Abstract：Based on a rigid-frame tied through CFST arch bridge, the finite element model was built with the ANSYS/LS-DYNA software. The process of cable loss was simulated with the contact-impact method to analyze the variation of the internal forces of different structure members before and after cable loss and determine the potential failure mode. The results show that cables, CFST arch ribs and deck slabs are all influenced by the impact produced by the process of cable loss. Among them, the influence of cable loss on the adjacent cables is the largest and the variation of axial force can exceed three times of the initial force. Therefore, the effect of dynamic force, which is far greater than the static response during the cable loss, should be considered. It is also concluded that the influence of cable loss on the main girder is significantly greater than that on the arch ribs. The local collapse of floor system can be found due to the insufficient strength of the weld connection between the transverse and longitudinal beams.
2014, Vol. 33 
