人民珠江2024，Vol.45Issue(6)：92-99,8.DOI:10.3969/j.issn.1001-9235.2024.06.011
变幅反复荷载作用下变形钢筋与混凝土间的黏结退化
Bond Degradation between Deformed Reinforcement and Concrete under Variable Repeated Loads
摘要
Abstract
The bond-slip constitutive model between reinforcement and concrete under repeated loads is an important basis for the assessment of the overall performance of reinforced concrete structures and reinforcement repair after earthquakes.Since the bond stress is mainly composed of the mechanical occlusion force between deformed reinforcement and concrete,the lateral confinement state in the bond region will affect its bond performance.On this basis,this paper investigated the effect of variable repeated loads under lateral pressure on the bond performance between reinforcement and concrete,quantitatively analyzed the degradation law of bond parameters with variable repeated loads,and studied the bond damage mechanism between reinforcement and concrete by using digital image technology.It is shown that under the condition of sufficiently restrained concrete protective layer,the bond degradation between reinforcement and concrete is mainly related to the displacement controlled by repeated loads,while the effect of lateral pressure on it is negligible.关键词
侧向压力/反复荷载/黏结退化/数字图像技术/混凝土Key words
lateral pressure/repeated loads/bond degradation/digital image technology/concret分类
建筑与水利引用本文复制引用
程宏远,马金尧,郑丹,程文百合,李鑫鑫..变幅反复荷载作用下变形钢筋与混凝土间的黏结退化[J].人民珠江,2024,45(6):92-99,8.基金项目
国家自然科学基金(51809025) （51809025）
