摘要
国内外大量的火灾案例表明,隧道内一旦发生火灾,除了会对隧道内的人员、设备造成损害外,也会对衬砌结构产生不同程度的损伤,进而影响衬砌结构的力学性能,严重降低衬砌结构的安全性。借助缩尺及足尺火灾试验、理论分析等手段,对衬砌结构防火涉及到的火灾场景、衬砌结构高温力学行为及安全性评估方法开展了研究,系统得到了衬砌结构管片、接头及衬砌环在火灾高温时(高温后)的力学行为,并建立了能全面反映温度随时间、空间变化的火灾场景及其设计方法与衬砌结构火灾安全性的模糊综合评估方法。
Numerous tunnel fires indicated that fire not only resulted in loss of property and people＇s life,but also caused severe damages to tunnel lining structure.These damages will deteriorate mechanical performance of tunnel lining structure and severely decrease the safety level of tunnel lining structure.Based on reduced-scale and full-scaled fire experiments and theoretical analysis,studies on design method of fire scenario,mechanical behaviors of tunnel lining structure under high temperature and fire safety evaluation of lining structure are conducted.Mechanical behaviors of segment,joint and lining structure under and after high temperature are presented.Furthermore,new design method of fire scenario and comprehensive fuzzy evaluation method on fire safety of lining structure are established.
出处
《地下空间与工程学报》
CSCD
北大核心
2010年第4期695-700,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金资助项目(50808137)
西部交通科技项目(200831874041)
关键词
火灾
衬砌结构
火灾场景
高温力学特性
安全性评估
fire
tunnel lining
fire scenario
mechanical behaviors under high temperature
safety evaluation
