客运专线双柱式桥墩的地震损伤分析

英文篇名：Analysis on the Seismic Damage for Double Column Pier of Passenger Dedicated Line
中文刊名：郑州大学学报(工学版)
英文刊名：Journal of Zhengzhou University(Engineering Science)
作者：王涛 ; 李宇 ; 白桦 ; 雷俊卿
英文作者：WANG Tao1 ; LI Yu1 ; BAI Hua1 ; LEI Jun-qing2(1.Key Laboratory of Ministry of Communications for Bridge Detection & Reinforcement Technology ; School of Highway ; Chang′an University ; Xi′an 710064 ; China ; 2.School of Civil Engineering ; Beijing Jiaotong University ; Beijing 100044 ; China)
中文关键词：客运专线桥梁 ; 地震损伤 ; 时程分析 ; 非线性
英文关键词：bridge of passenger dedicated line ; seismic damage ; time history analysis ; nonlinear
出版日期：2012-07-10
机构：长安大学公路学院旧桥检测与加固技术交通行业重点试验室;北京交通大学土木建筑工程学院;
年：2012
期：04
出版单位：郑州大学学报(工学版)

摘要

依据我国现行的《铁路工程抗震设计规范》,合理地选取了强震记录作为地震输入,采用大型有限元分析软件,考虑柔性地基效应和地震动特性的影响,建立了某客运专线双柱式桥墩的有限元模型,并基于Park-Ang地震损伤模型和非线性地震响应分析,研究了客运专线双柱式桥墩的地震损伤全过程.分析结果表明:①桥梁结构的损伤破坏主要是发生在地震过程的中前期;②即使所采用的地震动记录的场地类型和PGA都相同,但它们对桥梁结构所造成的损伤还是有较大差异;③虽然PGA对桥梁结构损伤性能指标的影响十分显著,但它对结构最大损伤性能指标的发生时间并没太大的影响.
Reasonable strong seismic motion records are selected according to the applicable Code of Seismic Design for Railway Engineering.By using FEA software,the FEA model of one double-column pier of passenger dedicated line is established with considering the effect of flexible base effects and seismic characteristic.Based on Park-Ang seismic damage model and nonlinear seismic response analysis,the seismic damage analysis on double-column pier of passenger dedicated Line is carried out.The study results are obtained as follow: 1) The seismic damage of bridge mainly happen during the early and middle stage of seismic motion.2) There are still major discrepancies in the seismic damage made from the seismic records which come from the same site condition and have the same PGA.3) Although PGA has a great effect on the seismic damage index,it has nothing to do with the happening time of max seismic damage index.

引文

[1]国家发展和改革委员会交通运输司.国家《中长期铁路网规划》内容简介[J].交通运输系统工程与信息,2005,5(4):1-4.
    [2]FAJFAR P,GASPERSIC P.A simplified nonlinearmethod for seismic evaluation of RC bridge[C].Pro-ceedings of 6th U.S.National Conference on Earth-quake Engineering,1998.
    [3]BABON H BIGGS M J,IRVINE M H,et al.Seismicdamage in reinforced concrete frames[J].Journal ofsturcture Engineering,1981,107(9):1713-1729.
    [4]FAJFAR P.Equivalent ducility factors taking into ac-count low-cycle fatigue[C].Earthquake Engineeringand Structural Dynamics,1992,21.
    [5]DJORDJE L,RADOMIR F.Application of improveddamage index for designing of earthquake resistantstructures[C].Proceedings of 13WCEE,Vancouver,B.C,Canada,2004:2135.
    [6]PARK Y J,ANG A H S.A mechanistic seismic dam-age model for reinforced concrete[J].Journal ofStructural Engineering,1985,111(4):722-739.
    [7]PARK Y J,ANG A H S.Seismic damage analysis ofreinforced concrete buildings[J].Journal of StructuralEngineering,1985,112(2):102-109.
    [8]WILLIAMS S,SEXSMITH R G.Seismic damage indi-ces for concrete structures:A State-of-art Review[J].Earthquake Spectra,1995,11(2):319-349.
    [9]GB50111―2006,铁路工程抗震设计规范[S].北京:中华人民共和国铁道部,2006.
    [10]TB1002.5―99,铁路桥涵地基和基础设计规范[S].北京:中华人民共和国铁道部,2000.
    [11]Ucfyber:Cross Section Analysis Software for Structur-al Engineers[CP].University of California at Berke-ley,2000.