Safety Verification of Mechanical Properties of Reinforced Concrete Beam in the Fire by Applying CFD

Advanced countries have adopted performance-based protective design to evaluate safety of buildings for building’s function of fire protection. And they have employed technology of fire protection engineering and quantified data of theoretical numerical model to create an even more flexible evaluation method for building’s fire protection. Buildings suffered varied degree of attack from elevated temperature and thermal radiation, which leads to changes in physical, chemical and mechanical properties, might result in considerable damage to the buildings and their structure. Such damage threatens populace life. This paper uses FDS (Fire Dynamics Simulator) software to analyze thermal flow field of fire. The temperature boundary condition of simulation results are then entered in the CFD (Computer Fluid Dynamics) software PHOENICS to calculate internal temperature and mechanical property of the beam. This study also integrates related experimental literatures as auxiliary to calculate thermal transmission and strength. Purpose of the above is to investigate elevated temperature and reduction of mechanical property, as well as verify safety of structure.