摘要
随着西部大开发战略的实施,西部交通网络逐渐完善。由于西部山区河流沟谷众多,需借助大跨度桥梁实现跨越。而高墩大跨连续刚构桥凭借其适应能力强、跨越能力大以及性价比高等诸多优点,被广泛修建于山区峡谷等条件恶劣的环境中。但西部山区大风天气频发,行驶在桥上的车辆若横向受到强风荷载作用可能会导致发生侧滑或侧翻事故。本文以四川雅江木绒大桥为工程背景,建立桥梁有限元模型和两轴四轮、三轴六轮空间车辆动力模型,模拟生成A级路面不平整度序列;通过二维CFD软件计算不同工况下车-桥断面静力三分力系数;选取5种典型车辆形成随机车流对大桥进行风荷载作用下行车安全性研究。
With the implementation of the western development strategy,the traffic network in the western region is gradually improved. Because there are many rivers and valleys in the western mountainous area,large-span bridges are needed to cross the valleys. The continuous rigid frame bridge with high pier and long span,with its strong adaptability,large span ability and high cost performance,has been widely built in the harsh environment such as mountain canyons.However,gale weather often occurs in the western mountainous area,vehicles driving on the bridge are subjected to strong wind load,it may lead to vehicle side slip or rollover accidents. In this paper,taking Sichuan Yajiang Murong Bridge as the engineering background,the finite element model of the bridge and the two axle four wheel,three axle six wheel space vehicle dynamic model are established,the A-class road roughness series are simulated. The static three component coefficients of vehicle bridge section under different working conditions are calculated by two-dimensional CFD software.Five typical vehicles are selected to form random traffic flow,and the research on the driving safety of the bridge under wind load is performed.
作者
徐纯治
XU Chunzhi(China Railway 18^(th)Bureau Group 2^(nd)Engineering Co.Ltd.,Tangshan Hebei 064000,China)
出处
《铁道建筑技术》
2021年第8期85-88,101,共5页
Railway Construction Technology
关键词
连续刚构桥
风-车-桥耦合振动
CFD
行车安全
continuous rigid frame bridge
wind vehicle bridge coupling vibration
CFD
driving safety
