单线铁路双跨简支π梁桥在列车动载作用下力学性能的研究

对青藏铁路某简支板梁桥进行现场动载试验,得到该桥梁结构在列车通过时的动力响应;同时采用midas/civil软件建模对该桥进行动力学的有限元分析得到数值解,将实测值和计算值进行对比分析,判断了其承载力和工作性能,为桥梁的加固与否提供依据。

Dynamic Load Test and Finite Element Analysis of Existing Double-span Simply Supported Plate Girder Bridge in the Railway Line

With the rapidly developing of our the country’s economy,railway transportation was proposed high-speed and heavy-load requirements.Due to the design,construction and Bridges long-serving reason,bridge diseases which have existed severely and affect the operation safety and railway transport capacity,are urgently needed reinforcement.The scene dynamic load tests are carried out on the double-span simply supported plate girder bridge in Qinghai-Tibet railway,which studied the dynamic response of the bridge structure when the train running on it.And the model was established by midas/civil to get numerical solutions of the dynamic behaviors which were comparatively analysed in order to evaluate the carrying capacity of the bridge.It provides reference datas for bridge strengthening.