Association of State Highway and Transportation Officials(AASHTO).Guide specifications for seimic isolation design[S].Washington DC:AASHTO,1991.
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