钢筋锈蚀对混凝土构件性能的影响

The Influence of Reinforcement Corrosion on Concrete Component Performance

采用外加电流对混凝土中的钢筋进行快速锈蚀实验,通过控制时间和通电电流,得到不同锈蚀程度的构件,并研究锈蚀后钢筋屈服强以及钢筋与混凝土间黏结性能的变化规律.实验结果表明:随着钢筋锈蚀率的增大,钢筋的屈服强度不断减小,钢筋与混凝土间的黏结强度也不断减小,从而使得混凝土构件的性能退化.

By using the impressed current to perform rapid corrosion experiments on reinforcement in con- crete and controlling time and energizing current, different corrosion degrees of components were obtained, and the regularity of the yield strength of reinforcement rusted and corroded and bonding performance be- tween reinforcement and concrete was discussed. The experimental results show that with the increase of rebar corrosion rate,reinforcement yield strength decreases,and the bond strength between reinforcement and concrete also decreases, which leads to the performance degradation of concrete members.