Structure and Performance of Cable-arch Bridge

Abstract:

A bridge structure system, the cablearch bridge, is presented in this paper. The main feature of the structure is that the cable is anchored on the arch foot or nearby and the load is borne by the arch and the cable. The arch is both load bearing and anchored, and the cable is both load bearing and tie bar. The structure of the bridge is given, and the structural strength, the stiffness, the stability and the dynamic characteristics of the bridge are analyzed by finite element method. The results show that the stability and the strength bearing capacity of the bridge are greatly improved and the rigidity is slightly decreased compared with the tied arch bridge with the same span and cross section. In addition, the cablearch bridge is easier to achieve the unity of force and beauty, and its high stability provides a new effective way to improve the span of arch structure.