便桥结构动力参数测试与工作状态评定研究

Dynamic Testing and Work Performance Evaluation Research of the Temporary Bridge Structure

以某便桥中跨上部框架结构为背景,采用锤击法进行了现场动力特性测试,同时对其建立了有限元模型,得出相应的动力特性参数,通过分析与对比得到了客观、准确的测试及理论数据,进而对其整体结构进行了工作性能评定,此检测与评定方法对同类土木工程结构性能评定具有一定的参考价值。

In civil engineering, the exact location of structural damage can be detected in time with the structural health monitoring technology, and even the hidden parts of the damage can also he found. So this health monitoring provides technical support for structural post-maintenance. In the paper, the framework structure of a temporary bridge was studied. In the actual testing, its dynamic characteristics were tested by the pulse method. And then its finite element model was established and its theoretical dynamic characteristics were calculated. The accurate testing and theoretical data were obtained through the analysis and comparison. Then the overall work performance of the temporary bridge was evaluated objectively. This paper can provide reference for the performance evaluation of similar civil engineering structures.