Study on Barrier Effect of Sandwich Galvanized Steel Composite Wallboard on Outdoor Fire Spread of Timber Buildings
A new type of sandwich galvanized steel composite wallboard is proposed to delay and prevent the outdoor fire spread of timber buildings.The numerical model of the perforated timber buildings in southwest China was established by PyroSim,and the reasonable arrangement methods of composite wallboard were compared analyzed from the point of view of outdoor temperature and outdoor fire spread time during the occurrence of fires.Simulation results show that considering the influence of uncertain factors such as terrain and atmospheric environment,it is recommended that the fire separation distance of rural timber buildings in southwest China should be greater than 6.0 m.For the timber buildings with blocked gable ventilation,when the building interval in the front and rear direction is 3.0 m,the layout of composite wallboard can prolong the time of the fire spreading to the adjacent building by about 60 s.When the building interval in the front and rear direction is 4.0 m,the layout of composite wallboard will effectively prevent the outdoor fire spread.In addition,for the timber buildings with unblocked gable ventilation,reasonable fire separation distance should be set as a means to control the outdoor fire spread.For the timber buildings with blocked gable ventilation,composite wallboard laying on the front and rear facades can prevent outdoor fire spread besides its high cost performance.
timber buildingoutdoor fire spreadcomposite wallboardfire separation distance
万方数据
维普
