有速度脉冲近场地震下偏心支撑钢框架性态设计方法
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摘要
由于长周期速度脉冲的作用,近场地震会对结构产生严重的速度和位移冲击,根据5条近场地震波建立了屈服点谱(YPS)。基于屈服点谱法方法设计了一榀K型偏心支撑钢框架结构,采用pushover方法和弹塑性时程法对所设计的结构进行了地震反应分析。结果表明,结构的屈服位移基本稳定,层间侧移比满足我国现行抗震规范的要求,结构呈现理想的梁铰屈服机构,证明了对偏心支撑钢框架进行性态设计方法的可靠性。
Because of the long-period velocity pulse,the near-fault ground motion would have an intense impact on structures in the form of velocity and displacement,a total of 5 near-fault ground motion records were selected to construct the Yield Point Spectra(YPS).This paper designed a span of K-eccentrically braced steel frame based on the YPS.By the means of Pushover method and nonlinear time history method,the results showed that the yield displacement of the example was fundamentally stable,the ratio of the displacement could satisfy the deformation requirement of the seismic code of our country,and the K-EBF structure takes on the ideal progressively plastic mechanism,which proves the reliability of this new design method.
Because of the long-period velocity pulse,the near-fault ground motion would have an intense impact on structures in the form of velocity and displacement,a total of 5 near-fault ground motion records were selected to construct the Yield Point Spectra(YPS).This paper designed a span of K-eccentrically braced steel frame based on the YPS.By the means of Pushover method and nonlinear time history method,the results showed that the yield displacement of the example was fundamentally stable,the ratio of the displacement could satisfy the deformation requirement of the seismic code of our country,and the K-EBF structure takes on the ideal progressively plastic mechanism,which proves the reliability of this new design method.
引文
[1]Mark Aschheim.Seismic design based on the Yield Displacement[J].Earthquake Spectra,2002,18(4):581-600.
[2]李新乐.近断层区桥梁结构的设计地震与抗震性能分析[D].北京:北京交通大学,2004.
[3]孙国华,顾强,何若全,等.近断层地震作用下钢板剪力墙结构基于MECE谱的性态设计方法[J].建筑结构学报,2012,33(5):105-117.
[4]王二标,顾强.K型偏心支撑钢框架的结构影响系数[J].苏州科技学院学报:工程技术版,2007,20(3):10-14.
[5]申永康.钢框架-V形偏心支撑体系的结构影响系数和位移放大系数[D].南京:河海大学,2008.
[6]Shih-Ho Chao.Performance-based seismic design of EBF using target drift and yield mechanism as performance criteria[R].University of Michi-gan,College of Engineering,USA,2005.
[7]邵建中,顾强.偏心支撑钢框架基于屈服点谱的性态抗震设计(I)—方法[J].苏州科技学院学报:工程技术版,2011,24(2):15-18.
[8]Leelataviwat,Goel,Stojadinovic.Toward Performance-Based Seismic Design of Structures[J].Earthquake Spectra,1999,15(3):435-461.
[9]中国建筑科学研究院.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[10]高学奎.近场地震动输入问题的研究[J].华北科技学院学报,2005(3):80-83.
[11]邵建中,顾强.偏心支撑钢框架基于屈服点谱的性态抗震设计(Ⅱ)—算例验证[J].苏州科技学院学报:工程技术版,2011,25(3):18-22.
[2]李新乐.近断层区桥梁结构的设计地震与抗震性能分析[D].北京:北京交通大学,2004.
[3]孙国华,顾强,何若全,等.近断层地震作用下钢板剪力墙结构基于MECE谱的性态设计方法[J].建筑结构学报,2012,33(5):105-117.
[4]王二标,顾强.K型偏心支撑钢框架的结构影响系数[J].苏州科技学院学报:工程技术版,2007,20(3):10-14.
[5]申永康.钢框架-V形偏心支撑体系的结构影响系数和位移放大系数[D].南京:河海大学,2008.
[6]Shih-Ho Chao.Performance-based seismic design of EBF using target drift and yield mechanism as performance criteria[R].University of Michi-gan,College of Engineering,USA,2005.
[7]邵建中,顾强.偏心支撑钢框架基于屈服点谱的性态抗震设计(I)—方法[J].苏州科技学院学报:工程技术版,2011,24(2):15-18.
[8]Leelataviwat,Goel,Stojadinovic.Toward Performance-Based Seismic Design of Structures[J].Earthquake Spectra,1999,15(3):435-461.
[9]中国建筑科学研究院.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[10]高学奎.近场地震动输入问题的研究[J].华北科技学院学报,2005(3):80-83.
[11]邵建中,顾强.偏心支撑钢框架基于屈服点谱的性态抗震设计(Ⅱ)—算例验证[J].苏州科技学院学报:工程技术版,2011,25(3):18-22.
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