行进加载试验替代静载试验的桥梁检测方法研究

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。

Study on Moving Loading Test Instead of Conventional Static Loading Test in Bridge Inspection

In this paper a moving loading test was proposed to instead the conventional static loading test, and its loading method and effect factors are introduced. The deflection of beam in static loading test can be concluded from the data of moving loading test, and its result can be used in bridge inspection with corresponding code. The advantage of this moving loading test is that it have little negative effect on traffic. Because the traffw is more and more difficult to interrupt, this loading method proposed by the paper has significance for bridge inspection. Although this loading method is still in researching, but the results from the test are available. Othenvise this method has to been improved in the future. Finally, this loading method has been applied in two actural bridges in Qinhuangdao , and it has satisfactory results.