基于位移模式的能力谱法结构抗震性能评估
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摘要
能力谱法是结构非线性静力分析的主要方法,阐述了能力谱法的基本原理,提出了基于位移模式的Pushover方法,并用该方法计算结构的能力曲线;分析了等效单自由度方法和等价线性化方法,建立基于位移模式的等效单自由度体系,基于位移模式对结构进行往复Pushover分析得到等效体系的参数,对结构进行抗震性能评估,并通过算例验证本文所提出方法的可靠性,计算结果较好地反应了结构的非线性行为.
Capacity spectrum method is the primary method for nonlinear static analysis and the basic principles of this method are introduced in this paper.The displacement-pattern-based pushover method is proposed and the capacity curve of structure is obtained by this method.The equivalent single-degree-of-freedom method and equivalent linearization method is analyzed and MDOF system is converted into equivalent SDOF system.Based on the reciprocating pushover,equivalent system parameters are obtained and the seismic performance of the structure is evaluated.The displacement response of structure can be determinate by elastic demand spectrum.A practical example of frame structure is used to validate this methodology.The results can reflect the nonlinear behavior of the structure.
Capacity spectrum method is the primary method for nonlinear static analysis and the basic principles of this method are introduced in this paper.The displacement-pattern-based pushover method is proposed and the capacity curve of structure is obtained by this method.The equivalent single-degree-of-freedom method and equivalent linearization method is analyzed and MDOF system is converted into equivalent SDOF system.Based on the reciprocating pushover,equivalent system parameters are obtained and the seismic performance of the structure is evaluated.The displacement response of structure can be determinate by elastic demand spectrum.A practical example of frame structure is used to validate this methodology.The results can reflect the nonlinear behavior of the structure.
引文
[1]SEAOC Vision 2000Committee,Performance-based Seismic Engineering[R].Report Prepared by Structural En-gineering Association of California,Sacramento,California,U.S.A,1995.
[2]ATC-40.Seismic evaluation and retrofit of concrete buildings[R].Applied Technology Council.Red Wood City,California,1996.
[3]BERTEROV V.State-of-the-art Report on Design Criteria[C].Proc.11th World Conf.Earthquake Engineering.Mexicon,Paper No.2005.
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[6]FAJFAR Peter.Capacity Spectrum Method Based on Demand Spectra[J].Earthquake Engineering and StructuralDynamics,1999,28:979-993.
[7]叶列平.基于性能/位移的能力-需求曲线设计方法[J].工程抗震与加固改造,2009,31(3):50-55.YE Lie-ping.Capacity-Demand Curves Method for Performance/Displacement-based Seismic Design[J].EarthquakeResistant Engineering and Retrofitting,2009,31(3):50-55.
[8]夏修身,王常峰.钢筋混凝土桥墩基于性能的抗震设计研究[J].西安建筑科技大学学报:自然科学版,2010,42(2):295-299.XIA Xiu-shen,WANG Chang-feng.Performance-based aseismic design for RC bridge piers[J].J.Xi′an Univ.ofArch.&Tech.:Natural Science Edition 2010,42(2):295-299.
[9]何浩祥,李宏男.基于规范弹性反应谱建立需求谱的方法[J].世界地震工程,2002,18(3):59-63.HE Hao-xing,LI Hong-nan.A method for establishing demand spectra based on elastic spectra of seismic designcode for buildings[J].World Earthquake Engineering,2002,18(3):59-63.
[10]王威,孙景江.基于改进能力谱方法的位移反应估计[J].地震工程与工程振动,2003,23(6):37-43.WANG Wei,SUN Jing-jiang.Estimation of Displacement Response Based on Improved Capacity Spectrum Meth-od[J].Earthquake Engineering and Engineering Vibration,2003,23(6):37-43.
[11]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(Push-over)方法的改进[J].建筑结构学报,2000,21(1):44-51.YANG Pu,LI Ying-min,WANG Ya-yong,et al.A Study on Improvement of Push-over Analysis[J].Journal ofBuilding Structures.2000,21(1):44-51.
[12]李琪,顾荣蓉.基于位移的抗震设计中位移模式的确定[J].扬州大学学报,2005,8(2):65-69.LI Qi,GU Rong-rong.Definition Method of Displacement-mode in Displacement-based Seismic Design[J].Journalof Yangzhou University,2005,8(2):65-69.
[2]ATC-40.Seismic evaluation and retrofit of concrete buildings[R].Applied Technology Council.Red Wood City,California,1996.
[3]BERTEROV V.State-of-the-art Report on Design Criteria[C].Proc.11th World Conf.Earthquake Engineering.Mexicon,Paper No.2005.
[4]FREEMAN Sigmund A.Evaluations of Existing Buildings for Seismic Risk-A Case Study of Puget Sound NavalShipyard Bremerton[C].Washington Proceedings of the U.S.National Conference on Earthquake Engineers,EE-RI,Berkeley,1975:113-122.
[5]FREEMAN Sigmund A.Development and Use of Capacity Spectrum Method[C].6th U.S.National Conferenceon Earthquake Engineering,1998.
[6]FAJFAR Peter.Capacity Spectrum Method Based on Demand Spectra[J].Earthquake Engineering and StructuralDynamics,1999,28:979-993.
[7]叶列平.基于性能/位移的能力-需求曲线设计方法[J].工程抗震与加固改造,2009,31(3):50-55.YE Lie-ping.Capacity-Demand Curves Method for Performance/Displacement-based Seismic Design[J].EarthquakeResistant Engineering and Retrofitting,2009,31(3):50-55.
[8]夏修身,王常峰.钢筋混凝土桥墩基于性能的抗震设计研究[J].西安建筑科技大学学报:自然科学版,2010,42(2):295-299.XIA Xiu-shen,WANG Chang-feng.Performance-based aseismic design for RC bridge piers[J].J.Xi′an Univ.ofArch.&Tech.:Natural Science Edition 2010,42(2):295-299.
[9]何浩祥,李宏男.基于规范弹性反应谱建立需求谱的方法[J].世界地震工程,2002,18(3):59-63.HE Hao-xing,LI Hong-nan.A method for establishing demand spectra based on elastic spectra of seismic designcode for buildings[J].World Earthquake Engineering,2002,18(3):59-63.
[10]王威,孙景江.基于改进能力谱方法的位移反应估计[J].地震工程与工程振动,2003,23(6):37-43.WANG Wei,SUN Jing-jiang.Estimation of Displacement Response Based on Improved Capacity Spectrum Meth-od[J].Earthquake Engineering and Engineering Vibration,2003,23(6):37-43.
[11]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(Push-over)方法的改进[J].建筑结构学报,2000,21(1):44-51.YANG Pu,LI Ying-min,WANG Ya-yong,et al.A Study on Improvement of Push-over Analysis[J].Journal ofBuilding Structures.2000,21(1):44-51.
[12]李琪,顾荣蓉.基于位移的抗震设计中位移模式的确定[J].扬州大学学报,2005,8(2):65-69.LI Qi,GU Rong-rong.Definition Method of Displacement-mode in Displacement-based Seismic Design[J].Journalof Yangzhou University,2005,8(2):65-69.
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