Effect of Cable Degradation on Dynamic Behavior of Cable Stayed Bridges

In the present work a cable stayed bridge of fan type arrangement is analysed for static and dynamic load. The analysis is done with all the cables under normal condition, different percentage of corrosion of one cable and the failure of one cable due to excessive corrosion. The analysis is performed using finite element method software MIDAS Civil. The software is validated with simple bridge model. The bridge is analysed for moving load case as per the IRC 6-2000 and also for earthquake load (Time History of El Centro) and for different load combinations. The effect on axial forces in cable, deflection of deck, natural frequency, mode shape of the structure and earthquake response of the Cable Stayed bridge is studied.