火荷载下沉管隧道的温度场分析  

Study on the temperature field in an immersed tube tunnel under a fire loading

作　　者：贺小强[1] 张孟喜[1] 

机构地区：[1]上海大学土木工程系,上海200072

出　　处：《现代隧道技术》2006年第2期22-24,58,共4页Modern Tunnelling Technology

摘　　要：文章以上海外环线越江沉管隧道为背景,用通用有限元程序模拟火荷载作用下沉管结构的瞬态温度场的变化情况。文中采用三维有限元模型,分析温度场在不同时间和空间的发展变化情况,从而更直观地掌握温度在隧道横截面上的分布情况,可为隧道的防火设计和救灾工作提供依据。分析中考虑了混凝土热工参数随温度变化的非线性关系,并把分析结果与试验数据进行了比较,从而得出了比较合理的分析方法和参数设置。Based on the Outer Ring river - crossing immersed tube tunnel in Shanghai, analysis of the thermal field in the tunnel under a fire loading was carried out by finite element method. Temperature distribution in the tunnel cross -sections is analyzed by using a three -dimensional model. In the analysis concrete is taken as a non- linear inelastic material possessing variable thermal parameters with temperature changes. Reasonable approach of analysis and parameters are obtained by comparing the results of analyses with experimental data.

关 键 词：沉管隧道 温度场 有限元模型 

分 类 号：U451[建筑科学—桥梁与隧道工程]