Evaluation of the bearing capacity of a Two-way curved arch bridge

This paper mainly discusses the problems of evaluating the bearing capacity of a two-way curved arch bridge. According to the stress characteristics that the main basic structures of the arch bridge are main arch ring, the finite element analysis program(ANSYS) is adopted to conduct the stress analysis and bearing capacity evaluation of a two-way curved arch bridge, and the procedures are as follows: based on the stress characteristics of the arch bridge, the composite section formed by the arch rib and arch wave is regarded as the section of the main arch ring; the dead load of the upper structures and deck system of the arch is considered as the concentrated or distributed load acting on the main arch ring; on the basis of the code of bridge design, the mechanical properties of the bridge are calculated; in the light of the calculating results, the bearing capacity of the bridge are evaluated. The results reveal that the axial and shearing forces both meat with demand when acted up under the original design load, whereas the eccentricities of the skew back and the vault's sections do not. Therefore, the reinforcement and rebuilding are necessarily required so as to meet with the demand of development transportation and communication.