用增量动力分析方法求解人字形中心支撑钢框架的结构影响系数和位移放大系数(Ⅰ)——方法
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摘要
结构影响系数是基于强度的抗震设计中确定设计地震作用的关键,也是基于性态抗震设计理论的基础。位移放大系数则是根据结构的弹性位移估算弹塑性位移的关键参数。本文采用增量动力分析方法求解结构影响系数和位移放大系数,并结合具体算例详细说明了基于增量动力分析求解结构影响系数和位移放大系数的实施步骤。该方法能反映结构的动力特征,并能考虑高阶振型对结构抗震性能的影响。
Response modification factor(R)is the key for determining the earthquake action in the seismic design based on strength,and also is the base of the performance based seismic design.Displacement amplification factor (Cd)is the critical parameter to estimate the elasto-plastic displacement based on elastic displacement of the structures.In this paper,the incremental dynamic analysis(IDA)method is introduced to calculate R and Cd ,and a specific example is adapted to explain how to compute R and Cd based on IDA.This method can reflect the dynamic feature and account for the influence of higher mode on the earthquake resistant capability of the structures.
Response modification factor(R)is the key for determining the earthquake action in the seismic design based on strength,and also is the base of the performance based seismic design.Displacement amplification factor (Cd)is the critical parameter to estimate the elasto-plastic displacement based on elastic displacement of the structures.In this paper,the incremental dynamic analysis(IDA)method is introduced to calculate R and Cd ,and a specific example is adapted to explain how to compute R and Cd based on IDA.This method can reflect the dynamic feature and account for the influence of higher mode on the earthquake resistant capability of the structures.
引文
[1]Vamvatsikos D.Seismic performance,capacity and reliability of structures as seen through incremental dynamics analysis[D].Ph D Disserta-tion,Department of Civil and Environmental Eng.,Stanford University,2002.
[2]张守斌,聂昊.增量动力分析方法及其在性能评估中的应用[J].工程建设与设计,2007(6):33-35.
[3]Vamvatsikos D,Cornell C A.Direct estimation of the seismic demand and capacity of oscillators with multi-linear static pushovers through IDA[J].Earthquake Engineering and Structural Dynamics,2006,35(9):1097-1117.
[4]Vamvatsikos D,Cornell C A.Direct estimation of seismic demand and capacity of multi-degree-of-freedom systems through incremental dynamic analysis of single-degree-of-freedom approximation[J].Journal of Structural Engineering,2005,131(4):589-599.
[5]Vamvatsikos D,Cornell C A.Applied Incremental dynamic analysis[J].Earthquake Spectra,2004,20(2):523-553.
[6]Vamvatsikos D,Cornell C A.The incremental dynamic analysis and its application to performance-based earthquake engineering[C]∥Proceed-ings of12th European Conference on Earthquake Engineering,London,2002.
[7]Vamvatsikos D.Seismic performance.capacity and reliability of structures as seen through incremental dynamic analysis[D].CA:Stanford Uni-versity,2002.
[8]邵建华.抗弯钢框架-钢板剪力墙的结构影响系数与位移放大系数研究[D].南京:河海大学,2008.
[9]Vamvatsikos D,Cornell C A.Incremental dynamic analysis[J].Earthquake Engineering and Structural Dynamics,2002,31(3):491-514.
[10]Chamey F A.Applications in incremental dynamic analysis[C]∥Proceedings of the2005Structures Congress and the2005Forensic Engineering Symposium,New York,2005.
[11]孙文林.IDA在钢框架结构弹塑性分析中的应用研究[J].山西建筑,2005,31(17):37-38.
[12]韩建平,吕西林,李慧.基于性能的地震工程研究的新进展及对结构非线性分析的要求[J].地震工程与工程振动,2007,27(4):15-23.
[13]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[14]张金海.钢结构地震作用取值的建议与分析[D].哈尔滨:哈尔滨工业大学,2005.
[15]邵志恒.X型框架-中心支撑钢框架的结构影响系数[D].苏州:苏州科技学院,2008.
[16]叶卫平,方安平,于本方,等.Origin7.0科技绘图及数据分析[M].北京:机械工业出版社,2003.
[17]杨俊芬.中心支撑钢框架的结构影响系数和位移放大系数研究[D].西安:西安建筑大学,2009.
[18]Pacific Earthquake Engineering Research Strong Motion Database[DB].Http://peer.berkeley.edu/smcat/index.html
[2]张守斌,聂昊.增量动力分析方法及其在性能评估中的应用[J].工程建设与设计,2007(6):33-35.
[3]Vamvatsikos D,Cornell C A.Direct estimation of the seismic demand and capacity of oscillators with multi-linear static pushovers through IDA[J].Earthquake Engineering and Structural Dynamics,2006,35(9):1097-1117.
[4]Vamvatsikos D,Cornell C A.Direct estimation of seismic demand and capacity of multi-degree-of-freedom systems through incremental dynamic analysis of single-degree-of-freedom approximation[J].Journal of Structural Engineering,2005,131(4):589-599.
[5]Vamvatsikos D,Cornell C A.Applied Incremental dynamic analysis[J].Earthquake Spectra,2004,20(2):523-553.
[6]Vamvatsikos D,Cornell C A.The incremental dynamic analysis and its application to performance-based earthquake engineering[C]∥Proceed-ings of12th European Conference on Earthquake Engineering,London,2002.
[7]Vamvatsikos D.Seismic performance.capacity and reliability of structures as seen through incremental dynamic analysis[D].CA:Stanford Uni-versity,2002.
[8]邵建华.抗弯钢框架-钢板剪力墙的结构影响系数与位移放大系数研究[D].南京:河海大学,2008.
[9]Vamvatsikos D,Cornell C A.Incremental dynamic analysis[J].Earthquake Engineering and Structural Dynamics,2002,31(3):491-514.
[10]Chamey F A.Applications in incremental dynamic analysis[C]∥Proceedings of the2005Structures Congress and the2005Forensic Engineering Symposium,New York,2005.
[11]孙文林.IDA在钢框架结构弹塑性分析中的应用研究[J].山西建筑,2005,31(17):37-38.
[12]韩建平,吕西林,李慧.基于性能的地震工程研究的新进展及对结构非线性分析的要求[J].地震工程与工程振动,2007,27(4):15-23.
[13]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[14]张金海.钢结构地震作用取值的建议与分析[D].哈尔滨:哈尔滨工业大学,2005.
[15]邵志恒.X型框架-中心支撑钢框架的结构影响系数[D].苏州:苏州科技学院,2008.
[16]叶卫平,方安平,于本方,等.Origin7.0科技绘图及数据分析[M].北京:机械工业出版社,2003.
[17]杨俊芬.中心支撑钢框架的结构影响系数和位移放大系数研究[D].西安:西安建筑大学,2009.
[18]Pacific Earthquake Engineering Research Strong Motion Database[DB].Http://peer.berkeley.edu/smcat/index.html
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