Extradosed cable-stayed bridge is a hybrid structure, whose mechanic characteristic lies between continuous beam bridge and cable-stayed bridge. Based on an extradosed cable-stayed curved bridge with corrugated steel webs in Tianjin, this paper established the finite element model of the whole bridge construction stages by Midas Civil and focused on the effects of cable force on the structure. Five gradients of cable force were set for structural calculation and analysis. The results show that the influence of cable force variation on the alignment and section stress of the main beam can be approximately regarded as a linear relationship, and the sensitivity of different positions to the variation of cable force is different.
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