捏拢效应与P-Δ效应对地震延性需求和损伤指标的影响
|
摘要
文中定量地分析了捏拢效应和P-Δ效应对非弹性单自由度体系的地震延性需求和Park-Ang地震损伤指标的概率统计特征的影响。采用Bouc-W en模型描述具有P-Δ效应、捏拢效应、强度退化、刚度退化等典型特性的恢复力-位移滞回曲线;根据非弹性单自由度体系在69条强震记录作用下的动力响应,定量地分析了捏拢效应和P-Δ效应对地震延性需求和Park-Ang地震损伤指标的均值和变异系数的影响,并建立了地震延性需求的概率预测模型。计算结果表明,捏拢效应和由重力引起的P-Δ效应对地震延性需求的影响较大,而由竖向地震激励引起的P-Δ效应对地震延性需求的影响很小;对于短周期体系,建议采用对数正态或Frechet分布来描述地震延性需求的概率分布;对于长周期体系,采用Frechet分布则更为合理。
Assessment of the influences of pinching and P-Δ effects on seismic ductility demand and Park-Ang seismic damage index of inelastic single-degree-of-freedom(SDOF) system is carried out.The hysteretic behaviour of the SDOF system is described using the Bouc-Wen model taking into account strength and stiffness degradations as well as pinching and P-Δ effects.Analysis results show that the P-Δ and the pinching effects influence the seismic ductility demand,while the effect induced by the vertical excitation is negligible.Probabilistic models for predicting the mean and coefficient of variation of seismic ductility demand considering the pinching and P-Δ effects are recommended based on the samples obtained from 69 California records.It is suggested that for short-period system,the seismic ductility demand can be modeled as either the Lognormal or the Frechet distribution,while for long-period system,the Frechet distribution is preferred.
Assessment of the influences of pinching and P-Δ effects on seismic ductility demand and Park-Ang seismic damage index of inelastic single-degree-of-freedom(SDOF) system is carried out.The hysteretic behaviour of the SDOF system is described using the Bouc-Wen model taking into account strength and stiffness degradations as well as pinching and P-Δ effects.Analysis results show that the P-Δ and the pinching effects influence the seismic ductility demand,while the effect induced by the vertical excitation is negligible.Probabilistic models for predicting the mean and coefficient of variation of seismic ductility demand considering the pinching and P-Δ effects are recommended based on the samples obtained from 69 California records.It is suggested that for short-period system,the seismic ductility demand can be modeled as either the Lognormal or the Frechet distribution,while for long-period system,the Frechet distribution is preferred.
引文
[1]童根树,赵永峰.动力P-Δ效应对地震力调整系数的影响[J].浙江大学学报:工学版,2007,41(1):120-126.
[2]Gupta A,Krawinkler H.DynamicP-Δeffects for flexible inelastic steel structures[J].Journal of Structural Engineering-ASCE.2000,126(1):145-154.
[3]Williamson E B.Evaluation of damage andP-Δeffects for systemunder earthquake excitation[J].Journal of Structural Engineering-ASCE,2003,129(8):1036-1046.
[4]Kalkan E,Graizer V.Coupled tilt and translational ground motion response spectra[J].Journal of Structural Engineering-ASCE,2007,133(5):605-619.
[5]翟长海,孙亚民,谢礼立.考虑P-Δ效应的等延性位移比谱[J].哈尔滨工业大学学报,2007,39(10):1513-1516.
[6]Ma F,Ng CHand Ajavakom N.On system identification and response prediction of degrading structures[J].Structural Control&Health Monito-ring,2006,13(1):347-364.
[7]Foliente G C,Singh MP,Noori MN.Equivalent linearization of generally pinching hysteretic,degrading systems[J].Earthquake Engineering&Structural Dynamics,1996,25(6):611-629.
[8]Goda K,Hong HP,Lee C S.Probabilistic characteristics of seismic ductility demand of SDOF systems with Bouc-Wen hysteretic behaviour[J].Journal of Earthquake Engineering,2009,13(5):600-622.
[9]Shampine L F,Reichelt MW.The MATLAB ODE suite[J].SIAMJournal of Scientific Computing,1997,18(1):1?22.
[10]Park Y J,Ang AHS.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering-ASCE,1985,111(4):722-739.
[11]Marano G C,Greco R.Damage and ductility demand spectra assessment of hysteretic degrading systems subject to stochastic seismic loads[J].Journal of Earthquake Engineering,2006,10(5):615-640.
[12]Pacific Earthquake Engineering Research(PEER)Center.Next generation attenuation database.[DB]http://peer.berkeley.edu/nga/index.html.2007.
[13]Hong HP,Goda K.Orientation-dependent ground-motion measure for seismic-hazard assessment[J].Bulletin of the Seismological Societyof America,2007,97:1525-1538.
[14]Abrahamson N A,Silva W J.Empirical response spectral attenuation relations for shallowcrustal earthquakes[J].Seismological Research Let-ters,1997,68(1):94-127.
[15]Boore D M,Joyner W B,Fumal T E.Equations for estimating horizontal response spectra and peak acceleration from western North Americaearthquakes:A summary of recent work[J].Seismological Research Letters,1997,68(1):128-153.
[16]Steidl J H,Lee Y.The SCEC Phase III strong-motion database[J].Bulletin of the Seismological Society of America,2000,90(6B):S113-S135.
[17]Campbell K W,Bozorgnia Y.Updated near-source ground-motion(attenuation)relations for the horizontal and vertical components of peakground acceleration and acceleration response spectra[J].Bulletin of the Seismological Society of America,2003,93(1):314-331.
[18]Hong HP,Hong P.Assessment of ductility demand and reliability of bilinear single-degree-of-freedom systems under earthquake loading[J].Canadian Journal of Civil Engineering,2007,34(12):1606-1615.
[19]杨伟,欧进萍.基于能量原理的Park&Ang损伤模型简化计算方法[J].地震工程与工程振动,2009,29(2):159-165.
[2]Gupta A,Krawinkler H.DynamicP-Δeffects for flexible inelastic steel structures[J].Journal of Structural Engineering-ASCE.2000,126(1):145-154.
[3]Williamson E B.Evaluation of damage andP-Δeffects for systemunder earthquake excitation[J].Journal of Structural Engineering-ASCE,2003,129(8):1036-1046.
[4]Kalkan E,Graizer V.Coupled tilt and translational ground motion response spectra[J].Journal of Structural Engineering-ASCE,2007,133(5):605-619.
[5]翟长海,孙亚民,谢礼立.考虑P-Δ效应的等延性位移比谱[J].哈尔滨工业大学学报,2007,39(10):1513-1516.
[6]Ma F,Ng CHand Ajavakom N.On system identification and response prediction of degrading structures[J].Structural Control&Health Monito-ring,2006,13(1):347-364.
[7]Foliente G C,Singh MP,Noori MN.Equivalent linearization of generally pinching hysteretic,degrading systems[J].Earthquake Engineering&Structural Dynamics,1996,25(6):611-629.
[8]Goda K,Hong HP,Lee C S.Probabilistic characteristics of seismic ductility demand of SDOF systems with Bouc-Wen hysteretic behaviour[J].Journal of Earthquake Engineering,2009,13(5):600-622.
[9]Shampine L F,Reichelt MW.The MATLAB ODE suite[J].SIAMJournal of Scientific Computing,1997,18(1):1?22.
[10]Park Y J,Ang AHS.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering-ASCE,1985,111(4):722-739.
[11]Marano G C,Greco R.Damage and ductility demand spectra assessment of hysteretic degrading systems subject to stochastic seismic loads[J].Journal of Earthquake Engineering,2006,10(5):615-640.
[12]Pacific Earthquake Engineering Research(PEER)Center.Next generation attenuation database.[DB]http://peer.berkeley.edu/nga/index.html.2007.
[13]Hong HP,Goda K.Orientation-dependent ground-motion measure for seismic-hazard assessment[J].Bulletin of the Seismological Societyof America,2007,97:1525-1538.
[14]Abrahamson N A,Silva W J.Empirical response spectral attenuation relations for shallowcrustal earthquakes[J].Seismological Research Let-ters,1997,68(1):94-127.
[15]Boore D M,Joyner W B,Fumal T E.Equations for estimating horizontal response spectra and peak acceleration from western North Americaearthquakes:A summary of recent work[J].Seismological Research Letters,1997,68(1):128-153.
[16]Steidl J H,Lee Y.The SCEC Phase III strong-motion database[J].Bulletin of the Seismological Society of America,2000,90(6B):S113-S135.
[17]Campbell K W,Bozorgnia Y.Updated near-source ground-motion(attenuation)relations for the horizontal and vertical components of peakground acceleration and acceleration response spectra[J].Bulletin of the Seismological Society of America,2003,93(1):314-331.
[18]Hong HP,Hong P.Assessment of ductility demand and reliability of bilinear single-degree-of-freedom systems under earthquake loading[J].Canadian Journal of Civil Engineering,2007,34(12):1606-1615.
[19]杨伟,欧进萍.基于能量原理的Park&Ang损伤模型简化计算方法[J].地震工程与工程振动,2009,29(2):159-165.
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