Abstract:

In order to reduce the fire safety risk of urban buildings and improve the ability of building units to resist fire accidents, the influencing factors of fire safety were identified from three aspects: building fire protection design, building fire protection facilities and fire safety management, and the assessment index system of fire safety of urban buildings was constructed. A combined weighting-TOPSIS model of structural entropy and information entropy was applied to assess the fire safety risk of each district and each type of building in the cities. The model was validated with 262 buildings in 5 major areas of X city in western China. Finally, fire safety index and comprehensive ranking were obtained, and then the existing weak points of urban buildings fire protection were clarified. The results indicate that comprehensive evaluation order of fire safety is commercial complexes > primary and secondary schools > heritage buildings > high-rise buildings, city center > north of the city > east of the city > west of the city > south of the city. The fire safety risk of urban fringe counties and high-rises need to be paid attention to. The assessment results calculated with this model are consistent with the current situation.

Key words: urban buildings, fire safety evaluation, combination weight, technique for order preference by similarity to an ideal solution (TOPSIS), index system