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为了研究异形钢纤维从混凝土基体中拔出时的粘结滑移性能,选择剪切平直型和贝卡尔特双弯钩型两种形状的钢纤维以及不同的钢纤维埋角进行粘结试验.试验结果表明,钢纤维形状、钢纤维埋角是影响拔出荷载位移—曲线以及界面粘结强度的重要因素,贝卡尔特双弯钩钢纤维与混凝土基体界面粘结性能优于剪切平直型钢纤维,界面粘结强度随埋角的增大而减小.
In order to study the bond-slip properties of profiled steel fibers extracted from the concrete matrix, two types of steel fibers with different shear flatness and Bekaert double-hook shape as well as various steel fiber embedding angles The experimental results show that the shape of steel fiber and the embedment angle of steel fiber are the important factors that affect the pull-off displacement-curve and the interfacial bond strength. The interfacial adhesion between Bekaert double-hooked steel fiber and concrete substrate is better than that of shear strength Straight steel fiber, the interface bond strength decreases with the increase of burying angle.