Stress Optimization of Anchorage Zone on Tower of Cable-stayed Bridge with Three Cable Planes

The paper takes the largest span highway and railway cable-stayed bridge as the background,based on its special three cells sectional tower with three cable planes,the finite element model of anchorage zone is set up with program of ANSYS.Combined with the whole mechanical characteristics,the stress field of anchorage zone segment is analyzed under main loads combination.According to its larger value of the transverse-stress,the optimal method for the transverse prestress is presented.By comparison of the local stress fields,the resultant stresses of anchorage zone are satisfied for design code and engineering needs.