The mechanical responses of steel cables exposed to large space fires can be employed to assess fire-resistance feature of the cable network.Mechanical analysis model for steel cable is based on nonlinear finite element method.The model can simulate the mechanical response of steel cable in the history of large space fires.The key factors that affect the mechanical response of cable can be derived from the simulated database using parameter analysis method.The horizontal tension decreases through the whole temperature history and decreases sharply with the increase of prestress ratio

the enhancement of temperature heterogeneity and the elongation of cable span.The horizontal tension depends slightly on the loading ratio.These conclusions agree well with the mathematical solution and can be provided to fire-resistance analysis of cable network.