【摘要】 基于区域模型和场模型的计算方法,分别计算了大空间建筑火灾的热烟气温度与时间的关系曲线(T-t曲线)。通过比较计算结果可得出:区域模型计算方法对大空间建筑火灾热烟气的填充规律及填充过程中的温度预测具有足够的精度;但随着热烟气层的下降,当下层冷空气逐渐减少至80%被热烟气所取代时,该计算方法对烟气温度预测的准确性不太高。建议对大空间建筑火灾中结构反应全过程分析的T-t曲线,采用基于场模型的计算方法,或者,对基于区域模型的T-t曲线进行修正。更多还原

【Abstract】 Methods based on zone model and field are employed to calculate the temperature-time curve(i.e.T-t curve) of large space fire.Comparing the results,following three conclusions are drawn.First,the method based on zone model is accurate enough to predict the smoke filling rule and temperature through the whole smoke filling process in large space fire.But when the lower layer space is 80% hot smoke instead of cold air,the method based on zone model is inaccurate.Second,T-t curve based on field model should be applied to complete process of structure behavior.Finally,in order to apply T-t curve based on zone model to complete process of structure behavior it is necessary to revise T-t curve from the model.更多还原