Study on Crowd Load Dynamic Response of Long-span Aluminum Alloy Flyover
In order to study the dynamic response of long-span aluminum alloy bridge under multi-load,taking a long-span aluminum al-loy bridge as an example,based on the pedestrian load model of Fourier series,MIDAS CIVIL is used for theoretical calculation and analy-sis.The structural dynamic response of five kinds of crowd load cases passing through the flyover is selected,and the goals are the middle of the first span and the second span of the flyover,and the comfort of the flyover is analyzed.The results show that when the pedestrian walking frequency tends to the first vertical fundamental frequency of the overpass,the dynamic response of the overpass is the largest.The dynamic response of the crowd walking in two-way is less than that in one-way walking,and there is a big difference in the dynamic re-sponse time history of the overpass under different working conditions.It is suggested that different working conditions should be comprehen-sively considered in the design of the flyover to ensure that the structure of the flyover meets the requirements and avoid the resonance prob-lem at the same time.Improve the walking comfort of the overpass.
long span aluminum alloy flyoverdynamic characteristicsdynamic responsecrowd loadcomfort degree
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