摘要
在钢筋与混凝土粘结性能的分析研究中,钢筋与混凝土的粘结本构关系是至关重要的。为了正确揭示钢筋与混凝土的粘结本构关系,本文首先从理论上推导了钢筋应力σs、钢筋与混凝土的粘结应力τ以及钢筋与混凝土的相对滑移s的解析表达式,并根据拔出试验数据,给出了随不同位置变化的钢筋与混凝土粘结应力和相对滑移关系,推导了反应这种变化规律的位置函数。本文还通过不同锈蚀量的光面钢筋和变形钢筋的拔出试验,得到了两种钢筋与混凝土的粘结性能随着不同钢筋锈蚀量的变化规律,根据试验结果的统计分析,给出了两种钢筋锈蚀后与混凝土的粘结强度计算公式。最后,本文给出了随时间和位置变化的钢筋与混凝土的粘结本构关系,可较全面地反映钢筋与混凝土的粘结性能。
Bond slip relationship is very important to the study of the bond behavior of steel bars and concrete. For presenting the accurate bond slip relationship, the equations of stress of steel bars, bond stress, and relative slip of steel bars and concrete were deduced through theoretical analyses at first. On the basis of the pullout test data, the position functions that reflected the bond slip relationship varying with the different positions were proposed. According to the pullout test of two kinds of corroded steel bars, the bond behavior of corroded plain and deformed bars was discussed then. On the basis of the test data, the formulas of bond strength of corroded steel bars and concrete were developed. This paper also gave the relationship of bond stress and slip of corroded bars and concrete varying with time and position, which could reflect the bond behavior of steel bar and concrete comprehensively.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2002年第1期32-37,共6页
Journal of Building Structures
关键词
钢筋混凝土
粘结本构关系
位置函数
拔出试验
锈蚀
reinforced concrete, bond stress slip relationship, position function, pullout test, corrosion
