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为了研究混凝土植筋构件在疲劳荷载作用下的受力性能,本文对3根植筋深度分别为15d、20d、25d(d为植筋的直径)混凝土植筋梁进行了疲劳荷载作用下的受弯试验研究。研究表明:梁的裂缝多出现在疲劳前的静载试验阶段,疲劳损伤主要发生在前50万次的疲劳加载过程中;疲劳荷载作用下产生的累积损伤使植筋端头部位成为结构破坏的另一易发位置;增大植筋深度能够减轻植筋梁的疲劳损伤,降低梁的疲劳变形,并能够有效改善梁的刚度退化性能。
In order to study the mechanical behavior of concrete anchorage member under fatigue load, three bent concrete beams with different implanting depths of 15 d, 20 d, 25 d Experimental Research. The results show that the cracks in the beam mostly occur in the static load test before fatigue, and the fatigue damage mainly occurs in the first half a million times of fatigue loading. The cumulative damage caused by the fatigue load causes the structural damage Of the other easy-to-send position; increasing planting depth can reduce the fatigue damage of anchorage beam, reduce the fatigue deformation of the beam, and can effectively improve the rigidity of the beam degradation.