METHOD FOR DETERMINING NUMBER OF CROSSED HANGERS FOR COOPERATIVE SYSTEM BRIDGE

A method for determining the number of crossed hangers for a cooperative system bridge. The method comprises the following steps: establishing a cooperative system bridge finite element model that comprises a midspan main cable, a hanger and a main beam (SI); providing a hanger in the cooperative system bridge finite element model, and applying a live load to perform finite element analysis on the cooperative system bridge finite element model, so as to obtain an end hanger live load axial force amplitude (S2); and applying the same live load to perform finite element analysis on a cooperative system bridge finite element model in which the number of hangers gradually increases, until the end hanger live load axial force amplitude of the previous cooperative system bridge finite element model is less than the end hanger live load axial force amplitude of the current cooperative system bridge finite element model, and determining the number of hangers set for the current cooperative system bridge finite element model to be the number of crossed hangers of a cooperative system bridge (S3). The problems of a calculation process being very complex, a cooperative system bridge model being large, stay cables needing to be adjusted after hangers are changed, and a trial calculation process taking a long time can be solved.