摘要
针对沿海地区的钢筋混凝土结构在服役过程中所承受的持续荷载与氯离子侵蚀的耦合作用引起钢筋混凝土性能的劣化,会对钢筋混凝土间的粘结性能产生影响,设计制作了24根粘结区带裂缝的钢筋混凝土梁式试件,通过粘结性能试验,研究在持续荷载单独作用、氯离子侵蚀单独作用以及持续荷载与氯离子侵蚀耦合作用等3种工况下,持续120d的钢筋混凝土粘结强度变化情况.试验结果表明:持续荷载和氯离子侵蚀的耦合作用显著降低了钢筋与混凝土的粘结强度,且持续荷载越大,粘结强度越低;在持续荷载和氯离子侵蚀的耦合作用下,试件粘结强度的损失要大于仅在单因素单独作用下粘结强度的损失.
Due to the coupling effect of sustained load and chloride ion erosion on reinforced concrete structures in coastal areas during service,the deterioration of reinforced concrete performance is caused,and the bond performance among reinforced concretes is affected.24 reinforced concrete beam specimens with crack in bonding zone were designed and manufactured.The bond strength changes of reinforced concrete for 120 days under three work conditions of sustained load,chloride ion erosion and coupling action of sustained load and chloride ion erosion were investigated by beam test.The experimental results show that the coupling effect of sustained load and chloride ion erosion significantly reduces the bond strength between steel bar and concrete.The larger the sustained load is,the lower the bond strength becomes.Under the coupling action of sustained load and chloride ion erosion,the loss of bond strength of specimens is greater than that under the action of single factor.
作者
商怀帅
任国盛
侯东帅
宋华
SHANG Huaishuai;REN Guosheng;HOU Dongshuai;SONG Hua(School of Civil Engineering,Qingdao University of Technology,Qingdao,Shandong 266033,China;Key Laboratory of Green Building in Western China,Xi′an,Shaanxi 710055,China)
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2019年第4期479-483,共5页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(51778310)
西部绿色建筑国家重点实验室2019年度开放基金资助项目(LSKF201909)
北京建筑未来城市设计先进创新中心开放项目(UDC2017011312)
山东省“双一流”建设工程-土木
关键词
钢筋混凝土
梁式试件
持续荷载
氯离子
粘结强度
reinforced concrete
beam specimen
sustained load
chloride ion
bond strength
