近场脉冲型地震作用下结构响应预测研究
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摘要
选择典型的具有速度脉冲的近场地震动记录组成地震记录库,建立了3个处于不同周期范围的墩柱结构模型,利用非线性动力分析考察了采用非弹性位移响应谱值作为近场脉冲型地震动的强度参数来预测结构地震响应的有效性,并探讨了非线性振子的参数选取对利用非弹性位移响应谱值预测结构地震响应的影响;以模型的静Pushover分析得到的屈服位移为参照,研究了非线性振子的屈服位移选取对结构地震响应预测的影响,研究结果对利用非弹性位移响应谱进行结构响应预测以及基于概率的结构抗震性能评估具有重要的意义。
The typical pulse-type near-field ground motion records were chosen to establish a record base,and three pier models with different natural period were established;the effect of structural response estimation by using the non-elastic response spectral displacement of ground motion was studied by using a nonlinear time history analysis,and the influence of parameters of the nonlinear oscillator on seismic response estimation was observed;the yield displacement of the nonlinear oscillator was defined according to the static pushover analysis result,and its influence on response estimation was studied.The study result is important for structural seismic response estimation by using the non-elastic response spectral displacement and the probability-based aseismic performance evaluation.
The typical pulse-type near-field ground motion records were chosen to establish a record base,and three pier models with different natural period were established;the effect of structural response estimation by using the non-elastic response spectral displacement of ground motion was studied by using a nonlinear time history analysis,and the influence of parameters of the nonlinear oscillator on seismic response estimation was observed;the yield displacement of the nonlinear oscillator was defined according to the static pushover analysis result,and its influence on response estimation was studied.The study result is important for structural seismic response estimation by using the non-elastic response spectral displacement and the probability-based aseismic performance evaluation.
引文
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[6]Chopra A K,Chintanapakdee C.Inelastic deformationratios for design and evaluation of structures:SDOFbilinear systems[J].Journal of Structural Engineering,2004,130(9):1309―1319.
[7]Nassar A A,Krawinkler H.Seismic demands for SDOFand MDOF systems[R].Earthquake Engineering CenterReport No.95,Stanford University,Stanford,1991.http://blume.stanford.edu/Blume/TRList.htm(Accessed10/10/2008).
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[9]Next generation attenuation of ground motions(NGA)project[DB].2008.http://peer.berkeley.edu/nga/(Accessed12/20/2008).
[10]SeismoSoft Ltd.SeismoStruct―A computer program forstatic and dynamic nonlinear analysis of framed structures[CP].http://www.seismosoft.com(Accessed 10/5/2008).
[2]Praveen K Malhotra.Response of buildings to near-fieldpulse-like ground motions[J].Earthquake Engineering&Structural Dynamics,1999,28:1309―1326.
[3]Wang G Q,Zhou X Y,Zhang P Z,Igel H.Characteristicsof amplitude and duration for near fault strong groundmotion from the 1999 Chi-Chi,Taiwan earthquake[J].Soil Dynamics and Earthquake Engineering,2002,22:73―96.
[4]Riddell R,Garcia J E,Garces E.Inelastic deformationresponse of SDOF systems subjected to earthquakes[J].Earthquake Engineering&Structural Dynamics,2002,31(3):515―538.
[5]Chintanapakdee C,Chopra A K.Evaluation of the modalpushover analysis procedure using vertically regular andirregular generic frames[R].EERC ReportNo.EERC-2003/03,University of California,Berkeley,CA:213,2003.
[6]Chopra A K,Chintanapakdee C.Inelastic deformationratios for design and evaluation of structures:SDOFbilinear systems[J].Journal of Structural Engineering,2004,130(9):1309―1319.
[7]Nassar A A,Krawinkler H.Seismic demands for SDOFand MDOF systems[R].Earthquake Engineering CenterReport No.95,Stanford University,Stanford,1991.http://blume.stanford.edu/Blume/TRList.htm(Accessed10/10/2008).
[8]Ruiz-García J,Miranda E.Inelastic displacement ratiosfor evaluation of existing structures[J].EarthquakeEngineering&Structural Dynamics,2003,32(8):1237―1258.
[9]Next generation attenuation of ground motions(NGA)project[DB].2008.http://peer.berkeley.edu/nga/(Accessed12/20/2008).
[10]SeismoSoft Ltd.SeismoStruct―A computer program forstatic and dynamic nonlinear analysis of framed structures[CP].http://www.seismosoft.com(Accessed 10/5/2008).
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