地面运动特征对Bouc-Wen振子的IDA影响分析
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摘要
基于Bouc-Wen模型的Barber捏缩及强度退化修正,通过模块化编程,将地震动峰值加速度和峰值速度之比(PGA/PGV)作为指定场地条件下的地面运动特征参数;分析该参数对于增量动力分析(IDA)曲线的影响;比较Bouc-Wen模型修正前后的IDA曲线受PGA/PGV的影响差异。计算结果表明:Bouc-Wen修正模型能够模拟较典型的非线性特征,Bouc-Wen修正及非修正模型的IDA曲线随PGA/PGV增加均有显著变化趋势,且受结构特征影响,两种模型的曲线变化趋势亦有明显差异。
Programming modules are presented for the pinching and degrading modification of Bouc-Wen oscillator. An analysis is performed to investigate the significance of peak ground acceleration to velocity ration on the IDA curves,which are based on modified and un-modified Bouc-Wen oscillators. The peculiarities of IDA curves variation trend with the increasing of PGA / PGV for the two kinds of oscillators are compared. The results presented indicate that the modified Bouc-Wen oscillator is fit for the structural nonlinear dynamic simulation,PGA / PGV is significant to the shape of IDA curves,and with the PGA / PGV increasing,there is significant difference in the IDA curves variation trend between the two kinds of Bouc-Wen models.
Programming modules are presented for the pinching and degrading modification of Bouc-Wen oscillator. An analysis is performed to investigate the significance of peak ground acceleration to velocity ration on the IDA curves,which are based on modified and un-modified Bouc-Wen oscillators. The peculiarities of IDA curves variation trend with the increasing of PGA / PGV for the two kinds of oscillators are compared. The results presented indicate that the modified Bouc-Wen oscillator is fit for the structural nonlinear dynamic simulation,PGA / PGV is significant to the shape of IDA curves,and with the PGA / PGV increasing,there is significant difference in the IDA curves variation trend between the two kinds of Bouc-Wen models.
引文
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[13]余波,刘陶钧,洪汉平.捏拢效应与P-Δ效应对地震延性需求和损伤指标的影响[J].地震工程及工程振动,2011,31(4):94-105
[14]赵冠远,安明喆,季文玉,等.考虑弹塑性结构退化和捏拢滑移效应的光滑滞回模型[J].中国铁道科学,2011,32(3):52-57
[15]Bouc R.Forced vibration of mechanical systems with hysteresis[C]//Proceedings of the Fourth Conference on Nonlinear Oscillation.Prague,Czechoslovakia,1967
[2]Mehanny S S,Cordova P P.Development of a two-parameter seismic intensity measure and probabilistic design procedure[J].Journal of Engineering Applied Scinece,2004,51(2):233-252
[3]Kafali C,Grigoriu M.Seismic fragility analysis:application to simple linear and nonlinear systems[J].Earthquake Engineering and Structural Dynamics,2007,36(2):1885-1900
[4]Zhong J,Gardoni P.Seismic fragility estimates for reinforced concrete bridges in M-R-a space[C]//Safety,reliability and risk of structures,infrastructures and engineering system.Furuta,Fangopol&Shinnozuka.Japan:Taylor&Francis Group,2010:3630-3637
[5]Zhu T J,Heidebrecht A C,Tso W K.Effect of peak ground acceleration to velocity ratio on ductility demand of inelastic systems[J].Earthquake Engineering and Structural Dynamics,1988,16(1):63-79
[6]Sawada T,Hirao K,Yamamoto H.Relation between maximum amplitude ratio(a/v,ad/v2)and spectral parameters of earthquake ground motion[C]//Tenth World Conference on Earthquake Engineering.Rotterdam:Balkema,1992:617-622
[7]Kwon O S,Elnashai A.The effect of material and ground motion uncertainty on the seismic vulnerability curves of RC structure.Engineering Structure,2006(28):289-303
[8]Wen Y K.Method for random vibration of hysteretic systems[J].Journal of Engineering Mechanics,1976,102(2):249-263
[9]Baber T T,Wen Y K.Random vibration of hysteretic degrading systems[J].Journal of Engineering Mechnanics,1985,107(6):1069-1087
[10]Park Y J,Wen Y K,Ang A H S.Random vibration of hysteretic systems under bidirectional ground motions[J].Earthquake Engineering and Structural Dynamics,1986,14(6):543-557
[11]Foliente G C.Hysteresis modeling of wood joints and structural systems[J].Journal of Structural Engineering,1995,121(6):1013-1022
[12]Karavasilis T L,Kerawal S,Hale E.Hysteretic model for steel energy dissipation devices and evaluation of a minimal-damage seismic design approach for steel building[J].Journal of Constructional Steel Research,2012,70(3):358-367
[13]余波,刘陶钧,洪汉平.捏拢效应与P-Δ效应对地震延性需求和损伤指标的影响[J].地震工程及工程振动,2011,31(4):94-105
[14]赵冠远,安明喆,季文玉,等.考虑弹塑性结构退化和捏拢滑移效应的光滑滞回模型[J].中国铁道科学,2011,32(3):52-57
[15]Bouc R.Forced vibration of mechanical systems with hysteresis[C]//Proceedings of the Fourth Conference on Nonlinear Oscillation.Prague,Czechoslovakia,1967
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