千厮门公轨两用钢桁架斜拉桥荷载试验控制计算分析

随着城市轨道交通建设突飞猛进,越来越多的桥梁结构也往公轨两用方向延伸发展,给日益拥堵的城市交通带来缓解,同时,也对公轨两用桥梁检测及荷载试验带来了挑战。通过介绍重庆千厮门嘉陵江大桥荷载试验控制计算方法,取得荷载试验各工况理论控制结果,包括桥梁的内力、变形、频率、振型等,与荷载试验实测结果进行比较分析,对桥梁的实际承载能力进行了准确评价;系统研究了公轨两用钢桁架斜拉桥荷载试验计算及评价等方面内容,给出了具体指导方法,为今后同类型桥梁荷载试验工作提供了参考。

Load test control calculation analysis of Qiansimen combined highway and railway steeltruss cable-stayed bridge

With the rapid development of urban railway, more and more bridge structures have a tendency to combine highway and railway to ease the congestion of urban traffic, which brings challenges to the detection and load test of the combined highway and railway bridge. We introduced the calculation method of load test control of Chongqing Qiansimen Jialing River Bridge, obtained the theoretical control results of load test under different working conditions, including internal force, deformation, frequency, mode and so on, and compared the results with measured results of load test, and thus evaluated the actual carrying capacity of the bridge accurately. We also systematically studied the calculation and evaluation of load test of combined highway and railway steeltruss cable-stayed bridges and gave specific guidance methods which would provide references for the same type of bridge load test in the future.