耦合作用下钢筋混凝土试件黏结性能退化分析  

ANALYSIS OF BOND PROPERTIES DEGRADATION OF REINFORCED CONCRETE MEMBERS UNDER COUPLING ACTION

作　　者：王柏文 刘扬[1,2] 王龙 张明[1,2] WANG Bowen;LIU Yang;WANG Long;ZHANG Ming(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;Key Laboratory for Safety Control of Bridge Engineering,Ministry of Education and Hunan Province,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,长沙410114 [2]桥梁工程安全控制省部共建教育部重点实验室,长沙410114

出　　处：《工业建筑》2020年第1期125-129,141,共6页Industrial Construction

基　　金：国家重点基础研究发展计划(973计划)(2015CB057705)

摘　　要：目前针对钢筋混凝土结构黏结性能的研究考虑因素较为单一,缺乏考虑多种环境因素耦合作用的影响,与钢筋混凝土结构实际服役环境有较大的差异。尝试从考虑疲劳和锈蚀共同作用的角度出发,设计制作了一批钢筋混凝土试件并分为疲劳、锈蚀及耦合作用3组进行试验。通过试验重点对比分析了耦合作用与单一因素作用后钢筋混凝土试件的黏结性能退化规律、破坏特征及滑移的变化趋势。试验结果表明:耦合作用对黏结性能的影响远大于单一因素的作用;随着环境影响程度加深,黏结性能不断加速衰减,且破坏模式发生变化;少量钢筋在耦合作用后出现断筋现象,其根本原因是两种影响因素之间存在“放大效应”。At present,the research factors for the bond properties of reinforced concrete structures are relatively simple,and the coupling effect of various environmental factors is not considered,which is still quite different from the actual service environment of reinforced concrete structure.From the point of view that considering the interaction of fatigue and corrosion,a group of reinforced concrete specimens were designed and divided into three test groups:fatigue test group,corrosion test group and coupling test group.Through the test results,the bond properties degradation law,failure characteristics and slipping trend of the reinforced concrete under the coupling and single factor effects were analyzed.The experimental results showed that the coupling effect on the bond properties was more remarkable than that of the effect of single factor;with the deepening of the environmental impact,the bond properties decreased and the failure mode changed;the fracture occurred in a small number of steel bars after being subjected to coupling action,the fundamental reason was that there was“amplification effect”between the two influencing factors.

关 键 词：耦合作用 钢筋混凝土 黏结性能 疲劳:锈蚀 

分 类 号：TU375[建筑科学—结构工程]