Method and system for calculating temporary tie-rod cable force of tied-arch bridge

The invention discloses a method and a system for calculating temporary tie bar cable force of a tied-arch bridge. The method comprises the following steps of: calculating torque of a suspender and an arch column to an arch foot under the action of concentrated load; calculating the torque of the vertical component force vector of the buckle cable to the arch springing and the thrust caused by the horizontal component force of the buckle cable under the action of the concentrated load; based on the torques of the suspenders and the on-arch stand columns to the arch feet and the torques of the vertical component force vectors of the buckle cables to the arch feet, the torques of the vertical concentrated force to the arch feet are obtained; calculating a bending moment value at an arch foot of the main arch rib under the action of the uniformly distributed load; on the basis of the bending moment value at the arch foot of the main arch rib and the moment generated by the vertical concentrated force on the arch