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针对电化学除氯后钢筋与混凝土之间的粘结退化可能引起结构构件抗震性能劣化的状况,通过低周反复荷载试验,对混凝土桥墩电化学除氯处理后的抗震性能进行试验研究,分析试验构件的破坏特征、滞回曲线、耗能、骨架曲线和刚度退化的变化情况。研究结果表明:钢筋混凝土桥墩经电化学处理后,在反复荷载作用下,其破坏形式可能由弯曲破坏转化为弯曲-粘结破坏,滞回曲线由丰满变得干瘪,耗能能力降低,峰值后试件的承载力下降,刚度降低;在利用电化学除氯的优势延长钢筋混凝土结构使用寿命的同时,需要最大限度地降低电化学除氯带来的不利作用。
Aiming at the degradation of bond between reinforced concrete and concrete after electrochemical dechlorination, the seismic performance of structural members may be deteriorated. Through the test of low cycle repeated loading, the seismic performance of concrete pier after electrochemical dechlorination is tested and analyzed Component failure characteristics, hysteresis curve, energy consumption, skeleton curve and stiffness degradation. The results show that under the action of repeated load, the failure mode of reinforced concrete piers may be transformed from bending failure to bending-adhesion failure by electrochemical treatment. The hysteresis curve becomes dull by plumpness, and the energy dissipation capacity decreases. After the peak value The bearing capacity of the specimen is decreased and the rigidity is reduced. While using the advantages of electrochemical dechlorination to prolong the service life of the reinforced concrete structure, it is necessary to minimize the adverse effect caused by electrochemical dechlorination.