Static and Dynamic Analysis of Construction Catwalk of Long-Span Suspension Bridge

With the increasing span of the suspension bridge, the wind resistance design of the catwalk has gradually become the dominant factor controlling its design. Therefore, it is necessary to analyze its static and dynamic characteristics and the factors that affect its dynamic characteristics. Taking the catwalk of a long-span suspension bridge as an example, the static and dynamic analysis of the catwalk is carried out based on Midas/Civil software and cable vibration theory. The results show that the dynamic characteristics of the catwalk obtained by the finite element model are consistent with the results of theoretical analysis. The stress of various components in the catwalk meets the safety factor requirements under extreme loads. However, there are obvious low-order vibrations in the local nodes of the catwalk structure, which will generate significant wind-induced responses at high wind speeds and significantly impact construction. The research can provide a further reference for the wind resistance design of catwalks of the same type.