Abstract：The long-span pedestrian suspension bridge has the characteristics of light weight and low damping, and its natural vibration frequency is often very low, which is within the sensitive range of pedestrian step frequency. Therefore, human-induced vibration becomes a problem that cannot be ignored in the design of this type bridges, especially for suspension bridges in scenic spot. Based on the nonlinear finite element software, the typical vertical and lateral bending modes of the long-span glass suspension bridge in the Kanggu parkland were selected by using the direct resonance theory.Through the finite element time-history analysis method, the vertical and lateral acceleration response time-history curves of bridge deck under different crowd loads were calculated and obtained. The results show that the natural vibration frequency of the proposed bridge is small and the multi-order natural vibration frequencies are in the sensitive range of human step frequency.It is easy to cause obvious vibration of the bridge under the crowd step frequency excitation, which affects the comfort of the bridge. Therefore, the corresponding vibration reduction measures should be proposed.
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2020, Vol. 39 
