特长公路隧道排烟道牛腿温度场研究

Research on temperature field of smoke shaft corbel in extra-long tunnels

以特长公路隧道集中排烟道为研究背景,利用大型通用有限元分析软件ANSYS建立计算模型,对火灾情况下无防火涂料保护和有防火涂料保护的排烟道牛腿的温度场分别进行分析,获得排烟道牛腿不同工况下温度场的分布规律,计算结果与试验结果较吻合,为进一步深入研究排烟道牛腿在火灾情况下的力学性能创造了条件。

Based on the background of central exhaust system in extra-long highway tunnels,the temperature field of smoke shaft corbel,with and without fire retardant coatings,was researched with finite element analysis software ANSYS.The temperature field distribution law of smoke shaft corbel was achieved in different conditions.The results show that the numerical results are in good agreement with the experimental data,which provides conditions for further study on mechanical properties of smoke shaft corbel in case of fire.