Bond behavior is the basis of combined action of steel bar and high ductile concrete (HDC), which has an important effect on the mechanical performance of reinforced HDC structures. In this paper, nine groups of pullout specimens were tested to investigate the bond behavior and degradation mechanism of plain round bar embedded in HDC under monotonic and cyclic loading. The design parameters included HDC compressive strength, HDC flexural toughness and anchorage length. Experimental results indicated that only a small free end slip occurred for specimens with plain round bar when the maximum bond stress was reached. Bond strength of polyethylene fiber specimens was 1.67 times that of polyvinyl alcohol fiber specimens. Compared with the monotonic specimens, the cyclic specimens exhibited an obvious degradation in bond strength and residual bond strength, and the degradation degree of former was more serious than that of latter. Besides, it also should be noted that the HDC compressive strength had a great influence on the energy dissipation capacity of cyclic specimens. Based on the test results, a calculating formula of bond strength was built. Then this paper proposed a bond stress-slip relationship model for the plain round bar embedded in HDC under monotonic loading.

中文翻译：

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单调循环荷载下嵌入高延性混凝土的普通圆棒的粘结性能

粘结性能是钢筋与高延性混凝土（HDC）联合作用的基础，对加筋HDC结构的力学性能具有重要影响。本文通过对9组拔出试件进行试验，研究单调循环加载下嵌入HDC的普通圆棒的粘结行为和退化机理。设计参数包括 HDC 抗压强度、HDC 弯曲韧性和锚固长度。实验结果表明，当达到最大粘结应力时，普通圆棒试样仅发生小自由端滑动。聚乙烯纤维试样的粘结强度是聚乙烯醇纤维试样的1.67倍。与单调标本相比，循环试件的粘结强度和残余粘结强度均有明显下降，且前者的退化程度较后者严重。此外，还应注意 HDC 抗压强度对循环试件的耗能能力有很大影响。根据试验结果，建立了粘结强度计算公式。然后本文提出了单调加载下嵌入HDC的普通圆钢的粘结应力-滑移关系模型。