Numerical Simulation and Analysis of On-building High-rise Building Fires

In order to research the spread of a fire and the distribution of temperature and gas in high-rise building fires, setting the CCTV North Building Fire as the background, the fire was simulated and analyzed by FDS. The experiment indicates that the basic spread law of fire that mainly spreads on one hand through combustible material on the surface of buildings and then comes to inside, on the other hand spreads from the kindling point to the interior of building and then through lift and corridor from downstairs and finally inside out. The air temperature and gas concentration firstly increase with increasing distance from the fire surface, and then decrease. By changing the maximum combustion temperature and transmit power of the surface decoration materials, it can reduce the influence of surrounding buildings which comes from thermal radiation.