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桥梁荷载试验是鉴定桥梁承载能力、评价桥梁现状的重要手段。文中以某高架桥为背景,介绍了预应力空心板桥荷载试验的加载工况、测点布置及荷载效率,测出了静载工况下各控制截面的应力、挠度和不同行车速度下的加速度、振动频率;运用有限元软件MIDAS对检测桥梁进行建模分析计算,将实测试验数据与数值计算结果加以对比分析,对整座桥梁的实际承载能力作出评价;最后探讨了荷载加载位置和行车速度对荷载试验结果评定的影响。
Bridge load test is to identify the carrying capacity of the bridge, an important means of assessing the status quo of the bridge. In this paper, a viaduct as a background, introduced the prestressed hollow slab bridge load test load conditions, measuring point arrangement and load efficiency, measured under static load conditions of the control section of the stress, deflection and acceleration under different traffic speeds , And the vibration frequency. The finite element software MIDAS is used to analyze and calculate the test bridge. The measured test data and numerical calculation results are compared and analyzed to evaluate the actual load carrying capacity of the whole bridge. Finally, the load loading position and driving speed Impact on the evaluation of load test results.