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为有效监测钢筋混凝土内部钢筋的锈蚀以及研究其黏结滑移性能,设计了电化学锈蚀试验对钢筋混凝土试件进行模拟锈蚀及其试验研究。首先,设计制作了15个钢筋混凝土试件,在埋入每个试件中的钢筋表面相同位置粘贴有压电智能传感器;然后,对试件进行电化学快速锈蚀,并在试件锈蚀过程中对其进行压电测试,来追踪锈蚀对波传播的影响;最后,对15个试件进行拉拔试验,来分析钢筋锈蚀引起的粘结滑移退化规律。结果表明:钢筋锈蚀严重影响了应力波的传播衰减规律及其极限黏结强度。
In order to effectively monitor the corrosion of steel bars inside the reinforced concrete and study its bond-slip properties, electrochemical corrosion test was designed to simulate the corrosion of reinforced concrete specimens and its experimental study. First of all, 15 reinforced concrete specimens are designed and fabricated, and the piezoelectric smart sensors are attached to the same surface of the steel bar embedded in each specimen. Then, the specimen is electrochemically rapidly corroded, and during corrosion of the specimen Piezoelectric test was carried out to track the influence of corrosion on wave propagation. Finally, the pullout test of 15 specimens was carried out to analyze the degradation of bond slip caused by steel corrosion. The results show that the corrosion and corrosion of steel bars seriously affect the propagation and attenuation of stress waves and the ultimate bond strength.