Simulation Study On Fire Risk Assessment Of Old Residential Districts In Beijing

Fires are one of the most common and frequent major disasters that threaten social development and public safety.Due to the complex construction structure,intensive personnel,and inadequate fire protection facilities in the old community,once the old community fire occurs,the number of deaths,injuries and direct economic losses will be huge.Therefore,studying the fire risks and assessment methods of old communities also provides a reference for further strengthening the work of improving the fire safety management and self-defense capabilities of old communities.This study takes a residential building in an old residential district in Beijing as the research object,and uses and applies theoretical research and experimental results of building fires at home and abroad,applies Pyrosim and FDS software to carry out construction simulations,and performs numerical simulation operations on its fire smoke to obtain the old Fire smoke spread law,visibility,CO mole fraction,fire field temperature and other fire smoke changes in the old residential quarters.In this paper,three types of working conditions are set up:indoor fire simulation,indoor fire simulation after adding fire water supply,simulation analysis of corridor staircase after adding fire water supply condition,and three different fire source powers in the latter two simulated working conditions.By comparison,the time to reach the dangerous state in each room and corridor of each floor and the evacuation time available on each floor are finally obtained,and the effect of adding fire water supply measures on the development of different fires is explored.The research results can provide theoretical basis and reference for the prevention of fire risks,the safe evacuation of personnel and emergency rescue in old communities.