竖向不规则钢筋混凝土框架结构基于性能的抗震设计方法
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摘要
考虑结构在地震作用下不同反应阶段的动力特性,采用振型反应谱法,建立结构在不同地震作用水平下的弹塑性需求曲线族,即结构的层间剪力-位移需求曲线。结合结构的能力曲线,提出以楼层为研究对象的层间能力谱法。由结构的性能目标与位移延性的关系,建立性能目标与层间需求曲线的关系,从而得到考虑结构延性的层间需求曲线。通过计算分析表明,层间能力谱法可以有效的用于对竖向不规则结构进行基于性能的抗震设计,可以方便地对不同地震作用水平、不同性能目标的结构进行地震作用计算和配筋计算,并能控制结构在不同地震作用下的变形性能、塑性铰出现顺序及部位,与时程分析方法相比偏于保守,且比直接基于位移的设计方法具有明显的优势。
Considering the dynamic characteristics of structures under different earthquake hazard level,s inelastic demand curves, namely, inter-story shear versus inter-story displacement curve are established by using mode spectrum method. Based on the relationship between structure performance objective and displacement ductibility, the relationship between structure performance objective and inter-story demand curve is obtained. The inter-story demand curves adequately take into account of the inelastic behavior of structures under earthquake action. Then considering the capacity cure of the structure, a new method, named inter-story capacity spectrum method, is put forward for the performance based seismic design of vertically irregular frame structures. Examples are presented to demonstrate the applicability and utility of the proposed method. It is concluded that the new method can control the inter-story drift, the order and the position of hinges of vertically irregular structures under different earthquake hazard levels. Comparing with time history analysis method, the proposed method is more conservative and is superior to direct displacement-based design(DDBD)method.
Considering the dynamic characteristics of structures under different earthquake hazard level,s inelastic demand curves, namely, inter-story shear versus inter-story displacement curve are established by using mode spectrum method. Based on the relationship between structure performance objective and displacement ductibility, the relationship between structure performance objective and inter-story demand curve is obtained. The inter-story demand curves adequately take into account of the inelastic behavior of structures under earthquake action. Then considering the capacity cure of the structure, a new method, named inter-story capacity spectrum method, is put forward for the performance based seismic design of vertically irregular frame structures. Examples are presented to demonstrate the applicability and utility of the proposed method. It is concluded that the new method can control the inter-story drift, the order and the position of hinges of vertically irregular structures under different earthquake hazard levels. Comparing with time history analysis method, the proposed method is more conservative and is superior to direct displacement-based design(DDBD)method.
引文
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[7]徐培福,戴国莹.超限高层建筑结构基于性能抗震设计的研究[J].土木工程学报,2005,38(1):1-10(Xu Peifu,Dai Guoying.Performance-based seismic design of tall building structures beyond the code-specification[J].China Civil EngineeringJournal,2005,38(1):1-10(in Chinese))
[8]门进杰.不规则钢筋混凝土框架结构基于性能的抗震设计理论和方法[D].西安:西安建筑科技大学,2007(Men Jinjie.Theory and methods of performance based seismic design for irregular reinforced concrete frame structures[D].Xi’an:Xi’an University of Architecture and Technology,2007(in Chinese))
[9]AschheimM.Seismic design based on the yield displacement[J].Earthquake Spectra,2002,18(4):581-600
[10]梁兴文,黄雅捷,杨其伟.钢筋混凝土框架结构基于位移的抗震设计方法研究[J].土木工程学报,2005,38(9):53-60(Liang Xingwen,Huang Yajie,Yang Qiwei.Displacement-based seismic design method of RC frames[J].China Civil Engineering Journal,2005,38(9):53-60(in Chinese))
[11]Miranda E,Ruiz-Garcia J.Evaluation ofapproximate methods to estimate maximum inelastic displacement demands[J].Earthquake Engineering and Structural Dynamics,2002,31(3):539-560
[2]小谷俊介.日本基于性能结构抗震设计方法的发展[J].建筑结构,2000,30(6):3-9(Shunsuk Otani.Japanese development of performance-based design technology[J].Building Structure,2000,30(6):3-9(in Chinese))
[3]Priestley M J N,Kowalsky M J.Direct displacement-based seismic design of concrete buildings[J].Bulletin of the New Zealand Society for Earthquake Engineering,2000,33(4):421-444
[4]史庆轩.钢筋混凝土结构基于性能的抗震研究及破坏评估[D].西安:西安建筑科技大学,2002(Shi Qingxuan.Performance based seismic research and damage assessment for reinforced concrete structure[s D].Xi’an:Xi’an University of Architecture and Technology,2002(in Chinese))
[5]吕西林,周定松,蒋欢军.钢筋混凝土框架柱的变形能力及基于性能的抗震设计方法[J].地震工程与工程振动,2005,25(6):53-61(LüXilin,Zhou Dingsong,Jiang Huanjun.Deformation capacity and performance-based seismic design method for RC frame columns[J].Earthquake Engineering and Engineering Vibration,2005,25(6):53-61(in Chinese))
[6]汪梦甫,周锡元.基于性能的建筑结构抗震设计[J].建筑结构,2003,33(3):59-61(Wang Mengfu,Zhou Xiyuan.Performance-based earthquake resistive design for building structures[J].Building Structure,2003,33(3):59-61(in Chinese))
[7]徐培福,戴国莹.超限高层建筑结构基于性能抗震设计的研究[J].土木工程学报,2005,38(1):1-10(Xu Peifu,Dai Guoying.Performance-based seismic design of tall building structures beyond the code-specification[J].China Civil EngineeringJournal,2005,38(1):1-10(in Chinese))
[8]门进杰.不规则钢筋混凝土框架结构基于性能的抗震设计理论和方法[D].西安:西安建筑科技大学,2007(Men Jinjie.Theory and methods of performance based seismic design for irregular reinforced concrete frame structures[D].Xi’an:Xi’an University of Architecture and Technology,2007(in Chinese))
[9]AschheimM.Seismic design based on the yield displacement[J].Earthquake Spectra,2002,18(4):581-600
[10]梁兴文,黄雅捷,杨其伟.钢筋混凝土框架结构基于位移的抗震设计方法研究[J].土木工程学报,2005,38(9):53-60(Liang Xingwen,Huang Yajie,Yang Qiwei.Displacement-based seismic design method of RC frames[J].China Civil Engineering Journal,2005,38(9):53-60(in Chinese))
[11]Miranda E,Ruiz-Garcia J.Evaluation ofapproximate methods to estimate maximum inelastic displacement demands[J].Earthquake Engineering and Structural Dynamics,2002,31(3):539-560
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