摘要
以某主跨110m的自锚式钢管混凝土中承桁架拱桥为对象,分析了该桥的自由振动特性和移动车辆荷载作用下主跨桥面系的振动特性。计算结果表明:采用单轴和双轴移动车辆模型计算出的桥面系振动特性差别不大;不同车速的移动车辆荷载引起桥面系的振动响应不同,车速快时,桥面系竖向振动的最大位移减小,竖向振动的最大速度和加速度增加。
Taking a self-anchored half-through concrete-filled steel tubular truss arch bridge with a 110 meters main span for example, the natural vibration properties and vibration properties of main span decksystem under moving vehicle load are discussed. The results of calculation indicate that the differences on the vibration properties of main span deck system under signle-axle or double-axle moving vehicle load are small; the vibration properties of main span deck system under different speed moving vehicle load are dif- ferent, and when the speed is faster, the maximum vertical displacement is reduced and the largest vertical vibration velocity and acceleration increase.
出处
《公路》
北大核心
2012年第3期30-34,共5页
Highway
关键词
移动车辆荷载
钢管混凝土拱桥
振动
作用
分析
moving vehicle load
concrete-filled steel tubular arch bridge
vibration
action
analysis
