某立交桥匝道曲线梁结构动力特性检测及分析

Dynamic characteristics testing and analysis of some overpass ramp curved beam structure

对某立交桥匝道曲线梁进行动力荷载试验,分析了结构的振型、自振频率、冲击系数等动力特性,以及结构的动应变、加速度等动力反应,建立了匝道曲线梁的空间有限元模型并进行了分析,试验结果与有限元分析结果基本一致,表明匝道桥能满足通车以后安全运营的性能要求。

Some overpass ramp curved beam was tested of dynamic load, some dynamic characteristics such as vibration mode of structure, natural frequency and impact coefficient were analyzed, and dynamic reactions such as dynamic strain of structure and acceleration were also analyzed. Built the finite element model of ramp curved beam. The results are agreement with the finite element analysis results, and it can be shown that ramp bridge can satisfied the performance requirement of safe running after opening of traffic.