工程结构等延性地震抗力谱研究
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摘要
研究结构的非弹性反应谱对改进现有的结构抗震设计、发展基于性态的抗震设计以及了解复杂地面运动特性与结构动力特性之间的关系具有重要的意义。利用大量的单自由度在强震记录作用下的弹塑性动力时程分析,对等延性地震抗力谱这一重要的非弹性反应谱进行了较为详尽的研究,给出了四类场地条件(基岩、硬土、一般土和软土)下的平均等延性地震抗力谱,总结了对工程结构的抗震设计和研究具有实际意义的规律和特征,并分析了场地条件、结构的延性系数以及周期等对等延性地震抗力谱的影响,提出了新的拟合公式,其成果可供抗震研究和设计直接应用。
It is significant for improving the seismic analysis level, developing the performance-based seismic design (PBSD) and understanding the relation between the ground motion characteristics and the structure dynamic characteristics to study the inelastic response spectra. Based on a great deal of nonlinear time-history for SDOF system, investigation of seismic resistance spectra of constant ductility used for seismic design of structures is carried out in this paper. The mean seismic resistance spectra of constant ductility corresponding to four classifications of site conditions are presented. The main characteristics, which are important for the seismic design and research, are also given. Influence analysis of site condition, ductility ratio and period of structures on seismic resistance spectra of constant ductility is discussed. An investigation of the influence of structure damping and hysteretic model on the spectra used for seismic design of structures is presented in another paper. At the end, new fitting expressions of seismic resistance spectra of constant ductility corresponding to four classifications of site conditions are proposed. The results are suitable for the current seismic design and research of structures.
It is significant for improving the seismic analysis level, developing the performance-based seismic design (PBSD) and understanding the relation between the ground motion characteristics and the structure dynamic characteristics to study the inelastic response spectra. Based on a great deal of nonlinear time-history for SDOF system, investigation of seismic resistance spectra of constant ductility used for seismic design of structures is carried out in this paper. The mean seismic resistance spectra of constant ductility corresponding to four classifications of site conditions are presented. The main characteristics, which are important for the seismic design and research, are also given. Influence analysis of site condition, ductility ratio and period of structures on seismic resistance spectra of constant ductility is discussed. An investigation of the influence of structure damping and hysteretic model on the spectra used for seismic design of structures is presented in another paper. At the end, new fitting expressions of seismic resistance spectra of constant ductility corresponding to four classifications of site conditions are proposed. The results are suitable for the current seismic design and research of structures.
引文
[1] 翟长海,谢礼立,张敏政.非弹性设计反应谱研究[R].科技部社会公益研究专项基金(2001DIB20098)研究报告,2003年3月.
[2] EduadoMirandaandV.Bertero,EvaluationofStrengthReductionFactorsforEarthquake-ResistantDesign[J].EarthquakeSpectra,Vol.10,No.2,1994:123-131.
[3] ATC.Structuralresponsemodificationfactors[R].ATC-19Report,AppliedTechnologyCouncil,California,1995.
[4] A.J.Kappos.Evaluationofbehaviorfactorsonthebasisofductilityandover-strengthstudies[J].EngineeringStructures,Vol.21.1999:823-835.
[5] A.M.Mwafy,A.S.Elnashai.CalibrationofforcereductionfactorsofRCBuildings[J].JournalofStructureEngineering,ASCE,Vol.6,No.2,2002:239-273.
[6] AndrewWhittaker,MichaelConstantinousandPanosTsopelas.DisplacementEstimatesforperformance-basedseismicdesign[J].JournalofStructureEngineering,ASCE,Vol.10,No.8,1998:905-912.
[7] B.Borzi,G.M.Calvi,A.S.ElnashaiandJ.J.Bommer.Inelasticspectrafordisplacement-basedseismicdesign[J].SoilDynamicsandEarthquakeEngineering,Vol.26.2001:47-61.
[8] 卓卫东,范立础.结构抗震设计中的强度折减系数研究[J].地震工程与工程振动,Vol.21,No.1,2001:84-88.
[9] XiZhu,YongjunNi.Strengthreductionfactorspectrabasedonstructuraldamageperformance[A].SymposiumonEarthquakeEngineering;publishedin"EarthquakeEngineeringFrontiersintheNewMillennium"(ProceedingsoftheChina-U.S.A.MillenniumSymposiumonEarthquakeEngineering[C],2000,Beijing,China),EditedbySpencer＆Hu,2001.
[10] Y.H.Lee,S.W.HanandY.H.Oh.Determinationofductilityfactorconsideringdifferenthystereticmodels[J].EarthquakeEngineeringandStructuralDynamics,Vol.28,1999:957-977.
[11] GB0011-2001,建筑抗震设计规范[S],中建筑工业出版社,2001.
[12] FederalEmergencyManagementAgency.NEHRPprovisionsfortheseismicrehabilitationofbuildings[R].ReportFEMA273(Guidelines)and274(Commentary),Washington,D.C.,1997.
[13] Miranda,E.,Site-dependentstrength-reductionfactors[J],JStrc.Eng.,ASCE,,Vol.119,No.12,1993:3503-3519.
[14] Nasar,Krawinker.SeismicdemandsforSDOFandMDOFsystem[R].ReportNo.95,TheJohnA.BlumeEarthquakeengineeringcenter,StanfordUniversity,Stanford,California,1991.
[2] EduadoMirandaandV.Bertero,EvaluationofStrengthReductionFactorsforEarthquake-ResistantDesign[J].EarthquakeSpectra,Vol.10,No.2,1994:123-131.
[3] ATC.Structuralresponsemodificationfactors[R].ATC-19Report,AppliedTechnologyCouncil,California,1995.
[4] A.J.Kappos.Evaluationofbehaviorfactorsonthebasisofductilityandover-strengthstudies[J].EngineeringStructures,Vol.21.1999:823-835.
[5] A.M.Mwafy,A.S.Elnashai.CalibrationofforcereductionfactorsofRCBuildings[J].JournalofStructureEngineering,ASCE,Vol.6,No.2,2002:239-273.
[6] AndrewWhittaker,MichaelConstantinousandPanosTsopelas.DisplacementEstimatesforperformance-basedseismicdesign[J].JournalofStructureEngineering,ASCE,Vol.10,No.8,1998:905-912.
[7] B.Borzi,G.M.Calvi,A.S.ElnashaiandJ.J.Bommer.Inelasticspectrafordisplacement-basedseismicdesign[J].SoilDynamicsandEarthquakeEngineering,Vol.26.2001:47-61.
[8] 卓卫东,范立础.结构抗震设计中的强度折减系数研究[J].地震工程与工程振动,Vol.21,No.1,2001:84-88.
[9] XiZhu,YongjunNi.Strengthreductionfactorspectrabasedonstructuraldamageperformance[A].SymposiumonEarthquakeEngineering;publishedin"EarthquakeEngineeringFrontiersintheNewMillennium"(ProceedingsoftheChina-U.S.A.MillenniumSymposiumonEarthquakeEngineering[C],2000,Beijing,China),EditedbySpencer＆Hu,2001.
[10] Y.H.Lee,S.W.HanandY.H.Oh.Determinationofductilityfactorconsideringdifferenthystereticmodels[J].EarthquakeEngineeringandStructuralDynamics,Vol.28,1999:957-977.
[11] GB0011-2001,建筑抗震设计规范[S],中建筑工业出版社,2001.
[12] FederalEmergencyManagementAgency.NEHRPprovisionsfortheseismicrehabilitationofbuildings[R].ReportFEMA273(Guidelines)and274(Commentary),Washington,D.C.,1997.
[13] Miranda,E.,Site-dependentstrength-reductionfactors[J],JStrc.Eng.,ASCE,,Vol.119,No.12,1993:3503-3519.
[14] Nasar,Krawinker.SeismicdemandsforSDOFandMDOFsystem[R].ReportNo.95,TheJohnA.BlumeEarthquakeengineeringcenter,StanfordUniversity,Stanford,California,1991.
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