Discussion of 'Experimental Study on Bond Behavior of Deformed Bars Embedded in Concrete Subjected to Biaxial Lateral Tensile Compressive Stresses' by Xue Zhang, Zhimin Wu, Jianjun Zheng, Yu Hu, and Qingbin Li

摘要

On the basis of pullout tests conducted on cubic specimens, the discussed paper presents an interesting experimental study on the bond behavior of deformed reinforcing bars. In particular, the effects of biaxial lateral tensile-compressive stresses on the failure mode, bond strength (ultimate and residual), and slip at the peak bond stress are analyzed. A total of 252 were tested, which covered 84 different combinations of the following parameters: strength of concrete (f_(cu) for compressive and f_t for tensile), bar diameter (d), cover depth (c), and directions of lateral stresses, i.e., Case A: lateral compressive stresses (p_c) and perpendicular and lateral tensile stresses (p_t) parallel to the transverse ribs of deformed reinforcing bars, respectively; Case B: vice versa. The authors should be congratulated for producing a detailed paper that reports valuable findings of interest. This is acknowledged by the discusser who would like to provide some comments for their consideration and response.