Key Technology Research on Stone Arch Bridge Strengthened by Composite Main Arch Circle Method

A finite element analysis relying on actual project was conducted in view of the phenomenon that,the arch reinforcement of composite section bearing capacity calculated by converting section area and moment of inertia cannot reflect to the stress state of each part.The results shows the maximum compressive stress of original arch section have reduced after reinforcement,while the new reinforced layer is under the negative state of tensile stress.It illustrates the mechanical characteristics of the reinforcement technique.