集集地震中场地条件对地震动特性的影响
|
摘要
文中将921台湾集集地震主震的404组强震记录按照不同震中距和场地类别分组,对加速度水平分量和垂直分量的持时、峰值加速度(PGA)、包络线、反应谱比值进行了统计分析。结果表明,场地条件对不同分量加速度时间历程的若干特征有显著的影响,而且比较复杂。此外,断层方向对地震动水平特性也有一定的影响。具体研究结果为:1)地震动水平分量的持时随着场地依次变软而增大;2)断层方向对PGA衰减特征有一定影响;3)不同震中距离和场地条件下集散的时间里程的包线基本上都是单峰点的时间函数;地震动加速度水平分量包络线与竖向分量包络线有明显的不同;4)在震中距相同的条件下,场地愈软弱,周期愈短,谱比值EW/SN愈接近1。场地愈软,在短周期(<0.1s)段,V/H谱比值是变大的趋势,而在长周期(>特征周期)段则是变小的趋势;而且相对来说V/EW谱比值随场地变软而减小的趋势相对要强一些。
According to the epicenter distance and the site classification, the 404 groups of earthquake recordings of the main shock of Chi-Chi, Taiwan, China earthquake in 1999 are sorted out in this paper. Based on these data, we analyze the statistic features of duration, PGA, envelopes and response spectra ratio of horizontal and vertical component of the acceleration recordings. The results of analyses show that the effect of site classification on characteristics of various components in acceleration time history is obvious; furthermore, fault direction also has certain effects on the characteristics of horizontal component of ground motion acceleration. The detailed research results are: 1) the duration of horizontal component of acceleration records increases with the softening of site; 2) the direction of fault slip has some effects on PGA's attenuation features; 3) the average envelopes of acceleration records at different distances and site class basically are single peak functions of time and the envelopes of horizontal and vertical components of ground motion are obviously different; 4) with the same epicenter distance, EW/SN response spectrum ratios tend to approximate to 1.0 as site becomes softer and period shorter. V/H response spectrum ratios in short periods (<0.1s) increase with the softening of site, however, V/H ratios within long-period range (>characteristic period) decrease with the softening of site, and the decrease of V/EW ratio speeds up relatively.
According to the epicenter distance and the site classification, the 404 groups of earthquake recordings of the main shock of Chi-Chi, Taiwan, China earthquake in 1999 are sorted out in this paper. Based on these data, we analyze the statistic features of duration, PGA, envelopes and response spectra ratio of horizontal and vertical component of the acceleration recordings. The results of analyses show that the effect of site classification on characteristics of various components in acceleration time history is obvious; furthermore, fault direction also has certain effects on the characteristics of horizontal component of ground motion acceleration. The detailed research results are: 1) the duration of horizontal component of acceleration records increases with the softening of site; 2) the direction of fault slip has some effects on PGA's attenuation features; 3) the average envelopes of acceleration records at different distances and site class basically are single peak functions of time and the envelopes of horizontal and vertical components of ground motion are obviously different; 4) with the same epicenter distance, EW/SN response spectrum ratios tend to approximate to 1.0 as site becomes softer and period shorter. V/H response spectrum ratios in short periods (<0.1s) increase with the softening of site, however, V/H ratios within long-period range (>characteristic period) decrease with the softening of site, and the decrease of V/EW ratio speeds up relatively.
引文
胡聿贤,孙平善,章在墉,等.1980.场地条件对震害和地震动的影响[J].地震工程与工程振动,1(1):41—54.HUYuxian,SUNPingshan,ZHANGZaiyong,etal.1980.Effectsofsiteconditiononseismicdisasterandearthquakegroundmotion[J].EarthquakeEngineeringandEngineeringVibration,1(1):41—54(inChinese).
胡聿贤.1988.地震工程学[M].北京:地震出版社.172.HUYuxian.1988.Earthquakeengineering[M].Seismologicalpress,Beijing.172(inChinese).
李小军,彭青.2001.不同类别场地地震动参数的计算分析[J].地震工程与工程振动,21(1):29—36.LIXiaojun,PENGQing.2001.Calculationandanalysisofearthquakegroundmotionparametersfordifferentsitecategories[J].EarthquakeEngineeringandEngineeringVibration,21(1):29—36(inChinese).
李小军,彭青,刘文忠.2001.设计地震动参数确定中的场地影响考虑[J].世界地震工程,17(4):34—41.LIXiaojun,PENGQing,LIUWenzhong.2001.Considerationofsiteeffectfordeterminationofdesignearthquakegroundmotionparameters[J].WorldInformationonEarthquakeEngineering,17(4):34—41(inChinese).
倪永军,朱唏.2004.近断层地震的加速度峰值比和反应谱分析[J].北方交通大学学报,28(4):1—5.NIYongjun,ZHUXi.2004.AnalysisofAccelerationPeakRatiosandResponseSpectraforNearFaultEarthquakes[J].JournalofNorthernJiaoTongUniversity,28(4):1—5(inChinese).
石树中,沈建文,楼梦麟.2002.基岩场地强地面运动加速度反应谱统计特征[J].同济大学学报,30(11):1300—1304.SHIShuzhong,SHENJianwen,LOUMenglin.2002.StatisticFeaturesofResponseSpectraofAccelerationStrongGroundMotionatRockSites[J].JournalofTongJiUniversity,30(11):1300—1304(inChinese).
施伟华,崔建文,包一峰,等.2003.姚安6.5级地震场地与震害的关系[J].地震研究,26(1):86—91.SHIWeihua,CUIJianwen,BAOYifeng,etal.2003.TheRelationsbetweenSiteandSeismicDisastersforYao’anM6.5Earthquake[J].Seismologicalresearch,26(1):86—91(inChinese).
施伟华,崔建文,吕明.2002.施甸5.9级地震场地与震害的关系[J].地震研究,25(3):295—301.SHIWeihua,CUIJianwen,LUMing,etal.2002.TheRelationsbetweenSiteandSeismicDisastersforShiDianM5.9Earthquake[J].Seismologicalresearch,25(3):295—301(inChinese).
王国权,周锡元,马宗晋,等.2000.921台湾地震近断层强地面运动反应谱与规范设计谱的对比研究[J].工程抗震,(增刊):1—10.WANGGuoquan,ZHOUXiyuan,MAZongjin,etal.2000.Thecontrastresearchofresponsespectrumandcodefordesignspectrumofnearfaultgroundmotioncausedbythe1999,ChiChi,Taiwan,earthquake[J].Earthquakeresistantengineering,(Suppl):1—10(inChinese).
周锡元.1965.土质条件对建筑物所受地震荷载的影响[A].见:中国科学院工程力学研究所地震工程研究报告集(第二集).北京:科学出版社.ZHOUXiyuan.1965.Effectofsoilconditiononconstructionsubjectedtoseismicload[A].In:InstituteofEngineeringMechanics,ChinaEarthquakeAdministration(2).Earthquakeengineeringresearchreports(thesecondvolume).SciencePress,Beijing(inChinese).
周锡元,王广军,苏经宇.1991.场地·地基·设计地震[M].北京:地震出版社.ZHOUXiyuan,WANGGuangjun,SUJingyu.1991.Site·Groundsill·DesignEarthquake[M].Seismologicalpress,Beijing(inChinese).
周正华,周雍年,赵刚.2002.强震近场加速度峰值比和反应谱统计分析[J].地震工程与工程振动,22(3):15—18.ZHOUZhenghua,ZHOUYongnian,ZHAOGang.2002.Statisticalanalysisofpeakratiosandresponsespectraofnearfieldaccelerograms[J].EarthquakeEngineeringandEngineeringVibration,22(3):15—18(inChinese).
周正华,周雍年,卢滔,等.2003.竖向地震动特性研究[J].地震工程与工程振动,23(3):25—29.ZHOUZhenghua,ZHOUYongnian,LUTao.2003.Studyoncharacteristicsofverticalgroundmotion[J].EarthquakeEngineeringandEngineeringVibration,23(3):25—29(inChinese).
中华人民共和国建设部主编.2001.中华人民共和国国家标准建筑抗震设计规范(GB50011$C2001)[S].北京:中国建筑工业出版社.28.MinistryofConstructionP.R.China(ed).2001.ThestandardCodeforseismicdesignofbuildingofP.R.China(GB50011-2001)[S].Chinaarchitecture&buildingpress,Beijing.28(inChinese).
ZolloA,AntonioEmolo,AndreHerrero,etal.1999.HighfrequencystronggroundmotionmodelingintheCataniaarea[J].JournalofSeismology,3(3):279—288.
AhmedElgamal,LiangcaiHE.2004.VerticalEarthquakeGroundMotionRecords:anOverview[J].JournalofEarthquakeEngineering,8(5):663—697.
DravinskiM,DingG,BiswasNN.2003.SiteAmplificationFactorinAnchorage,AlaskaBasedonLongPeriodMicrotremors[J].JournalofEarthquakeEngineering,7(4):555—571.
TrifunacMD.1987.InfluenceofLocalSoilandGeologicalSiteConditionsonFourierSpectrumAmplitudesofRecordedStrongMotionAccelerations[R].UniversityofSouthernCaliforniaDepartmentofCivilEngineering,ReportNo.CE87—04,273.
WangGuoQuan,ZhouXiYuan,MaZongJin,etal.2001.APreliminaryStudyontheRandomnessofResponseSpectraofthe1999ChiChi,Taiwan,EarthquakeandDataFilesfrom“APreliminaryStudyontheStochasticCharacteristicsofResponseSpectraofthe1999ChiChi,Taiwan,Earthquake”[J].BulletinoftheSeismologicalSocietyofAmericaSpecialIssue:ChiChi,Taiwan,BSSA,91(5):1358—1369.
WangGQ,ZhouXY,ZhangPZ,etal.2002.Characteristicofamplitudeanddurationfornearfaultstronggroundmotionfromthe1999ChiChi,TaiwanEarthquake[J].SoildynamicsandEarthquakeengineering,22(1):73—96.
LeeCT,ChengCT,LiaoCW,etal.2001.SiteclassificationofTaiwanfreefieldstrongmotionstations[J].BullSeismSocAm,91(5):1283—1297.
RichterCF.1958.ElementarySeismology[M].SanFrancisco:W.H.FreemanandCo.
胡聿贤.1988.地震工程学[M].北京:地震出版社.172.HUYuxian.1988.Earthquakeengineering[M].Seismologicalpress,Beijing.172(inChinese).
李小军,彭青.2001.不同类别场地地震动参数的计算分析[J].地震工程与工程振动,21(1):29—36.LIXiaojun,PENGQing.2001.Calculationandanalysisofearthquakegroundmotionparametersfordifferentsitecategories[J].EarthquakeEngineeringandEngineeringVibration,21(1):29—36(inChinese).
李小军,彭青,刘文忠.2001.设计地震动参数确定中的场地影响考虑[J].世界地震工程,17(4):34—41.LIXiaojun,PENGQing,LIUWenzhong.2001.Considerationofsiteeffectfordeterminationofdesignearthquakegroundmotionparameters[J].WorldInformationonEarthquakeEngineering,17(4):34—41(inChinese).
倪永军,朱唏.2004.近断层地震的加速度峰值比和反应谱分析[J].北方交通大学学报,28(4):1—5.NIYongjun,ZHUXi.2004.AnalysisofAccelerationPeakRatiosandResponseSpectraforNearFaultEarthquakes[J].JournalofNorthernJiaoTongUniversity,28(4):1—5(inChinese).
石树中,沈建文,楼梦麟.2002.基岩场地强地面运动加速度反应谱统计特征[J].同济大学学报,30(11):1300—1304.SHIShuzhong,SHENJianwen,LOUMenglin.2002.StatisticFeaturesofResponseSpectraofAccelerationStrongGroundMotionatRockSites[J].JournalofTongJiUniversity,30(11):1300—1304(inChinese).
施伟华,崔建文,包一峰,等.2003.姚安6.5级地震场地与震害的关系[J].地震研究,26(1):86—91.SHIWeihua,CUIJianwen,BAOYifeng,etal.2003.TheRelationsbetweenSiteandSeismicDisastersforYao’anM6.5Earthquake[J].Seismologicalresearch,26(1):86—91(inChinese).
施伟华,崔建文,吕明.2002.施甸5.9级地震场地与震害的关系[J].地震研究,25(3):295—301.SHIWeihua,CUIJianwen,LUMing,etal.2002.TheRelationsbetweenSiteandSeismicDisastersforShiDianM5.9Earthquake[J].Seismologicalresearch,25(3):295—301(inChinese).
王国权,周锡元,马宗晋,等.2000.921台湾地震近断层强地面运动反应谱与规范设计谱的对比研究[J].工程抗震,(增刊):1—10.WANGGuoquan,ZHOUXiyuan,MAZongjin,etal.2000.Thecontrastresearchofresponsespectrumandcodefordesignspectrumofnearfaultgroundmotioncausedbythe1999,ChiChi,Taiwan,earthquake[J].Earthquakeresistantengineering,(Suppl):1—10(inChinese).
周锡元.1965.土质条件对建筑物所受地震荷载的影响[A].见:中国科学院工程力学研究所地震工程研究报告集(第二集).北京:科学出版社.ZHOUXiyuan.1965.Effectofsoilconditiononconstructionsubjectedtoseismicload[A].In:InstituteofEngineeringMechanics,ChinaEarthquakeAdministration(2).Earthquakeengineeringresearchreports(thesecondvolume).SciencePress,Beijing(inChinese).
周锡元,王广军,苏经宇.1991.场地·地基·设计地震[M].北京:地震出版社.ZHOUXiyuan,WANGGuangjun,SUJingyu.1991.Site·Groundsill·DesignEarthquake[M].Seismologicalpress,Beijing(inChinese).
周正华,周雍年,赵刚.2002.强震近场加速度峰值比和反应谱统计分析[J].地震工程与工程振动,22(3):15—18.ZHOUZhenghua,ZHOUYongnian,ZHAOGang.2002.Statisticalanalysisofpeakratiosandresponsespectraofnearfieldaccelerograms[J].EarthquakeEngineeringandEngineeringVibration,22(3):15—18(inChinese).
周正华,周雍年,卢滔,等.2003.竖向地震动特性研究[J].地震工程与工程振动,23(3):25—29.ZHOUZhenghua,ZHOUYongnian,LUTao.2003.Studyoncharacteristicsofverticalgroundmotion[J].EarthquakeEngineeringandEngineeringVibration,23(3):25—29(inChinese).
中华人民共和国建设部主编.2001.中华人民共和国国家标准建筑抗震设计规范(GB50011$C2001)[S].北京:中国建筑工业出版社.28.MinistryofConstructionP.R.China(ed).2001.ThestandardCodeforseismicdesignofbuildingofP.R.China(GB50011-2001)[S].Chinaarchitecture&buildingpress,Beijing.28(inChinese).
ZolloA,AntonioEmolo,AndreHerrero,etal.1999.HighfrequencystronggroundmotionmodelingintheCataniaarea[J].JournalofSeismology,3(3):279—288.
AhmedElgamal,LiangcaiHE.2004.VerticalEarthquakeGroundMotionRecords:anOverview[J].JournalofEarthquakeEngineering,8(5):663—697.
DravinskiM,DingG,BiswasNN.2003.SiteAmplificationFactorinAnchorage,AlaskaBasedonLongPeriodMicrotremors[J].JournalofEarthquakeEngineering,7(4):555—571.
TrifunacMD.1987.InfluenceofLocalSoilandGeologicalSiteConditionsonFourierSpectrumAmplitudesofRecordedStrongMotionAccelerations[R].UniversityofSouthernCaliforniaDepartmentofCivilEngineering,ReportNo.CE87—04,273.
WangGuoQuan,ZhouXiYuan,MaZongJin,etal.2001.APreliminaryStudyontheRandomnessofResponseSpectraofthe1999ChiChi,Taiwan,EarthquakeandDataFilesfrom“APreliminaryStudyontheStochasticCharacteristicsofResponseSpectraofthe1999ChiChi,Taiwan,Earthquake”[J].BulletinoftheSeismologicalSocietyofAmericaSpecialIssue:ChiChi,Taiwan,BSSA,91(5):1358—1369.
WangGQ,ZhouXY,ZhangPZ,etal.2002.Characteristicofamplitudeanddurationfornearfaultstronggroundmotionfromthe1999ChiChi,TaiwanEarthquake[J].SoildynamicsandEarthquakeengineering,22(1):73—96.
LeeCT,ChengCT,LiaoCW,etal.2001.SiteclassificationofTaiwanfreefieldstrongmotionstations[J].BullSeismSocAm,91(5):1283—1297.
RichterCF.1958.ElementarySeismology[M].SanFrancisco:W.H.FreemanandCo.
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