高架桥梁抗震设计的弹塑性反应谱法
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摘要
为了在城市轨道交通高架桥梁抗震设计中实现弹塑性分析和性能设计的结合,基于弹塑性反应谱方法研究了抗震设计的整体流程.给出了基于弹塑性反应谱法进行高架桥梁地震反应分析的基本方法,确立了与该方法相应的强度、构件变形和基础位移等性能指标,形成了可供工程设计所实际应用的完整设计流程.工程实例分析表明,弹塑性反应谱分析可细致考查结构各指标在强烈地震作用下的反应值,与非线性时程分析相比,该方法简明、高效、稳定,并具备谱分析的统计意义,可作为城市轨道交通高架桥梁基于性能抗震设计的实用方法.
In order to achieve a combination between the elasto-plastic analysis and the performance-based seismic design for the urban rail transit viaducts(RTV),the entire seismic design procedure was created based on the elasto-plastic response spectrum analysis(EPRSA) method.The researchers studied the analysis method used in the seismic design.The researchers also established performance indices,which included strength,member deformation and foundation displacement,and then formed the entire procedure for the practical seismic design work.Analysis results show that the EPRSA method had advantages such as: conciseness,efficiency,calculation stability and statistical meaning for the spectrum analysis in contrast to the nonlinear time-history analysis.The EPRSA method was identified as being a practical method in the seismic design of the urban rail transit viaducts.
In order to achieve a combination between the elasto-plastic analysis and the performance-based seismic design for the urban rail transit viaducts(RTV),the entire seismic design procedure was created based on the elasto-plastic response spectrum analysis(EPRSA) method.The researchers studied the analysis method used in the seismic design.The researchers also established performance indices,which included strength,member deformation and foundation displacement,and then formed the entire procedure for the practical seismic design work.Analysis results show that the EPRSA method had advantages such as: conciseness,efficiency,calculation stability and statistical meaning for the spectrum analysis in contrast to the nonlinear time-history analysis.The EPRSA method was identified as being a practical method in the seismic design of the urban rail transit viaducts.
引文
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[3]European Committee for Standardization.BS EN 1998-1:2004.Eurocode 8-Design of structures for earthquake re-sistance,Part 1:General rules,seismic actions and rulesfor buildings[S].London:British Standards Institution,2004.
[4]中华人民共和国铁道部.GB50111-2006铁路工程抗震设计规范[S].北京:中国计划出版社,2006.
[5]中华人民共和国交通运输部.JTG/T B02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[6]丁建国,陈伟.弹塑性反应谱的分析[J].南京理工大学学报,2011,35(4):573-578.DING Jianguo,CHEN Wei.Elasto-plastic response spec-trum and its applications in aseismatic design[J].Journalof Nanjing University of Science and Technology,2007,31(6):780-783.
[7]CHOPRA A K,GOEL R K.A modal pushover analysis pro-cedure for estimating seismic demands for buildings[J].Earthquake Engineering and Structural Dynamics,2002,31:561-582.
[8]周颖,卜一,吕西林,等.考虑我国场地土类型的弹塑性反应谱法在高层混合结构中的应用[J].地震工程与工程振动,2009,29(2):57-65.ZHOU Ying,BO Yi,LXilin,et al.The application ofelasto-plastic response spectrum analysis to a hybrid struc-ture[J].Journal of Earthquake Engineering and Engineer-ing Vibration,2009,29(2):57-65.
[9]日本道路協会.道路橋示方書(Ⅴ耐震設計編).同解説[S].日本東京:丸善株式会社,2002.
[10]日本鉄道総合技術研究所.鉄道構造物等設計標準.同解說-耐震設計[S].日本東京:丸善株式会社,1999.
[11]韩鹏,王君杰,黄勇,等.美国和日本桥梁桩基础抗震设计方法对比[J].北京工业大学学报,2011,37(增刊1):9-17.HAN Peng,WANG Junjie,HUANG Yong,et al.Compar-ison of seismic design of pile foundations for bridges in A-merica and Japan[J].Journal of Beijing University ofTechnology,2011,37(Supp 1):9-17.
[12]全国地震标准化技术委员会.GB17741-2005工程场地地震安全性评价[S].北京:中国标准出版社,2005.
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