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本文提出了替代传统桥梁静载试验的行进加载试验,介绍了行进加载试验的加载方法以及影响因素。通过桥梁行进加载试验获取挠度数据,可以推定桥梁的静载试验挠度,从而根据推定静载试验挠度按照现行规范对桥梁承载力进行评价。在以后桥梁加载试验检测中,通过行进加载试验替代静载试验,快速便捷,对交通影响较小。因此,该行进加载评定桥梁承载力试验方法的提出,在当前道路交通拥堵以至难以阻断进行传统静载试验的情况下,对城市公路桥梁的检测评定具有非常重要的意义。该行进加载试验的方法目前还处于研究阶段,从试验结果来看,基本可行,有待完善。最后,介绍了清华大学结构工程检测中心对秦皇岛两桥应用此方法的实际情况,结果较好。
In this paper, we put forward a test of the running load instead of the static load test of the traditional bridge and introduce the loading method and the influencing factors of the running load test. The deflection data can be obtained through the bridge loading test, which can be used to estimate the deflection of the static load test of the bridge, and evaluate the bearing capacity of the bridge according to the existing specifications. In the later bridge loading test, the static loading test is replaced by the traveling loading test, which is quick and convenient and has little impact on the traffic. Therefore, this method of assessing the load-bearing capacity of the bridge is proposed in this paper. It is of great significance to test and evaluate the urban highway bridges under the condition of the current traffic jam and even the traditional static load test. The method of traveling load test is still in the research phase. From the test results, it is basically feasible and needs further improvement. Finally, the actual situation of applying this method to the Qinhuangdao No.2 Bridge by the Structural Engineering Testing Center of Tsinghua University is introduced. The result is good.