Simplified estimation method for fire heating curve in tall and large space

The invention relates to the related field of fire disasters, in particular to a simplified estimation method for a high and large space fire disaster temperature rise curve, which is used for quickly estimating the hot smoke temperature rise condition of a roof above a fire source when a fire disaster occurs in a high and large space with a relatively high hole so as to carry out fireproof protection design of a high and large space steel structure roof. A hot flue gas temperature-time curve is simplified by adopting a three-broken-line model and comprises three stages of a fire source power rising stage, a hot flue gas accumulation stage and a stable development stage, and the temperature and time corresponding to the three-broken-line model can be calculated by adopting equations related to the space length, width and height, the highest door opening height and the fire source power. 本发明涉及火灾相关领域，具体为一种高大空间火灾升温曲线简化估算方法，本发明用于快速估算具有较高洞口的高大空间内发生火灾时火源上方屋盖的热烟气升温情况，从而进行高大空间钢结构屋盖的防火保护设计，热烟气温度-时间曲线采用三折线模型简化，包含火源功率上升