多点激励下大跨隔震结构分析模型
|
摘要
基于多点地震激励下大跨隔震结构分析模型存在一定适用范围这一事实,通过理论研究和数值分析对此进行讨论,以指导其合理应用.首先探讨了加速度模型和位移模型中不可忽视的阻尼问题,并针对大跨隔震结构的结构形式和动力特征,通过严格的理论推导阐述了加速度模型和位移模型各自存在的误差和适用性;进一步指出位移模型在隔震结构中盲目应用会导致错误结果,需要加以修正;最后通过简单数值算例对2种模型以及修正模型的计算精度进行了分析.理论研究和数值分析验证了多点地震分析模型在大跨隔震结构应用中存在的问题.
Analysis models of long-span isolated model under multi-support earthquake excitations have limited application range,thus theoretical and numerical research were carried out to guide the reasonable application of analysis models.The nonnegligible damping characteristics in the displacement model and acceleration model were firstly studied,and by considering its special structural type and dynamic properties of long-span isolated structure,a rigorous theory derivation were carried out to explain the availability and probable existing problems in the two models.It is pointed out that the displacement model would produce huge error in the earthquake analysis of long-span isolated structures and it should be revised for more accurate results.Finally,numerical work was carried out for verifying the proposed theoretic analysis results about displacement model and acceleration model.
Analysis models of long-span isolated model under multi-support earthquake excitations have limited application range,thus theoretical and numerical research were carried out to guide the reasonable application of analysis models.The nonnegligible damping characteristics in the displacement model and acceleration model were firstly studied,and by considering its special structural type and dynamic properties of long-span isolated structure,a rigorous theory derivation were carried out to explain the availability and probable existing problems in the two models.It is pointed out that the displacement model would produce huge error in the earthquake analysis of long-span isolated structures and it should be revised for more accurate results.Finally,numerical work was carried out for verifying the proposed theoretic analysis results about displacement model and acceleration model.
引文
[1]Clough R W,Penzien J.Dynamics of structures[M].New York:McGraw-Hill Book Co,1975.
[2]Yamamura N,Tanaka H.Response analysis of flexi-ble MDF systems for multiple-support seismic excita-tion[J].Earthquake Engineering and StructuralDynamics,1990,19(3):345-357.
[3]Hao H.Response of multiply-supported rigid plate tospatially correlated seismic excitations[J].Earth-quake Engineering&Structural Dynamics,1991,20(9):821-838.
[4]Hao H,Xiao N D.Response of asymmetric struc-tures to multiple ground motions[J].Journal ofStructural Engineering,1995,121(11):1557-1564.
[5]Su L,Dong S L,Kato S.A new average responsespectrum method for linear response analysis of struc-tures to spatial earthquake ground motions[J].Engi-neering Structures,2006,28(13):1835-1842.
[6]Kiureghian A D,Ansgar N.Response spectrummethod for multi-support seismic excitations[J].Earthquake Engineering and Structural Dynamics,1992,21(8):713-740.
[7]Berrah M,Kausel E.A modal combination rule forspatially varying seismic motions[J].EarthquakeEngineering and Structural Dynamics,1993,22(9):791-800.
[8]李杰,李建华.多点激励下结构随机地震反应分析的反应谱方法[J].地震工程与工程振动,2004,24(3):21-29.
[9]Wang J J,Chen H.A new spatial coherence modeland analytical coefficients for multi-support responsespectrum combination[J].Earthquake Engineeringand Engineering Vibration,2007,6(3):225-235.
[10]刘先明.大跨度空间网格结构多点输入反应谱理论的研究与应用[D].南京:东南大学土木工程学院,2003.
[11]叶继红,孙建梅.多点激励反应谱法的理论研究[J].应用力学学报,2007,24(1):47-53.
[12]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.
[13]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.
[14]周国良,李小军.用改进的大质量法分析行波对连续刚构桥地震反应的影响[J].土木建筑与环境工程,2010,32(S1):217-220.
[15]周国良;李小军;喻畑等.大刚度法在结构动力分析中的应用、误差分析与改进[J].工程力学,2011,28(8):30-36.
[16]Wilson E L.Static and dynamic analysis of struc-tures:aphysical approach with emphasis on earth-quake engineering[M].Berkley:Computer andstructures Inc,2004.
[2]Yamamura N,Tanaka H.Response analysis of flexi-ble MDF systems for multiple-support seismic excita-tion[J].Earthquake Engineering and StructuralDynamics,1990,19(3):345-357.
[3]Hao H.Response of multiply-supported rigid plate tospatially correlated seismic excitations[J].Earth-quake Engineering&Structural Dynamics,1991,20(9):821-838.
[4]Hao H,Xiao N D.Response of asymmetric struc-tures to multiple ground motions[J].Journal ofStructural Engineering,1995,121(11):1557-1564.
[5]Su L,Dong S L,Kato S.A new average responsespectrum method for linear response analysis of struc-tures to spatial earthquake ground motions[J].Engi-neering Structures,2006,28(13):1835-1842.
[6]Kiureghian A D,Ansgar N.Response spectrummethod for multi-support seismic excitations[J].Earthquake Engineering and Structural Dynamics,1992,21(8):713-740.
[7]Berrah M,Kausel E.A modal combination rule forspatially varying seismic motions[J].EarthquakeEngineering and Structural Dynamics,1993,22(9):791-800.
[8]李杰,李建华.多点激励下结构随机地震反应分析的反应谱方法[J].地震工程与工程振动,2004,24(3):21-29.
[9]Wang J J,Chen H.A new spatial coherence modeland analytical coefficients for multi-support responsespectrum combination[J].Earthquake Engineeringand Engineering Vibration,2007,6(3):225-235.
[10]刘先明.大跨度空间网格结构多点输入反应谱理论的研究与应用[D].南京:东南大学土木工程学院,2003.
[11]叶继红,孙建梅.多点激励反应谱法的理论研究[J].应用力学学报,2007,24(1):47-53.
[12]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.
[13]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.
[14]周国良,李小军.用改进的大质量法分析行波对连续刚构桥地震反应的影响[J].土木建筑与环境工程,2010,32(S1):217-220.
[15]周国良;李小军;喻畑等.大刚度法在结构动力分析中的应用、误差分析与改进[J].工程力学,2011,28(8):30-36.
[16]Wilson E L.Static and dynamic analysis of struc-tures:aphysical approach with emphasis on earth-quake engineering[M].Berkley:Computer andstructures Inc,2004.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心