Secondary Fire Simulation Of Urban Earthquake Based On Earthquake Damage Simulation And Cellular Automata

Urban earthquake-induced secondary fires refer to the fires caused by earthquakes in urban areas.When a destructive earthquake occurs,in addition to the damage to buildings and other structures,it can also lead to damage to gas pipelines,power lines,and other infrastructure,which can cause fires and pose a serious threat to people’s lives and property.Therefore,reasonable estimation of the speed,pattern,and range of postearthquake fire spread is of great significance for pre-disaster prevention and post-disaster rescue.With the development of simulation technology,many methods for simulating urban earthquake-induced secondary fires have emerged,which have promoted the research and development in this field.However,there is room for improvement in how to obtain high time efficiency and precision building seismic damage data,how to quantitatively analyze the influencing factors of fire spread,and how to achieve threedimensional dynamic display effects with these methods.This article focuses on these issues and conducts research on urban earthquake-induced secondary fires using a refined seismic damage simulation model and a cellular automaton model for urban fire spread.The main research contents of this article include:(1)Based on post-earthquake field investigations and high-resolution remote sensing images,we collected and statistically analyzed relevant information on the buildings in Yangbi County after the earthquake,and used a refined seismic damage simulation model to simulate the damage and verify its effectiveness.(2)Based on the disaster information of the Lijiang ancient city fire and the GIS data of the buildings,we used a cellular automaton model for urban fire spread to simulate the fire spread and verify the rationality of the model.We also conducted quantitative studies on key influencing factors.(3)In order to intuitively display the process and characteristics of urban fire spread,we conducted a stereoscopic study of urban fire spread based on the results of a twodimensional cellular automaton model for urban fire spread,and obtained one pseudothree-dimensional and one true three-dimensional dynamic visualization method for urban fire spread.(4)Through refined simulation models,cellular automaton models for urban fire spread,and three-dimensional dynamic visualization methods for urban fire spread,we conducted case analysis studies on Yangbi County and Wuwei City regarding urban earthquake-induced secondary fires.