Modal Analysis and TMD Design of the Wing-spread Bridge: A Pedestrian Bridge along the Binjiang Avenue, Shanghai

Wing-spread bridge is an innovative stress-ribbon arch pedestrian bridge expected to be built along Binjiang Avenue, Shanghai, China. Human-induced vibration is an important factor that needs to be considered in the operation period of pedestrian bridges. However, there is a lack of research on this new structure's dynamic characteristics and vibration reduction measures. In this paper, the finite element (FE) model of the Wing-spread Bridge is firstly established, and the modal analysis is conducted based on the FE model. Subsequently, the maximum acceleration of each mode under pedestrian dynamic load is calculated. The result shows that the maximum acceleration of the first- order lateral bending mode exceeds the best comfortable indicator. Finally, two tuned mass dampers (TMD) are designed to be installed at the top of the arches, and the vibration amplitude of the bridge with TMD meets the requirements.