用车载试验检测旧简支梁使用承载力的探讨

本文通过用车载对三座钢筋混凝土简支T型梁桥的静、动态试验对比,表明可以用动态方法测量桥梁横向分布系数、竖向挠度等来表示静态结果。文中还对行车荷载作用时的冲击系数进行了测定分析。最后探索了静、动刚度关系及用来评价分析旧桥的使用承载力。并附以实例说明,以供应用参考。

The Research on the Examination of Load Carrying Capacity of Old Bridges by Vehicular Load Test

This paper describes the static and dynamic test of the three reinforced concrete simply supported T-beam bridges by vehicular load test. The dynamic methods can be used to measure the bridge coefficient of lateral distribution and vertical deflection, etc. To show the static results. in the paper, the impact coefficient of the live load of the running vehicle is measured and analysed. At last, the stiffness relation is studied and load carrying capacity of old bridges is analysed. Examples are given for reference.