车桥耦合振动对曲线钢混组合梁桥的影响
Influence of Vehicle-Bridge Coupled Vibrations on Curved Steel-Concrete Composite Girder Bridges
陈博宇 1高非凡 1李烁威 2张运波1
作者信息
- 1. 石家庄铁道大学 道路与铁道工程安全保障省部共建教育部重点实验室,河北 石家庄 050043;石家庄铁道大学 土木工程学院,河北 石家庄 050043
- 2. 中铁建安工程设计院有限公司,河北 石家庄 050043
- 折叠
摘要
针对曲线桥上部结构在车辆作用下受弯扭耦合影响的现象,应用有限元软件ANSYS和动力学软件UM,对曲线桥跨中截面位移与应力在车桥耦合作用下的响应情况进行分析研究,结果表明:位移与应力响应均在车辆行驶至该跨跨中时达到峰值,在车辆行驶至相邻跨跨中时达到相反峰值;径向位移与车速成正比,车速发生改变,除径向位移外的其他位移与应力响应曲线的整体趋势基本不变,响应峰值与速度的关系不成比例;内外偏载使跨中径向位移向偏载侧反向偏移,其余位移和应力响应的整体趋势基本不受偏载影响;不平顺等级的提升,桥梁上部结构响应的波动幅值均有提升.
Abstract
In response to the phenomenon of bending and torsional coupling of the upper structure of a curved bridge under vehicle load,the displacement and stress responses of the cross-section at the midspan of the curved bridge under the combined action of the vehicle and the bridge were analyzed and studied using ANSYS finite element software and UM dynamic software The results show that the displacement and stress responses reach their peak values when the vehicle travels to the midspan of the span,and reach the opposite peak values when it travels to the midspan of the adjacent span.The radial displacement is proportional to the vehicle speed,and the trend of other displacements and stress responses other than the radial displacement remains unchanged,while the peak values of the responses are not proportional to the speed.The lateral load causes the radial displacement at the midspan to shift in the opposite direction of the load,and the overall trend of the other displace-ments and stress responses is basically unaffected by the lateral load.The increase in the roughness grade of the road surface causes an increase in the amplitude of the fluctuations of the upper structure response.
关键词
车桥耦合/曲线桥/钢混组合桥/上部结构Key words
vehicle-bridge coupling/curved bridge/steel-concrete composite bridge/superstructure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据