Progressive Collapse Analysis of Cable-Stayed Bridges

Abstract

Several codes have proposed guidelines to prevent progressive collapse. Although most of these standards are in progress, few recommendations for progressive collapse analysis and design of cable bridges or even bridges can be found. In this paper, progressive collapse analysis of a cable-stayed bridge is investigated. In this regard, the effects of changes in Fy, E and cross-section area of cables to progressive collapse resistance are studied. The evaluation is performed by alternate load path method and the nonlinear time history tool in SAP2000V17 software. The results of the analysis show that as the cross section and the modulus of elasticity of the cables increase, displacement of bridge decreases and the bridge’s resistance increases against failures. Also, for the case where Fy of cables were increased, displacement of the bridge did not differ, and only the formation of the plastic hinges in the cables changed.