轨道约束对简支梁桥弹塑性地震反应的影响

英文篇名：Influnce of Rail Restraint on Elasto-plastic Seismic Response of Simply Supported Girder Bridge
中文刊名：西北地震学报
英文刊名：Northwestern Seismological Journal
作者：张永亮 ; 陈兴冲
英文作者：ZHANG Yong-liang1 ; 2 ; CHEN Xing-chong2(1.Key Laboratory of Road & Bridge and Undergroud Engineering of Gansu Province ; Lanzhou Jiaotong University ; Lanzhou 730070 ; China ; 2.School of Civil Engineering ; Lanzhou Jiaotong University ; Lanzhou 730070 ; China)
中文关键词：轨道约束 ; 简支梁桥 ; 弹塑性 ; 地震反应 ; 线桥一体化
英文关键词：Ril restraints ; Simply supported bridge ; Elasto-plastic ; Seismic response ; Rail-bridge into an organic whole model
出版日期：2012-06-30
机构：兰州交通大学甘肃省道路桥梁与地下工程重点实验室;兰州交通大学土木工程学院;
年：2012
期：02
出版单位：西北地震学报

摘要

结合高速铁路多跨简支梁桥及轨道系统的特点,建立了考虑钢轨、轨道板、轨道扣件摩擦以及桥梁结构的线桥一体化模型,采用非线性时程反应分析研究了轨道约束系统所选桥跨桥墩的弹塑性地震反应影响。结果表明:对相邻墩高相差较大的多跨简支梁桥,轨道约束系统对桥墩的弹塑性地震反应影响较大。建议对此类桥梁应采用线桥一体化模型进行弹塑性地震反应分析。
Based on the properties of multi-span simply supported girder bridges and rail system restraints on the high-speed railway,the rail-bridge into an organic whole model is established by considering rail,track slab,friction between rail and fasteners,and bridge structure.The nonlinear time history analysis method is adopted to research the influnce of rail system restraint on elasto-plastic seismic response of piers for selected spans.The results show that the effect of rail system restraint on elasto-plastic seismic response of multi-span simply supported girder bridge with relatively great differences among the height of adjacent piers is significant,so it is adviced for the case that the rail-bridge into an organic whole model should be adopted in elasto-plastic seismic response analysis.

引文

[1]张永亮,陈兴冲,夏修身.行波效应对铁路大跨连续刚构桥地震反应的影响[J].西北地震学报,2010,32(3):268-272.
    [2]Maragakis E.Full-Resonance Tests of a Railway Bridge[A]∥Structures Congress-Proceedings 1[C].ASCE,1996:183-190.
    [3]罗学海,朱葳,谢逢萱.铁路实体桥墩动力分析的简化方法[J].地震工程与工程振动,1982,2(3):87-95.
    [4]黄艳,阎贵平,刘林.轨道约束对铁路桥梁纵向地震反应特性的影响[J].铁道学报.2002,24(5):124-128.
    [5]马坤全,陈文艳.轨道交通高架桥合理抗震设计参数及抗震措施研究[J].中国铁道科学.2001,22(4):63-68.
    [6]张永亮,陈兴冲,李子奇.轨道约束系统对高速铁路多跨简支梁桥地震反应的影响[J].世界地震工程.2010,26(4):6-12.
    [7]铁路工程抗震设计规范(GB50111-2006)[C].北京:中国计划出版社,2006.
    [8]郑健.中国高速铁路桥梁[M]北京:高等教育出版社,2008.