中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2010, Vol. 29 ›› Issue (5): 693-696.

• • 上一篇    下一篇

公路隧道衬砌火灾后力学行为分析

李强1, 郭军2,3, 夏铃1   

  1. 1.重庆交通大学土木建筑工程学院, 重庆 400074; 2.招商局重庆交通科研设计院有限公司, 重庆 400067; 3.隧道建设与养护技术交通行业重点实验室, 重庆 400067
  • 收稿日期:2010-06-01 修回日期:2010-07-18 出版日期:2010-10-15 发布日期:2015-01-22
  • 作者简介:李强(1984—),男,山东临沂人,工学硕士,主要从事隧道及地下工程设计理论与施工关键技术方面研究。E-mail:liqiangmmmzzz@sina.com。
  • 基金资助:
    西部交通建设科技项目( 2008318740041)

Mechanical Behavior Analysis on Highway Tunnel Lining after Fire Hazard

LI Qiang1, GUO Jun2,3, XIA Ling1   

  1. 1.School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China; 2.Chongqing Communication Research & Design Institute Co.L td, China Merchants Bureau Chongqing 400067, China; 3.Key Laboratory of Tunnel Construction & Maintenance Technology, Ministry of Communications, Chongqing 400067, China
  • Received:2010-06-01 Revised:2010-07-18 Online:2010-10-15 Published:2015-01-22

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。

关键词: 公路隧道, 火灾, 二次衬砌, 荷载-结构法

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??structurem ethod, the mechanical behavior of the high??order highway tunnel structure after fire hazard is analyzed; its residual capacity and regularity of the internal force and deformation is explored; and destruction points and failure mechanism are found out

Key words: highway tunnel, fire hazard, secondary lining, loading??structure method

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