基于长周期地震动记录的SDOF体系能量谱探讨
|
摘要
为分析长周期地震动作用下结构的能量反应谱及其影响因素,从1985年墨西哥8.1级地震、1999年集集7.6级地震和2003年日本十胜冲8.0级地震记录库中,选取了36条具有可靠长周期信息的强震记录,以此作为输入,采用能量谱面积归一的方法,首先对单自由度体系的弹性能量谱进行了分析,建议了适用于长周期地震动的简化三段式输入能量谱。在此基础上,讨论了延性系数、阻尼比对弹塑性能量谱的影响;给出了通过调整长周期地震动弹性能量谱参数来确定长周期地震动弹塑性能量谱的方法,并与长周期地震动弹塑性能量谱的拟合结果进行了比较,验证了上述方法的可行性。最后,通过分析长周期地震动累积滞回耗能与弹塑性输入能量之间的比值关系,给出了长周期地震动累积滞回耗能比值谱的计算公式。
In order to analyze energy response spectrum of structures under long-period ground motions and to inspect its influencial factors,36 long-period strong earthquake records were used as inputs,which were chosen from 1985's Mexico earthquake(M8.1),1999's Chi-Chi earthquake(M7.6) and 2003's Japan Tokachi-oki earthquake(M8.0).With the normalized method with respect to the area of input energy spectrum,the earthquake energy spectrum of elastic single degree of freedom(SDOF) system was studied.The input elastic energy spectrum of long-period ground motions was suggested to be simplified into three portions.Subsequently,the influences of ductility factors and damping ratios on elasticplastic energy spectrum were analyzed.A method to get the elastic-plastic energy spectrum under long-period ground motions was proposed by adjusting the factors of input elastic energy spectrum of long-period ground motions,and the feasibility of the method was verified by comparing with the fitting results of long-period ground motions.Finally,based on the analysis of the relationship between cumulative hysteretic energy and elastic-plastic energy,a formula for calculating the cumulative hysteretic energy spectrum under long-period ground motions was suggested.
In order to analyze energy response spectrum of structures under long-period ground motions and to inspect its influencial factors,36 long-period strong earthquake records were used as inputs,which were chosen from 1985's Mexico earthquake(M8.1),1999's Chi-Chi earthquake(M7.6) and 2003's Japan Tokachi-oki earthquake(M8.0).With the normalized method with respect to the area of input energy spectrum,the earthquake energy spectrum of elastic single degree of freedom(SDOF) system was studied.The input elastic energy spectrum of long-period ground motions was suggested to be simplified into three portions.Subsequently,the influences of ductility factors and damping ratios on elasticplastic energy spectrum were analyzed.A method to get the elastic-plastic energy spectrum under long-period ground motions was proposed by adjusting the factors of input elastic energy spectrum of long-period ground motions,and the feasibility of the method was verified by comparing with the fitting results of long-period ground motions.Finally,based on the analysis of the relationship between cumulative hysteretic energy and elastic-plastic energy,a formula for calculating the cumulative hysteretic energy spectrum under long-period ground motions was suggested.
引文
[1]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21-28.WANG Ya-yong.A review of seismic response spectra,timehistory analysis and energy method[J].Journal of BuildingStructures,2000,21(1):21-28.
[2]Akiyama H.Earthquake resistant limit state design forbuildings[M].University of Tokyo Press,1985.
[3]Benavent-Climent A,Lopez-Almansa F,Bravo-Gonzalez D A.Design energy input spectra for moderate-to-high seismicityregions based on Colombian earthquakes[J].Soil Dynamicsand Earthquake Engineering,2010,30:1129-1148.
[4]Amiri G G,Darzi G A,Amiri J V.Design elastic inputenergy spectra based on Iranian earthquakes[J].CanadianJournal of Civil Engineering,2008,35(6):635 646.
[5]Teng J,Dong Z J.Research on energy spectrum of elasticSDOF[C]//The 14th World Conference on EarthquakeEngineering.China:Beijing,2008.
[6]程光煜,叶列平.弹塑性SDOF系统的地震输入能量谱[J].工程力学,2008,25(2):28-39.CHENG Guang-yu,YE Lie-ping.Earthquake input energyspectrum for inelastic SDOF systems[J].EngineeringMechanics,2008,25(2):28-39.
[7]李春锋,张旸.长周期地震动衰减关系研究的迫切性[J].地震地磁观测与研究,2006,27(3):1-8.LI Chun-feng,ZHANG Yang.Urgency of the study of long-period ground motion[J].Seismological and GeomagneticObservation and Research,2006,27(3):1-8.
[8]Uang C M,Bertero V V.Evaluation of seismic energy instructures[J].Earthquake Engineering and StructuralDynamics,1990,19(1):77-99.
[9]胡灿阳,陈清军.基于EMD和最小二乘法的基线漂移研究[J].振动与冲击,2010,29(3):162-167.HU Can-yang,CHEN Qing-jun.Research on baseline driftusing least-square and EMD[J].Journal of Vibration andShock,2010,29(3):162-167.
[10]周雍年,周正华,于海英.设计反应谱长周期段的研究[J].地震工程与工程振动,2004,24(2):15-18.ZHOU Yong-nian,ZHOU Zheng-hua,YU Hai-ying.A study on long period portion of design spectra[J].Earthquake Engineering and Engineering Vibration,2004,24(2):15-18.
[11]Trifunac M,Brady A.A study on the duration of strong earthquake ground motion[J].Bulletin of the Seismological Society of America,1975,65(3):581-626.
[12]Decanini L D,Mollaioli F.Formulation of elastic earthquake input energy spectra[J].Earthquake Engineering and Structural Dynamics,1998,27(12):1503-1522.
[13]Akiyama H.Earthquake-resistant design method for buildings based on energy balance[M].Gihoudou Syuppan Press,1999.
[14]Fajfar P,Vidic T.Consistent inelastic design spectra hysteretic and input energy[J].Earthquake Engineering and Structural Dynamics,1994,23(5):523-537.
[15]程光煜,叶列平.弹塑性SDOF系统累积滞洄谱[J].工程抗震与加固改造,2007,29(2):1-7.CHENG Guang-yu,YE Lie-ping.Cumulative hysteretic energy spectra of SDOF systems[J].Earthquake Resistant Engineering and Retrofitting,2007,29(2):1-7.
[2]Akiyama H.Earthquake resistant limit state design forbuildings[M].University of Tokyo Press,1985.
[3]Benavent-Climent A,Lopez-Almansa F,Bravo-Gonzalez D A.Design energy input spectra for moderate-to-high seismicityregions based on Colombian earthquakes[J].Soil Dynamicsand Earthquake Engineering,2010,30:1129-1148.
[4]Amiri G G,Darzi G A,Amiri J V.Design elastic inputenergy spectra based on Iranian earthquakes[J].CanadianJournal of Civil Engineering,2008,35(6):635 646.
[5]Teng J,Dong Z J.Research on energy spectrum of elasticSDOF[C]//The 14th World Conference on EarthquakeEngineering.China:Beijing,2008.
[6]程光煜,叶列平.弹塑性SDOF系统的地震输入能量谱[J].工程力学,2008,25(2):28-39.CHENG Guang-yu,YE Lie-ping.Earthquake input energyspectrum for inelastic SDOF systems[J].EngineeringMechanics,2008,25(2):28-39.
[7]李春锋,张旸.长周期地震动衰减关系研究的迫切性[J].地震地磁观测与研究,2006,27(3):1-8.LI Chun-feng,ZHANG Yang.Urgency of the study of long-period ground motion[J].Seismological and GeomagneticObservation and Research,2006,27(3):1-8.
[8]Uang C M,Bertero V V.Evaluation of seismic energy instructures[J].Earthquake Engineering and StructuralDynamics,1990,19(1):77-99.
[9]胡灿阳,陈清军.基于EMD和最小二乘法的基线漂移研究[J].振动与冲击,2010,29(3):162-167.HU Can-yang,CHEN Qing-jun.Research on baseline driftusing least-square and EMD[J].Journal of Vibration andShock,2010,29(3):162-167.
[10]周雍年,周正华,于海英.设计反应谱长周期段的研究[J].地震工程与工程振动,2004,24(2):15-18.ZHOU Yong-nian,ZHOU Zheng-hua,YU Hai-ying.A study on long period portion of design spectra[J].Earthquake Engineering and Engineering Vibration,2004,24(2):15-18.
[11]Trifunac M,Brady A.A study on the duration of strong earthquake ground motion[J].Bulletin of the Seismological Society of America,1975,65(3):581-626.
[12]Decanini L D,Mollaioli F.Formulation of elastic earthquake input energy spectra[J].Earthquake Engineering and Structural Dynamics,1998,27(12):1503-1522.
[13]Akiyama H.Earthquake-resistant design method for buildings based on energy balance[M].Gihoudou Syuppan Press,1999.
[14]Fajfar P,Vidic T.Consistent inelastic design spectra hysteretic and input energy[J].Earthquake Engineering and Structural Dynamics,1994,23(5):523-537.
[15]程光煜,叶列平.弹塑性SDOF系统累积滞洄谱[J].工程抗震与加固改造,2007,29(2):1-7.CHENG Guang-yu,YE Lie-ping.Cumulative hysteretic energy spectra of SDOF systems[J].Earthquake Resistant Engineering and Retrofitting,2007,29(2):1-7.
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