基于塑性损耗的超高层建筑结构抗震性能分析
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摘要
基于能量分析原理提出了一个建筑结构的塑性损耗指标,即结构的塑性损耗能在总输入能中的比例,用来衡量建筑结构在地震载荷作用下的实际损伤程度.通过有限元软件ABAQUS运用非线性动力弹塑性分析方法分析了一个典型框架-核心筒超高层结构.计算了该结构在同一地震波不同地震强度下的塑性损耗指标、构件和层的塑性损耗能分配,以及在不同地震波同一地震强度下的塑性损耗指标、层塑性损耗能分配;模拟了该结构相应的损伤破坏分布情况.两种方法表征的结果趋势一致,表明结构的塑性损耗指标和塑性损耗能分配可用来衡量结构整体和局部塑性损伤破坏情况.
Based on the energy analysis principle,a structural plastic damage index was proposed,which is defined as the ratio of structural inelastic energy to total input energy.The index can be used to estimate structural damage under earthquake load.Seismic simulation of a typical super high-rise frame-tube structure was carried out by conducting a nonlinear dynamic time history response analysis using ABAQUS.The structural plastic damage index and plastic dissipated energy distribution along storeys and in different structural components were calculated under the same earthquake wave with different intensities.While structural plastic damage index and plastic dissipated energy distribution along storeys were also calculated under the same intensity with different earthquake waves.The corresponding structural damage configurations were also simulated.The results of the two methods were compared and found to be consistent,which shows that the plastic damage index and plastic dissipated energy distribution are valuable for estimating the overall and local damage of structures.
Based on the energy analysis principle,a structural plastic damage index was proposed,which is defined as the ratio of structural inelastic energy to total input energy.The index can be used to estimate structural damage under earthquake load.Seismic simulation of a typical super high-rise frame-tube structure was carried out by conducting a nonlinear dynamic time history response analysis using ABAQUS.The structural plastic damage index and plastic dissipated energy distribution along storeys and in different structural components were calculated under the same earthquake wave with different intensities.While structural plastic damage index and plastic dissipated energy distribution along storeys were also calculated under the same intensity with different earthquake waves.The corresponding structural damage configurations were also simulated.The results of the two methods were compared and found to be consistent,which shows that the plastic damage index and plastic dissipated energy distribution are valuable for estimating the overall and local damage of structures.
引文
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[11]Li Aiqun,Gao Zhenshi.Engineering structure aseismicdesign[M].Beijing:China Architecture&BuildingPress,2004:10-13.李爱群,高振世.工程结构抗震设计[M].北京:中国建筑工业出版社,2004:10-13.
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[2]Fajfar P,Vidic T.Consistent inelastic design spectra:hysteretic and input energy[J].EarthquakeEngineering and Structural Dynamics,1994,23(3):57-65.
[3]Housner G W.Limit design of structures to resistearthquakes[C]//Proceedings of1st WorldConference on Earthquake Engineering,California,1956.
[4]Wei Xinlei,Zhou Yun,YU Jinghai,et al.Researcheson new methods of aseismic design of structures basedon energy concept[J].World Earthquake Engineering,2003,19(3):62-67.魏新磊,周云,于敬海,等.基于结构能量分析的抗震设计新方法的研究[J].世界地震工程,2003,19(3):62-67.
[5]Mao Jianmeng,Xie Lili.Computation of structuralhysteretic energy based on MPA procedure[J].Journalof Earthquake Engineering and Engineering Vibration,2008,28(6):33-38.毛建猛,谢礼立.基于MPA方法的结构滞回耗能计算[J].地震工程与工程振动,2008,28(6):33-38.
[6]Manfredi G.Evaluation of seismic energy demand[J].Earthquake Engineering and Structural Dynamics,2001,30(4):485-499.
[7]Xiao Mingkui,Liu Bo,Bai Shaoliang.Analysis of thetotal energy and its influencing factors for seismicstructures[J].Journal of Chongqing JianzhuUniversity,1996,18(2):20-33.肖明葵,刘波,白绍良.抗震结构总输入能量及其影响因素分析[J].重庆建筑大学学报,1996,18(2):20-33.
[8]Fajfar P,Fischinger M,A seismic procedure includingenergy concept[C]//Proceedings of IX ECEE,Moscow,September,1990:312-321.
[9]Uang C M,Bertero V V.Evaluation of seismic energyin structures[J].Earthquake Engineering andStructural Dynamics,1990,19(1):77-90.
[10]Zahrah T,Hall J.Earthquake energy absorption inSDOF structures[J].Journal of StructuralEngineering,1984,110(8):1757-1772.
[11]Li Aiqun,Gao Zhenshi.Engineering structure aseismicdesign[M].Beijing:China Architecture&BuildingPress,2004:10-13.李爱群,高振世.工程结构抗震设计[M].北京:中国建筑工业出版社,2004:10-13.
[12]GB50010-2002,Concrete Structure Design Code[S].GB50010-2002,混凝土结构设计规范[S].
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