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从测试系统的组成,测试截面、测试方法的选取、加载工况等几个方面论述了动载荷试验在青岛某大桥变形监测中的应用。最终的动载荷试验数据表明:跑车作用下实测桥的最大动力放大系数小于规范中的计算值;跳车试验动应变增加明显,说明保证桥面通畅对减少桥梁冲击荷载很重要。
The application of dynamic load test in the deformation monitoring of a bridge in Qingdao is discussed from the aspects of the composition of the test system, the test section, the selection of test methods and the loading conditions. The final dynamic load test data show that the maximum dynamic amplification factor of the measured bridge under the action of sports car is less than the calculated value in the code. The dynamic strain of the jumping test increases obviously, which shows that it is very important to ensure the bridge deck to reduce the bridge impact load.