In order to investigate the vertical human-bridge dynamic interaction of lightweight footbridges, a vertically coupling dynamic equitation based on bipedal pedestrian model is developed. A comparison between the simulated foot force on rigid ground and the curve from reference shows that the bipedal walking model provided in this paper can closely simulate the feature of ground reaction force. Rational ranges of the parameters of this bipedal model are discussed. A 22.8m-span aluminum alloy footbridge (with the 1st vertical bending frequency of 7.23Hz) is taken as the case to calculate the structural dynamic responses under vertical crowd-bridge interaction. Random crowd conditions of different densities are simulated with the generation of stochastic walking parameters by Monte-Carlo method, and the direct integral method is used for numerical analysis. The results indicate that, as the pedestrian density rises, the predominant frequencies of human-bridge interaction vibration tend to disperse, of which the responses are much less than the results that not consider the interaction.
XIE Xu, ZHONG Jingru, ZHANG He, ZHANG Zhicheng.
Calculation method for vertical human-bridge dynamic interaction[J]. Journal of Vibration and Shock, 2016, 35(5): 108-114
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