预应力混凝土结构抗火研究进展  

Progress of research on fire resistance of prestressed concrete structures

作　　者：郑文忠[1] 闫凯[1] 王英[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《建筑结构学报》2011年第12期52-61,共10页Journal of Building Structures

基　　金：国家教育部长江学者奖励计划项目(2009-37);教育部博士点基金项目(20092302110046);黑龙江省自然科学基金项目(E200916)

摘　　要：总结了近年来预应力混凝土结构抗火研究进展,包括预应力筋高温力学性能、预应力混凝土梁板抗火试验、足尺预应力混凝土梁板抗火性能、活性粉末混凝土高温力学性能、高温下混凝土的爆裂规律、CFRP布加固混凝土梁板抗火性能、预应力混凝土梁板以及用耐高温无机胶粘贴CFRP布加固的混凝土梁板抗火设计方法等,分析了预应力混凝土结构和CFRP布加固混凝土结构抗火研究中尚存在的一些问题。分析表明:大尺度预应力混凝土梁的抗火性能优于小尺度梁,用耐高温无机胶替代环氧类有机胶粘贴CFRP布加固混凝土梁板并以此提高结构的抗火性能是可行的,大尺度预应力构件及预应力整体结构的抗火性能及其抗火设计方法等是今后一段时间预应力混凝土结构抗火研究领域值得关注的课题。This paper presents the progress of research on in fire resistance of prestressed concrete structures,and discusses some issues that still need to be investigated.The progress mainly includes research on the mechanical properties of prestressing steel wires at high temperature and after high temperature,experimental study on fire resistance of prestressed concrete beams and slabs,fire resistance of full-scale prestressed concrete beams and slabs,mechanical property of reactive powder concrete,spalling behavior of concrete,fire resistance of concrete beams and slabs strengthened with CFRP sheets,fire design method of presressed concrete structures and presressed concrete structures strengthened with CFRP sheets.Analysis result shows that fire resistance of large scale beams are better than that of small scale beams.It is feasible to improve the fire resistance of structures by strengthening concrete beams and slabs with CFRP sheets bonded with inorganic adhesive.Fire resistance and fire design method of full-scale prestressed concrete and global prestressed concrete structures are main problems for prestressed concrete structures in fire and need to be studied in the future.

关 键 词：混凝土结构 预应力混凝土结构 抗火 

分 类 号：TU378[建筑科学—结构工程] TU352.5