Assessment of Vibration Serviceability of a Large-Span Cable-Supported Footbridges in the Scenic Area

Footbridges of the large span are prone to exhibit significant vibration when subjected to the dynamic excitation, which affects their serviceability. Thus many international codes regulate a dynamic check procedure. However, different provisions for such as load models and evaluation criteria are presented in different codes. Through comparison and reflection of several widely adopted codes, differences of these practical methods are put forward in this paper. Focusing on pedestrian density, a key parameter of the load model, field tests and investigations are conducted, after which a practical load model for high pedestrian density scenario is proposed and analyzed via numerical simulation based on a large-span cable-supported footbridge. Meanwhile, the buffeting response analysis is performed and wind-induced vibration of the deck has been obtained. Then the wind induced vibration comfort evaluation is carried out and shows the essential need of considering the influence of wind effect on the serviceability of large-span footbridges.

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