Experimental and dynamic response analysis of cable-stayed bridge due to sudden cable loss

抄録

Cable-stayed bridges are generally designed with sufficient redundancy which provides the capacity to maintain stability under effect of one cable loss. In such event, factor for impact force of 2.0 is specified by Post-Tensioning Institute's recommendations. This study aims to evaluate the factor provided by the PTI and confirm the structural response of a cable-stayed bridge model encounter sudden cable rupture. An experimental program was performed to simulate the cable rupture event, with specimen being chosen strictly based on the rule of similarity. The obtained strain - time wave forms were used to calculate important parameter such as impact force factor, rupture time, strain velocity, and vibration frequency. The dynamic response analysis method using the strain wave form from the experimental program was suggested and showed its advantage over the static analysis recommended by PTI.