Nonlinear Finite Element Analysis Of Fire Behaviors On Steel Deck-concrete Composites Continuous Slab

With the developing of high-rise buildings, the use of steel deck-concrete composites slab increased rapidly in recent years. Steel deck-concrete composites slab, as a very reasonable structure where steel and concrete material strength are completely utilized. At present, when the steel deck-concrete composites slab is used in high-rise buildings, we often reinforce the concrete slab by stressed steel bar according to the structure stress in addition, therefore, this design method does not give full play to the performance of materials. The main reason is that we are lack of the fire-resistance behaviors of steel deck-concrete composites slab.This paper will based on the experiment, as finite element software, ANSYS is used to analyze performance of steel deck-concrete composites slab under fire, and then compared with the experimental value. Some major research jobs are following.1) As finite element software, ANSYS is used to analyze the temperature field and fire-resistance behaviors of steel deck-concrete composites slab, through analyzing, we can clear the element type,material properties and procedure steps, so as to providing reference for the analysis of steel deck-concrete composites slab under fire in the future.2) The temperature field of steel deck-concrete composites slab under fire is simulated. The validity and reliability of analyzing the temperature field of steel deck-concrete composites slab under fire with finite element software ANSYS is testified by comparing the analytical value with experimental value.3) The fire-resistance behaviors of steel deck-concrete composites continuous slab under fire is simulated. The fire-resistance behaviors of steel deck-concrete composites continuous slab is simulated under four fire situations, and then testifies the validity and reliability of model through comparing with experimental value.4) The influencing factors of temperature field and fire-resistance behaviors of steel deck-concrete composites continuous slab is analyzed. The senstive factors is revealed about steel deck-concrete composites continuous slab, and consequently, this paper can provide theoretical guidance for the application of steel deck-concrete composites continuous slab in practical engineering.