| 火灾下盾构隧道管片衬砌热力耦合数值分析 |
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| 引用本文： | 徐志胜,万俊,王薇.火灾下盾构隧道管片衬砌热力耦合数值分析[J].中国安全科学学报,2009,19(10). |
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| 作者姓名： | 徐志胜 万俊 王薇 |
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| 作者单位： | 中南大学防灾科学与安全技术研究所,长沙,410075 |
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| 摘 要： | 结合盾构隧道工程实例,利用ANSYS有限元分析软件,建立了隧道衬砌结构的有限元实体模型,对隧道内施加温度荷载,先分析衬砌结构内部温度场的分布情况,在温度场分析的基础上,进一步对混凝土管片衬砌结构进行力学分析,分别得出衬砌结构内的温度分布规律及衬砌结构在高温作用下的应力变化规律,进一步研究其在火灾作用下的破坏部位,从而为评估盾构隧道在火灾作用下的安全性提供理论依据。
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| 关 键 词： | 盾构隧道 衬砌结构 温度场 应力场 耦合分析 |
Numerical Analysis on the Coupling of Thermal Field and Stress Field in the Shield Tunnel Segment under Fire |
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| Abstract: | Combined with engineering example,a finite element model for lining structure was established by ANSYS program.Apply temperature load in tunnel,analyze the temperature distribution of lining structure first,and then based on it,make a mechanical analysis of lining structure under fire,and obtain the rule of temperature distribution and stress variation of lining structure under fire.Finally,further analyze the failure spot of lining structure under fire.This study provides a theoretical basis for further study on safety evaluation of shield tunnel under fire. |
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| Keywords: | shield tunnel lining structure temperature field stress field coupling analysis |
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