A Study on Progressive Collapse Response of Cable Stayed Bridges using Elastomeric Bearing

In recent studies it has been found that the stays in cable stayed bridges are prone to lose their support at the initial stage due to egregious loads such as earthquake loads, thunder strikes, vehicle impact load and wind loads sudden cable losses are generated in the bridge resulting in an incalculable stress reapportionment on the deck towers as well as the span of the bridge. Design of Cable Bridge is essential considering such a sudden loss. these losses being associated geometrical and material discreteness, the synopsis of egregious loading is analyzed by using linear elastic models in design of cable stayed bridges This paper shows, a nonlinear 3D finite element model of an idealized steel cable-stayed bridge are developed and analyzed with use of elastomeric bearing to determine what is behavior of progressive collapse in bridge with use of elastomeric bearing. The deflection which is equal in both the spans of the bridge converts into major deflection in one span after loss of cable in other span. The use of elastomeric bearing in cable stayed bridges must affect the progressive collapse scenario. The percentage reduction in vibrations of triggered event due to introduction of elastomeric bearing is studied.