NLFEA Fire Resistance of 3D System Ceiling Panel

摘要

In concrete structures, determining the fire endurance time is fundamental so as ensure that structural elements be able to withstand an aggressive fire for a reasonable time period. Slabs are the most susceptible to fire damage because of their large surface area and shallow depth. Analyzing their bearing capability after sustaining fire requires the knowledge of temperature distribution in the cross sections, as well as thermal properties of concrete and embedded steel. In this paper, fire endurance a typical 3D ceiling panel is investigated analytically by using ANSYS in terms of time to failure and physical changes associated with exposure to failure. A nonlinear finite element (NLFEA) model was developed and validated by the experimental data before predictions were extended to investigate the significance of concrete density, concrete mechanical properties, and bottom concrete layer cover on the fire endurance time.