基于能量反应谱的抗弯钢框架结构能量计算
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摘要
基于能量的抗震性态设计方法需要合理估计实际结构的地震动输入能量及滞回耗能,以近场、远场地震动记录各6条作为输入,建立两组地震动总输入能及滞回耗能的等效速度谱,提出根据能量反应谱估计多自由度体系能量的计算方法。采用弹塑性时程分析法对3个不同层数的钢框架算例评估能量计算方法的合理性。结果表明:基于能量反应谱计算多自由度体系总输入能及滞回耗能的方法精度良好,结果可靠。对高层结构或结构遭受对高阶振型敏感的地震波,建议按该方法考虑高阶振型所携带能量。
Total input energy and hysteretic energy of structures need to be evaluated reasonably in energy-based seismic design.A total of 12 near-fault and far-fault ground motion records are selected to construct input energy spectrum and hysteretic spectrum,and a simple procedure is presented in this paper for estimating the total input energy and hysteretic energy demand of MDOF systems based on energy spectrums.The energy of three moment-resisting steel frames of different stories is evaluated using nonlinear time history method.The results indicate that the simplified procedure based on energy spectrums has high accuracy,and the contributions of higher modes can be taken into consideration for high-rise structures,especially when subjected to earthquake waves sensitive to high modes.
Total input energy and hysteretic energy of structures need to be evaluated reasonably in energy-based seismic design.A total of 12 near-fault and far-fault ground motion records are selected to construct input energy spectrum and hysteretic spectrum,and a simple procedure is presented in this paper for estimating the total input energy and hysteretic energy demand of MDOF systems based on energy spectrums.The energy of three moment-resisting steel frames of different stories is evaluated using nonlinear time history method.The results indicate that the simplified procedure based on energy spectrums has high accuracy,and the contributions of higher modes can be taken into consideration for high-rise structures,especially when subjected to earthquake waves sensitive to high modes.
引文
[1]Housner G W.Limit design of structures to resistearthquake[C]//Proceedings of the 1st WorldConference on Earthquake Engineering.Berkeley,CA,1956
[2]Decanini L D,Mollaioli F.Formulation of elasticearthquake input energy spectra[J].EarthquakeEngineering and Structural Dynamics,1998,27(12):1503-1522
[3]Decanini L D,Mollaioli F.An energy-basedmethodology for the assessment of seismic demand[J].Soil Dynamics and Earthquake Engineering,2001,21(2):113-137
[4]Riddell R,Garcia J E.Hysteretic energy spectrum and damage control[J].Earthquake Engineering andStructural Dynamics,2001,30(12):1791-1816
[5]Uang C M,Bertero V V.Evaluation of seismic energy in structures[J].Earthquake Engineering and StructuralDynamics,1990,19(1):77-90
[6]Ye L P,Otani S.Maximum seismic displacement of inelastic systems based on energy concept[J].Earthquake Engineering and Structural Dynamics,1999,28(12):1483-1499
[7]Erol K.Prediction of seismic demand in building structures[D].California:University ofCalifornia,2006
[8]王丰,李宏男.基于等效单自由度体系的结构滞回耗能估计[J].大连理工大学学报,2007,47(1):85-89(Wang Feng,Li Hongnan.Estimation of hystereticenergy of structures based on equivalent SDOF systems[J].Journal of Dalian University of Technology,2007,47(1):85-89(in Chinese))
[9]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(MaoJianmeng,Xie Lili.Computation of structural hystereticenergy based on MPA procedure[J].Journal ofEarthquake Engineering and Engineering Vibration,2008,28(6):33-38(in Chinese))
[10]Chopra A K.Dynamics of structures:theory and applications to earthquake engineering[M].SecondEdition.New Jersey:Prentice Hall,2001
[2]Decanini L D,Mollaioli F.Formulation of elasticearthquake input energy spectra[J].EarthquakeEngineering and Structural Dynamics,1998,27(12):1503-1522
[3]Decanini L D,Mollaioli F.An energy-basedmethodology for the assessment of seismic demand[J].Soil Dynamics and Earthquake Engineering,2001,21(2):113-137
[4]Riddell R,Garcia J E.Hysteretic energy spectrum and damage control[J].Earthquake Engineering andStructural Dynamics,2001,30(12):1791-1816
[5]Uang C M,Bertero V V.Evaluation of seismic energy in structures[J].Earthquake Engineering and StructuralDynamics,1990,19(1):77-90
[6]Ye L P,Otani S.Maximum seismic displacement of inelastic systems based on energy concept[J].Earthquake Engineering and Structural Dynamics,1999,28(12):1483-1499
[7]Erol K.Prediction of seismic demand in building structures[D].California:University ofCalifornia,2006
[8]王丰,李宏男.基于等效单自由度体系的结构滞回耗能估计[J].大连理工大学学报,2007,47(1):85-89(Wang Feng,Li Hongnan.Estimation of hystereticenergy of structures based on equivalent SDOF systems[J].Journal of Dalian University of Technology,2007,47(1):85-89(in Chinese))
[9]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(MaoJianmeng,Xie Lili.Computation of structural hystereticenergy based on MPA procedure[J].Journal ofEarthquake Engineering and Engineering Vibration,2008,28(6):33-38(in Chinese))
[10]Chopra A K.Dynamics of structures:theory and applications to earthquake engineering[M].SecondEdition.New Jersey:Prentice Hall,2001
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