Abstract
The bond behaviour of steel bars is greatly influenced by the lateral stresses in surrounding concrete and the loading rate. However, information on the dynamic bond behavior of steel bars in concrete still remains limited. In this paper, a total of 180 pull-out specimens with different strengths of concrete and bar diameters are tested to investigate the effect of the loading rate on the bond behaviour of deformed steel bars in concrete subjected to lateral pressure. Based on the experimental results, the effects of various factors on the ultimate bond strength, the residual bond strength, and the slip at the peak bond stress are evaluated in a quantitative manner. Finally, a bond stress-slip relationship of deformed steel bars considering the loading rate, lateral pressure, the strength of concrete, and the bar diameter is proposed and verified with experimental results.
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