| 公路隧道衬砌火灾后力学行为分析 |
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| 引用本文： | 李强,郭军,夏铃.公路隧道衬砌火灾后力学行为分析[J].重庆交通大学学报(自然科学版),2010,29(5). |
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| 作者姓名： | 李强 郭军 夏铃 |
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| 作者单位： | 重庆交通大学,土木建筑工程学院,重庆,400074;招商局,重庆交通科研设计院有限公司,重庆,400067;隧道建设与养护技术交通行业重点实验室,重庆,400067 |
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| 基金项目： | 西部交通建设科技项目(2008318740041) |
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| 摘 要： | 公路隧道发生火灾后,衬砌结构将发生物理与力学性能的改变,如厚度变薄和弹模降低等。首先分析混凝土构件在火灾后的损伤机理、力学特性和耐火性能,然后根据混凝土火损等级,进一步研究衬砌结构厚度与弹性模量的变化对衬砌结构体系的影响。采用荷载-结构法分析超高次公路隧道结构体系在火损后的力学行为,探寻其残余承载能力及内力与变形规律,找出特征破坏点与破坏机制。
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| 关 键 词： | 公路隧道 火灾 二次衬砌 荷载-结构法 |
Mechanical Behavior Analysis on Highway Tunnel Lining after Fire Hazard |
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| LI Qiang,GUO Jun,XIA Ling.Mechanical Behavior Analysis on Highway Tunnel Lining after Fire Hazard[J].Journal of Chongqing Jiaotong University,2010,29(5). |
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| Authors: | LI Qiang GUO Jun XIA Ling |
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| Institution: | LI Qiang1,GUO Jun2,3,XIA Ling1(1.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China,2.Chongqing Communication Research & Design Institute Co.Ltd,China Merchants Bureau Chongqing 400067,3.Key Laboratory of Tunnel Construction & Maintenance Technology,Ministry of Communications,Chongqing 400067,China) |
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| Abstract: | After the fire hazard in highway tunnel,lining structures would change in physical and mechanical properties,such as reduction in thickness and elastic modulus.Firstly,damage mechanisms,mechanical properties and refractory characteristics of the concrete component after fire are analyzed;what's more,according to fire loss grades of the concrete,further research is done on the influences of the thickness and elastic modulus on the lining structure system.Using the loading-structure method,the mechanical beha... |
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| Keywords: | highway tunnel fire hazard secondary lining loading-structure method |
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