ABSTRACT
The bond performance for mortar-bolt interface significantly affects the reliability of anchoring system. We develop a direct shear method for testing the bond-slip behaviour for mortar-bolt interface, which could observe the local bond-slip behaviour. The realistic ribbed bolt is scanned by three-dimensional laser scanning. The ribs are carved on a steel block surface for representing the ribbed bolt. Mortar specimens are poured on the reconstructed steel blocks with ribs. Direct shear tests are carried out to investigate the bond-slip behaviour for mortar-block interfaces. The Digital Image Correlation method is employed to monitor the strain field during the experiment. Bond-slip curves and bond parameters are easily obtained and the effect of normal stress are discussed. A coupled finite element-particles model is developed to investigate the bond-slip behaviour. The developed method provides an alternative and easy tool to investigate the bond-slip behaviour for mortar-bolt and reinforced concrete structures interface under confining pressures.
