Analysis of the Existing Reinforced Concrete Rigid Frame Arch Bridge Strengthened with Arch and Cable System

The project and method of the existing rigid frame arch bridge reinforced by changing arch structural system into arch and cable system is presented.Based on a typical bridge,the analysis of the static behavior of the bridge before and after the strengthening is preformed.The results show that the mid-span bending moment and deflection of the reinforced bridge are reduced obviously and the capacity of carrying load is greatly improved.It is proved that it is an effective method to reinforce the existing rigid frame arch bridges built early and enhance its capacity of carrying load.It has definite theory significance and practical engineering value.Constructional procedure of the bridge reinforced by changing arch structural system into arch and cable system and the reasonable cable force is also presented.