The Effect of Heavy Loads and Cable Breakage on the Line Shape of Main Girders of One-Tower Cable-Stayed Bridges

To study the adverse vibrations of overloading and cable breakage, a single tower cable-stayed bridge model was established using finite element software ANSYS. The fracture effects of cables at different positions were simulated, and the overall linear changes of the bridge before and after fracture were analyzed. Equivalent vehicle loads were applied to obtain the influence of the most unfavorable fracture on the main beam line shape when the load was distributed at the most unfavorable position. The analysis results show that the impact of cable breakage varies at different positions. Cable breakage at locations with higher cable forces and bending moments will cause more significant vibration in the main beam, resulting in more significant changes in the main beam line shape. It is only when the three cables break that the displacement exceeds the allowable value in the specifications.