重庆大学学报Issue(1)：79-87,9.DOI:10.11835/j.issn.1000-582X.2016.01.011
锈蚀钢筋混凝土粘结强度试验
Deterioration of reinforced-concrete bond strength due to corrosion
摘要
Abstract
The environment-induced corrosion of steel bars in concrete results in deterioration of reinforcement-concrete bond properties,and causes the damage of concrete structures.The accelerated corrosion of reinforced concrete specimens and also the pull-out test of the corroded specimens were carried out to study the deterioration of corroded reinforced-concrete bond strength.We used industrial computed tomography (ICT )scanning to exam the cracking of the concrete cover of the specimens caused by corrosion.According to the pullout tests,the ultimate shear capacity and the corresponding displacement of the corroded specimens are degraded with the corrosion extent,and the bond stiffness is depressed.The analysis based on the experimental results shows that the thickness of corrosion products,other than the corrosion ration of steel bars,influences the corroded expansion force and the degradation of bond strength more directly.By introducing the factors of the thickness of corrosion,the ratio of thickness of concrete coat to the steel bar’s diameter,and the tension strength of concrete,a bond strength model of corrosion reinforced-concrete is proposed.The practicability of the suggested model is proved by experimental data.关键词
锈蚀钢筋混凝土/粘结强度/混凝土裂缝/粘结滑移/耐久性Key words
corroded reinforced-concrete/bond strength/concrete cracking/bond-slip relationship/durability分类
建筑与水利引用本文复制引用
陈朝晖,谭东阳,曾宇,林文修..锈蚀钢筋混凝土粘结强度试验[J].重庆大学学报,2016,(1):79-87,9.基金项目
国家自然科学基金（11272362）；中央高校基本科研业务费专项资金（CDJZR200020）。Supported by National Natural Science Foundation of China（11272362）and the Fundamental Research Funds for the Central Universities（CDJZR200020）． （）
