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Aerodynamic stability is an important problem in the design and research of long-span multi-tower cable-stayed Bridges. The three-dimensional nonlinear aerodynamic stability analysis method is used to qualitatively analyze the aerodynamic stability of a new type of rhombic stiffened cable-stayed bridge in this paper, and compared with conventional cable-stayed bridges. The results show that the new rhombus stiffener can greatly increase the longitudinal stiffness of the structure and reduce the vibration period of the structure. The maximum lateral displacement, vertical displacement and torsion Angle of the structure under wind load are reduced, and the critical unstable wind speed of the structure is increased. It can be seen that the aerodynamic stability of the new type of rhombus cable-stayed bridge is better than conventional cable-stayed bridge.

The aerodynamic stability of a new type of Multi-tower cable-stayed bridge with rhombic stiffening cables