摘要
为研究列车振动对钢桥面铺装复合体系力学行为的影响,以九江长江大桥公路正桥(改造后,采用正交异性钢桥面铺装复合体系)为背景,采用Abaqus有限元软件建立加载公路车辆荷载的模型与同时加载公路车辆荷载和列车振动荷载的模型,对比分析2种模型钢桥面铺装复合体系力学响应的变化规律。结果表明:与仅承受公路车辆荷载相比,列车振动与公路车辆荷载耦合作用不会改变公路路面与横隔板位置处的应力分布规律,最大应力的位置也保持不变,虽然会大幅度增加钢桥面铺装复合体系的应力,产生较大的竖向位移,但整体上在可控范围内;在设计和施工等阶段需采用更高的标准来保证桥梁结构的使用性能。
To study the influence of train vibration on the mechanical property of steel deck-pavement composite system,the main bridge of Jiujiang Changjiang River Highway Bridge that has got an orthotropic steel deck-pavement composite system after rehabilitation is taken as a study case.The model applied with vehicle loads and the model applied simultaneously with vehicle loads and train vibration loads were built up by Abaqus,to analyze and compare the variation law of the mechanical property of the steel deck-pavement composite system.The results show that compared to the condition of carrying mere highway vehicle loads,the coupling of train vibration and vehicle loads is not likely to change the stress distribution patterns in the highway deck and at the locations of diaphragms,and the locations of maximum stresses remain the same,but will increase the stresses in the steel deck-pavement composite system and induce bigger vertical displacement,nevertheless the displacement is in the controllable range.It is recommended that higher criteria should be followed in the design and construction stages to ensure the service performance of the bridge structure.
作者
钱宇峰
刘强
张煜恒
钱振东
薛永超
QIAN Yu-feng;LIU Qiang;ZHANG Yu-heng;QIAN Zhen-dong;XUE Yong-chao(Jiangxi Province Traffic Construction Engineering Quality Supervision Administration,Nanchang 330096,China;Jiangxi Ganewan Road-Bridge Investment Co.,Ltd.,Jiujiang 332099,China;Intelligent Transportation System Research Center,Southeast University,Nanjing 211189,China)
出处
《世界桥梁》
北大核心
2021年第1期59-64,共6页
World Bridges
基金
江西省交通厅科技项目(JJYQ-ZX-032)。
关键词
公路铁路两用桥
钢桥面铺装复合体系
列车振动
荷载耦合作用
应力
位移
有限元法
rail-cum-road bridge
steel deck-pavement composite system
train vibration
vehicle and train load coupling
stress
displacement
finite element method
