能力谱与侧向荷载分布模式的关系
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摘要
根据结构动力学理论证明了能力谱曲线的确定与侧向荷载分布模式间存在对应关系,指出对于不同的侧向荷载模式,应采用不同的能力谱曲线转化公式并给出了具体的表达式.分别采用本文方法、传统方法和弹塑性时程分析对一个六层钢筋混凝土框架结构进行了计算,证明了本文方法计算精度更高.利用该方法,采用多种侧向荷载模式对结构进行静力弹塑性分析,能将侧向位移反应可能范围限定得更小,使人们把握实际地震反应大小的准确性得以提高.
Based on the structural dynamic theory,the relationship between capacity spectra and lateral load patterns was demonstrated.It was pointed out that different formulae of capacity spectrum curves should be used for different lateral load patterns and the formulas were given.A six-story reinforced concrete frame structure was designed and analyzed using the proposed method,the classical method and the time history analysis method respectively.The result shows that the proposed method is more accurate.Using the proposed method and the different lateral load patterns the seismic response can be bounded within a narrower scope,which will help to know the seismic response more accurately.
Based on the structural dynamic theory,the relationship between capacity spectra and lateral load patterns was demonstrated.It was pointed out that different formulae of capacity spectrum curves should be used for different lateral load patterns and the formulas were given.A six-story reinforced concrete frame structure was designed and analyzed using the proposed method,the classical method and the time history analysis method respectively.The result shows that the proposed method is more accurate.Using the proposed method and the different lateral load patterns the seismic response can be bounded within a narrower scope,which will help to know the seismic response more accurately.
引文
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[2]ATC.Seismic Evaluation and Retrofit of Concrete Buildings.Redwood City(CA):Applied Technology Council,1996
[3]NEHRP Guidelines for the Seismic Rehabilitation of Buildings.Washington D C:Federal Emergency Management Agency,1997,FEMA273
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[5]Fajfar P.Capacity spectrum method based on inelastic demand spectra.Earthquake Eng Struct Dyn,1999,28(4):970
[6]Chopra A K,Rakesh K G.Capacity-demand-diagram Methods for Estimating Seismic Deformation of Inelastic Structures:SDFsystems.UCB:PEER,1999,PEER1999/02
[7]Wang W,Sun J J.Estimation of displacement response based on improved capacity spectrum method.Earthquake Eng Eng Vib,2003,23(6):37(王威,孙景江.基于改进能力谱方法的位移反应估计.地震工程与工程振动,2003,23(6):37)
[8]Miranda E,Bertero V,Eeri M.Evaluation of strength reduction factors for earthquake resistant design.Earthquake Spectra,1994,10(2):357
[9]Lu X L,Zhou D S.Ductility demand spectra and inelastic dis-placement spectra considering soil conditions and design character-istic periods.Earthquake Eng Eng Vib,2004,24(1):39(吕西林,周定松.考虑场地类别与设计分组的延性需求谱和弹塑性位移反应谱.地震工程与工程振动,2004,24(1):39)
[10]Prestandard and Commentary for Seismic Rehabilitation of Buildings.Washington D C:Federal Emergency Management Agency,2000,FEMA-356
[11]Valles R E,Reinhorn A M,Kunnath S K C,et al.IDARC2D Version4.0:A Programfor the Inelastic Damage Analysis of Buildings.NY:NCEER,1996,NCEER-96-0010
[12]Lee D G.Accurate and Simplified Models for Seismic Response Prediction ofSteel Frame Structures[Dissertation].California:Stanford University,1984
[13]Sun J J,Tetsuro O,Zhao Y G,et al.Lateral load pattern in pushover analysis.Earthquake Eng Eng Vib,2003,2(1):99
[2]ATC.Seismic Evaluation and Retrofit of Concrete Buildings.Redwood City(CA):Applied Technology Council,1996
[3]NEHRP Guidelines for the Seismic Rehabilitation of Buildings.Washington D C:Federal Emergency Management Agency,1997,FEMA273
[4]Lee D G,Choi WH,Cheong M C,et al.Evaluation of seismic performance of multistory building structures based onthe equiva-lent responses.Eng Struct,2006,28(2):837
[5]Fajfar P.Capacity spectrum method based on inelastic demand spectra.Earthquake Eng Struct Dyn,1999,28(4):970
[6]Chopra A K,Rakesh K G.Capacity-demand-diagram Methods for Estimating Seismic Deformation of Inelastic Structures:SDFsystems.UCB:PEER,1999,PEER1999/02
[7]Wang W,Sun J J.Estimation of displacement response based on improved capacity spectrum method.Earthquake Eng Eng Vib,2003,23(6):37(王威,孙景江.基于改进能力谱方法的位移反应估计.地震工程与工程振动,2003,23(6):37)
[8]Miranda E,Bertero V,Eeri M.Evaluation of strength reduction factors for earthquake resistant design.Earthquake Spectra,1994,10(2):357
[9]Lu X L,Zhou D S.Ductility demand spectra and inelastic dis-placement spectra considering soil conditions and design character-istic periods.Earthquake Eng Eng Vib,2004,24(1):39(吕西林,周定松.考虑场地类别与设计分组的延性需求谱和弹塑性位移反应谱.地震工程与工程振动,2004,24(1):39)
[10]Prestandard and Commentary for Seismic Rehabilitation of Buildings.Washington D C:Federal Emergency Management Agency,2000,FEMA-356
[11]Valles R E,Reinhorn A M,Kunnath S K C,et al.IDARC2D Version4.0:A Programfor the Inelastic Damage Analysis of Buildings.NY:NCEER,1996,NCEER-96-0010
[12]Lee D G.Accurate and Simplified Models for Seismic Response Prediction ofSteel Frame Structures[Dissertation].California:Stanford University,1984
[13]Sun J J,Tetsuro O,Zhao Y G,et al.Lateral load pattern in pushover analysis.Earthquake Eng Eng Vib,2003,2(1):99
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