In this paper, the experimental investigation on degradation law of bond behaviors between copper slag concrete and corroded steel bar after exposure to high temperature was conducted. The bond behaviors such as bond strength, bond stiffness, peak slip displacement and average bond stress-slip curve between copper slag concrete and corroded steel bar after heating were analyzed with the change in heating temperature and corrosion rate of steel bar. Moreover, the distribution of free chloride ion in concrete was measured and the chloride ion diffusion coefficient was also calculated. At last, the bond-slip constitutive model suitable for high temperature damaged concrete and corroded steel bar was proposed. The test results showed that the chloride ion diffusion coefficient of high temperature damaged copper slag concrete increased with the increasing of copper slag replacing ratio and heating temperature. The bond strength between copper slag concrete and corroded steel bar decreased with the increasing of heating temperature and corrosion rate of the steel bar and decreased at an accelerated rate with the increasing of the copper slag replacing ratio, and the peak slip displacement gradually increased as the heating temperature increased. However, the bond stiffness increased first and then decreased with the increasing of heating temperature, and the bond stiffness also increased with the increasing of copper slag replacing ratio. At last, the accuracy of the bond-slip constitutive model established based on the test results was verified.

本文对铜渣混凝土与锈蚀钢筋暴露于高温后的粘结性能退化规律进行了试验研究。分析了加热后铜渣混凝土与锈蚀钢筋之间的结合强度、结合刚度、峰值滑移位移和平均结合应力-滑移曲线等结合行为，并随加热温度和钢筋锈蚀速率的变化而变化。此外，还测量了混凝土中游离氯离子的分布，并计算了氯离子扩散系数。最后提出了适用于高温破坏混凝土和锈蚀钢筋的粘结滑移本构模型。试验结果表明，高温破坏铜渣混凝土的氯离子扩散系数随着铜渣置换率和加热温度的增加而增加。铜渣混凝土与锈蚀钢筋之间的结合强度随着钢筋受热温度和锈蚀速率的升高而降低，随着铜渣置换率的增加而加速降低，峰值滑移位移随着钢筋的腐蚀而逐渐增大。加热温度升高。但结合刚度随着加热温度的升高先增大后减小，结合刚度也随着铜渣置换率的增加而增大。最后验证了基于试验结果建立的粘结滑移本构模型的准确性。