In order to find out the temperature distribution charac-teristics of the lining under fire,a one-dimensional numerical cal-culation method of heat transfer lining temperature was estab-lished based on the mathematical model of tunnel fire-lining radia-tive convective heat transfer.The HC standard fire curve and the fire condition of 30 MW fire heat release rate were calculated and analyzed.The results show that the maximum temperature of the standard fire curve is generally greater than that required by the current Chinese code.Using fire temperature as the boundary con-dition for the lining wall will significantly increase the temperature wad on the lining.The maximum temperature of the lining is 778 ℃ and 351 ℃ under the 2 hour HC fire curve and the 30 MW fire condition,respectively.The influence range and high temperature value of the lining inside the standard fire curve condition are sig-nificantly greater than those of the 30 MW fire condition.
关键词
隧道火灾/传热方法/热释放率/温度分布/性能化设计
Key words
tunnel lining/heat transfer methods/heat release rate/standard fire curves/temperature characteristics
维普
万方数据