| With the rapid development of the cable-stayed bridge in the field of bridge design, the safetyand durability issues have been extensive attention. In this paper, a cable-stayed bridge has beentaken as the basis, the finite element model was established, and security reserve of thecable-stayed bridge at ultimate state was analyzed aimming at cable loss. The main contentsinclude the following：(1) The cause of cable damage was analyzed in the paper, describes the influence ofchemical and physical behavior of cable loss was mainly described, which focuses on the effectsof wind and rain for cable vibration of cable.(2) In this paper, according to referring to the correlation literature, study on the stabilityand ultimate bearing capacity calculation method was given, a numerical model using finiteelement analysis software was established, the stability of nonlinear finite element modelconsiding geometry and material nonlinearity in different kinds of constant load was analyzed, thecorresponding stability safety factor was obtained, and the ultimate bearing capacity of bridge wascalculated. At the same time, through simulating the cable fracture in different position of, in theultimate bearing capacity of the cable-stayed bridge was given, and the corresponding stabilitysafety factor was obtained.(3) According to analyze strain cloud picture and load-displacement curve at ultimate stateunder different cable fracture condition, the influence rule of the cable fracture on structurebehavior was obtained.The analysis results can provide something useful for the health detectionand maintenance repair in the using process. |
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