摘要
采用单个移动质量-弹簧-阻尼模型模拟车辆,应用达朗贝尔原理和位移协调条件,推导出车桥耦合振动的运动方程.考虑几何非线性及桥面不平度因素,就车辆沿桥纵轴向中心行驶和偏心行驶2种工况,探讨单个移动车辆荷载对双链悬索桥振动响应的影响.针对桥面设计理论竖曲线、水平竖曲线、运营20多年后实测竖曲线,综合考虑桥面不平度,探讨在单个移动车辆荷载下双链悬索桥的车振响应特征.这对该类桥动力性能评估及动力加固设计都有积极的意义.
A single moving mass-spring-damper model is adopted to simulate the vehicle model. The equation of vehicle-bridge coupling vibration is derived, using D＇Alembert principle and the conditions of displacement compatibility. The dynamic responses of a double cable suspension bridge to the vehicle moving at dif- ferent speeds are analyzed, taking into account geometric nonlinearity and irregular profile of the bridge pavement under two types of vehicle loading conditions, namely moving along the center and the eccentric longitudinal axis. The character of vehicle vibration of double cable suspension bridge under a single moving vehicle load is discussed, contrary to designing vertical curve, level of vertical curve, and measured verti- cal curve after 20 years service, synthetically considering the bridge deck roughness. The study of the dynamic responses character of double cable suspension bridge has a positive significance on dynamic performance evaluation and reinforcement design of such type bridge.
出处
《兰州交通大学学报》
CAS
2010年第1期95-99,共5页
Journal of Lanzhou Jiaotong University
基金
甘肃省自然科学基金(2008GS02604)
兰州交通大学"青蓝"人才工程基金(QL-05-13A)
关键词
桥梁工程
车桥耦合振动
几何非线性
双链式悬索桥
路面不平度
车辆模型
bridge engineering
vehicle-bridge coupling vibration
geometric nonlinearity
double cable suspension bridge
irregular profile of bridge pavement
vehicle model
