赫飞;刘剑;崔铁军;

• 1:辽宁工程技术大学安全科学与工程学院
• 2:大连交通大学辽宁省隧道与地下结构工程技术研究中心

摘要(Abstract)：

为了研究既有地铁车站发生火灾时,其混凝土主体结构中温度的变化情况,以某地铁站主体结构为对象,使用FLAC3D对该地铁站进行了模拟,构建了火源产生的除混凝土结构外的热对流和热辐射叠加温度场。根据温度不同材料性质不同的现象,在模拟过程中随温度升高实时调整材料参数,使模拟结果更加准确。模拟了从4℃到1000℃期间的3个设定位置火源使结构温度场的变化。结果表明:在定量角度,车站各部分温度变化与火源温度变化存在一定的数值关系;定性得到,结构越连续,空间刚度越大,热能在车站混凝土结构中传播越快,温度分布越均匀。对该地铁站提出了一些应重点防护的位置。

关键词(KeyWords)： 安全学;火灾;地铁车站结构;火灾温场构建;混凝土结构温度分布;模拟与分析

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 赫飞;刘剑;崔铁军;

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