静载和疲劳荷载作用下环氧涂层钢筋混凝土梁的耐久性能  

Durability Behavior of Reinforced Concrete Beam with Epoxy Coating under Static Load and Fatigue Load

作　　者：高路[1] 陆晓彤[1] 高扬[1] 王小惠[1] 王菁[1] 

机构地区：[1]上海交通大学土木工程系,200240

出　　处：《混凝土与水泥制品》2016年第4期78-84,共7页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51178266)

摘　　要：对三组钢筋混凝土梁在外荷载和服役环境下的耐久性能进行了试验室模拟研究。运用电化学方法对试件中不同涂层钢筋和无涂层钢筋的阻抗进行了测试和等效电路模拟,结合不同试件的裂缝分布,对模拟结果进行了分析。结果表明,环氧涂层能提高钢筋的耐腐蚀性;加载形式不同会对试件钢筋锈蚀产生不同影响;随盐水腐蚀时间的增加,试件中不同厚度涂层钢筋的抗锈蚀能力也有不同程度的退化。Laboratory simulation research on the durability behaviour of the three groups of reinforced concrete（RC）beams external load and environment attacks was studied, test and equivalent circuits modeling of impedance for specimen containing different epoxy-coated reinforcing bar and uncoated reinforcing bars by using electrochemical method are carried out, that simulation results are analyzed by combining with cracks distribution of different specimens. The results show that, epoxy coating can provide effective anti-corrosion protection for the reinforcing bars; the corrosion of the reinforcing bars in RC test specimens is influenced by external load. Deterioration of the anti-corrosion protection for reinforcing bars with different coating thicknesses in test specimens is shown with the increase of the simulated seawater solution attack.

关 键 词：环氧涂层 耐久性 静载 疲劳荷载 环境腐蚀 

分 类 号：TU511.32[建筑科学—建筑技术科学]