九江长江大桥列车振动对钢桥面铺装复合体系的影响研究

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...

Study of Influence of Train Vibration on Steel Deck Pavement Composite System of Jiujiang Changjiang River Bridge

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.