大型桥梁动力特性检测方法

本文提出了对运营中的大型桥梁在不影响效能的前提下检验大桥主要结构受力状态及性能的实用方法。重点介绍了斜拉桥与悬索桥索力的振动测量法，桥梁动力特性的测试、桥塔水平位移的激光测量等实验技术；给出了山东东营黄河大桥实测与计算的结果。

Testing Methods of Dynamic Characteristics for Large Bridges

A practical method that can test the mechanical properties of large bridges under working conditions is presented in this paper. Especially,a method by measuring the dynamic internal forces of thecable-styled bridges and suspension bridges is introduced. Moreover,testing techniques including themeasurement of the dynamic characteristics of bridges and the horizontal displacement of towers bylaser are applied. By appling those methods and techniques, the testing results for the HuangHe riverbridge in dingYing, Shandong province are obtained which well agree with the theoretical analysis.Therefore, it is concluded that the bridge is still in good conditions. These methods have been provedpractical, economical and welcomed by engineers.