Concrete at high temperature with application to tunnel fire
Concrete at high temperature with application to tunnel fire
复制标题
DOI：
10.1007/s00466-002-0318-y
复制
发表时间：
2002-07-01
影响因子：
4.1
通讯作者：
Pesavento, F
中科院分区：
文献类型：
--
作者：
Schrefler, BA;Brunello, P;Pesavento, F
本文提出了一种火灾下隧道结构评估的新方法。特别是，它由两个步骤组成：第一个步骤是对整个隧道的对流和辐射热通量进行现实评估。在最近发生在欧洲一些隧道的火灾中，火灾持续时间比预期的要长，产生的温度场比标准规范中考虑的要严重得多。因此，这样的评估是非常重要的。第二步，将混凝土视为多相多孔材料，利用先前计算的热通量作为全耦合程序的温度输入，对混凝土结构的湿热力学行为进行模拟。
In this paper a new procedure for structural assessment of tunnel constructions during fire is presented. In particular, it consists of two steps: the first one deals with a realistic evaluation of thermal fluxes, both convective and radiative, for the whole tunnel. In the fires recently occurred in some European tunnels, the duration of the fire was longer than expected and the produced temperature fields were much more severe than those considered in standard codes. Therefore, such a kind of evaluation is of great importance. As second step, a simulation of the hygro-thermo-mechanical behaviour of concrete structure will be carried out using thermal fluxes previously calculated as thermal input for a fully coupled code, which considers concrete as a multiphase porous material.