简支梁桥线形变化对轻轨列车单双线运行性的影响及差异  

Effect of girder deformation of simply supported beam bridges on running properties of single and double track light-rail train and the difference

作　　者：王少杰[1,2] 徐赵东[1] 李舒[1] 李红伟 Shirley J.Dyke 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]普渡大学土木工程学院,印第安纳西拉斐特47907

出　　处：《中南大学学报（自然科学版）》2017年第6期1674-1681,共8页Journal of Central South University:Science and Technology

基　　金：国家中青年科技创新领军人才支持计划项目(2016);江苏省自然科学基金资助项目(BK20151092);江苏省普通高校研究生科研创新计划项目(CXLX13_102);中央高校基本科研业务费专项资金资助项目(3205004907)~~

摘　　要：以列车-轨道-桥梁系统动力分析理论为基础,基于商业软件ANSYS和APDL语言,针对某城市轻轨工程,建立考虑简支梁桥线形变化的轻轨列车-轨道-桥梁三维动力非线性分析有限元模型,研究桥墩沉降、梁体下挠/上拱对轻轨列车单双线运行性能的影响。研究结果表明:所建模型具有高效、稳定、可靠、可视等特点;桥梁跨中竖向位移响应在列车交会区约为单线运行时的2倍,轮重减载率与单线过桥相比无显著变化,车体最大加速度和Sperling指数较单线过桥时小幅增加;车速是影响轻轨列车运行安全性最主要的因素,其次是梁体线形变化,而运行方式影响程度最小;伴随车速增加,轻轨列车运行平稳性变差;与车体最大加速度相比,Sperling指数对单双线运行方式的影响有更好区分度。Based on dynamic analysis theory on train-track-bridges system, for one city light-rail project, a 3-D nonlinear dynamic analysis finite element model of light-rail train-track-bridges system with considering the girder deformation of simply supported beam bridge was established by using commercial software ANSYS and APDL language. The influence of pier settlement, the deflection/camber of girder on the run performance of single-track and double-track light rail train was studied. The results show that the model is efficient, stable, reliable, visible and the bridge mid-span vertical displacement response in the intersection area of the train is about two times that of a single-track. The offload factor has no significant changes as compared with single-track, while the vehicle maximum acceleration and Sperling index have a slight increase compared with the single-track. Running speed is the most important factors that affect the light-rail train running safety, followed by the girder deformation, while the minimum is the operating mode. The light-rail train running smoothly deteriorated with vehicle speed increases, and compared with the maximum acceleration of the vehicle body, there is better discrimination of the effect of Sperling index on single-track and double-track operation modes.

关 键 词：桥墩沉降 梁体下挠/上拱 轻轨列车 运行安全性 运行平稳性 相互作用系统 

分 类 号：U24[交通运输工程—道路与铁道工程] U211.3