特长公路隧道独立排烟道结构高温安全性研究  

Study on Structural Safety of Independent Exhaust Channel of Super-long Highway Tunnel in High Temperature

作　　者：王薇[1] 徐志胜[1] 廖仕超[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《防灾减灾工程学报》2009年第5期561-565,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：浙江省科技计划项目(2008C13041-2)资助

摘　　要：特长公路隧道的火灾安全尤其是火灾通风排烟问题日益受到特别的关注。苍岭隧道是一座长度超过7 km的公路隧道,根据多方咨询意见,其通风排烟系统采用带独立排烟道的纵向通风模式。为了判断排烟道顶隔板结构在火灾高温下的安全性,以火灾动态模拟软件FDS的分析结果为温度边界条件,通过ANSYS对火灾下与常温下顶隔板的内力及变形进行了对比分析,探讨了顶隔板在火灾下的破坏规律,得出了火灾下顶隔板的临界破坏温度及其沿隧道的纵向破坏范围。Cangling tunnel, a more than 7 km long highway tunnel, has received a great attention on its fire safety, especially its ventilation and smoke exhaust in fires. According to the suggestions from many consultants, a mode of longitudinal ventilation and smoke exhaust with an independent exhaust channel was employed in the system design of ventilation and exhaust. In order to judge the safety of the top-clapboard of the exhaust channel in fires, the deformation and internal force of the top-clapboard in both eases of normal temperature and a fire were comparatively analyzed with the software ANSYS, the temperature boundary conditions being based on the Fire Dynamics Simulator（FDS） results, to study the failure regularity of the top-clapboard in fires. The study reveals the critical failure temperature and the longitudinal damage extent of the top-clapboard in fires.

关 键 词：独立排烟道 顶隔板 高温承载性能 FDS(火灾动态模拟软件) 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]