Abstract:To address the inadequate pedestrian crossing system on the Vanke City section, a footbridge with an "I"-shaped layout and a curved main bridge of varying width is studied and designed. Its main bridge is a through bowstring arch bridge with 51.05-m span. Its arch ribs are inclined inward by 13.7°, and a spatially hyperbolic canopy is set up. The overall model is established through MIDAS Civil and the local fine analysis is carried out by ANSYS to systematically calculate and analyze the structural stress, deformation, stability and crowd comfort. The results show that both stress levels and deformations of the structure meet the code requirements, and the overall stability is satisfactory. Aiming at the problem of low fundamental frequency, four eddy current tuned mass dampers (TMDs) are innovatively employed to meet the comfort criteria for pedestrian-induced vibration. The study result demonstrates that through appropriate structural selection and the application of TMDs under complex pipeline conditions, the design scheme achieves an integration of structural safety, using function and landscape effect, which can provide a reference for the design of urban footbridges in similar contexts.
