摘要
对国际上几次大型火灾试验的数据重新进行了分析，发现全盛期火灾温度的发展可由最高气体温度Ｔｇｍ和持时τ较好地确定。在此基础上，建立了全盛期隔间内气体温度的发展模型，该模型物理意义明确，较全面地反映了以往的研究成果。文中还对混凝土构件在标准加热条件下的等效曝火时间进行了分析，并建立了简洁的表达形式，按热荷等效和损伤等效两种方法的结果具有较好的一致性。
Utilizing the increasing knowledge on fire science,the experimental datum of compartment fires is the past two decades are reviewed and analyzed.The review presents that the experimental temperature time curves are of the same shape,and the fuel and ventilation only affect the maximum averaged gas temperature and fire duration.For the ventilation controlled fires. ventilation factor can determine the maximum averaged gas temperature;for the fuel controlled fires,ventilation factor and critical ventilation factor(determined by fuel surface)can determine the maximum averaged gas temperature. A model of fully developed compartment fire is estabilshed.According to the model,the analytical expression of effective fire resistance of concrete structure is present.Theoretical analysis indicates the coincidence between equivalent heat load and equivalent section residual capacity.
出处
《哈尔滨建筑大学学报》
EI
1998年第1期16-24,共9页
Journal of Harbin University of Civil Engineering and Architecture
基金
国家自然科学基金
黑龙江省自然科学基金
关键词
全盛期火灾
模型
火灾温度
结构防火
混凝土
fully developed fire
fire model
ciritical regime
effective fire resistance
