Study on the external wall insulation system for fire prevention based on numerical simulation

Aiming at the status that the domestic existing exterior insulation system had poor fire resistance,through the analysis of apartment fire by exterior wall thermal insulation layer in Shanghai,three important factors exterior insulation fireproof were obtained induding binding or fixed mode,fire belt construction,fire protection layer.In view of the popular heat preservation material like EPS,it was selected to be the simulated material,and the following conclusions were obtained by numerical simulation:it was thought that in fire cavity insulation layer is more dangerous than no free cavity insulation;Setting fire belt can effectively block the spread of fire zone,and broader insulation belt has better effect.In addition,the design of insulation layer fire still should consider the following three problems,namely selecting proper insulation materials,suggesting insulation layer also use similar fire prevention measures liking fire compartment and increasing the midth of five bele at the same time of guaranteeing the thermal insulation.Research conclusions and recommendations for solving the problem of exterior wall thermal insulation system fire have important reference value and practical significance.