Evaluation of bond strength of steel reinforcing bars in plain and fiber-reinforced concrete

摘要

This paper presents the results of an analytical study undertaken to evaluate the bond strength of reinforcing bars embedded in plain and fiber-reinforced concrete(FRC). The analysis was conducted using a numerical solution scheme of the bond problem in which an experimentally derived local bond stress-slip response of rein- forcing bars, applicable for pullout and splitting-type bond failure, was incorporated. The analytical model accurately reproduced experimental results of bond strength for reinforcing bars embedded in plain unconfined concrete with different ratios of concrete cover-to-bar diameter c/d_b, and having development/splice lengths of up to 60 d_b.