湖南大学学报（自然科学版）2017，Vol.44Issue(5)：63-72,10.DOI:10.16339/j.cnki.hdxbzkb.2017.05.008
冻融循环作用下表层嵌贴CFRP-混凝土界面黏结性能试验研究
Experimental Study of Bond between Near-surface Mounted CFRP Strips and Concrete under Freeze-thawing Cycles
摘要
Abstract
The durability of the interface between NSM FRP and concrete under freeze-thawing cycles was examined.The pull-out tests were conducted to investigate the influence of freeze-thawing cycles on the bond performance between NSM FRP and concrete with normal strength, high strength, or additional frost resistance.The mechanism of the bond degradation between NSM FRP and concrete under the freeze-thawing cycles was also discussed.Moreover, the influences of the distance between concrete edge and groove (edge distance) and the thickness of epoxy adhesive on the bond durability of the NSM FRP were studied.The test results show that freeze-thawing cycling resulted in the strength deterioration of ordinary concrete, while the high strength concrete and the concrete with frost resistance showed no significant deterioration under freeze-thawing cycles.Freeze-thawing cycling also caused the transformation of failure mode and the relatively significant decrease in bond capacity for specimens using ordinary concrete.Nevertheless, it had no substantial impact on the bond performance of specimens made by concrete with high strength or frost resistance.This result indicates that the bond deterioration of NSM FRP under freeze-thawing cycles was caused by low strength of concrete.Moreover, the decrease of edge distance resulted in cone-shape cracks at the loading end.When the thickness of epoxy adhesive was reduced, the bond strength degradation induced by freeze-thawing cycles was more significant compared with that of specimens with thicker epoxy adhesive.关键词
表层嵌贴/CFRP/黏结性能/冻融循环/混凝土Key words
near-surface mounted/CFRP/bond performance/freeze-thawing cycles/concrete分类
建筑与水利引用本文复制引用
彭晖,刘洋,付俊俊,苏鹏,刘扬..冻融循环作用下表层嵌贴CFRP-混凝土界面黏结性能试验研究[J].湖南大学学报（自然科学版）,2017,44(5):63-72,10.基金项目
国家自然科学基金资助项目(51578078), National Natural Science Foundation of China(51578078) （51578078）
国家重点基础研究发展计划(973计划)项目(2015CB057701),Project of National Key Basic Research Program of China(973 Program)(2015CB057701) （973计划）
湖南省教育厅科学研究重点项目(14A005),Key Project of Science Research of Hunan Educational Committee(14A005) （14A005）
长沙市科技计划项目(K1508020-31),Science Plan Project of Changsha(K1508020-31) （K1508020-31）
