Experimental research and parameter analysis on the dynamic factor of railway steel-concrete composite beams
LI Yun-sheng 1 , LI Shuai 1,2 , ZHANG Yan-ling 1
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1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043 China; 2. School of Civil Engineering, Southeast University, Nanjing 210000 China
The dynamic model test was conducted on two steel-concrete composite beams with the shear connection ratio as parameter, the dynamic response were measured when the train model passed through the beam with different speed and weight. The train-bridge finite element model was built by ANSYS software, and the influence of some parameters on the dynamic factor of composite beams were analyzed, these parameters included the train speed, the beam span, the frequency ratio of train to beam, the weight ratio of train to beam, and the shear connection ratio. The results show that the dynamic factor of composite beams increases with alternating resonant and cancellation; the dynamic factor increase with the increase of the frequency ratio of train to beam, but decrease with the increase of the beam span, the shear connection ratio, and the weight ratio of train to beam, and smaller the weight ratio of train to beam, faster the falling speed of the dynamic factor. In all the parameters, the dynamic factor is mostly influenced by the span of the composite beams and the frequency ratio of train to beam.
LI Yun-sheng ;LI Shuai;;ZHANG Yan-ling .
Experimental research and parameter analysis on the dynamic factor of railway steel-concrete composite beams [J]. Journal of Vibration and Shock, 2014, 33(11): 189-194
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