Abstract: The grouting induced defects are frequently encountered in prefabricated building projects. This paper presents the finite element analysis results on the grouting sleeve with a diameter of 40 mm for connecting the reinforcement bars. The finite element analysis software ABAQUS was used to establish the numerical grouting sleeve model with internal grouting defects. In the contact properties between the reinforcement and the grouting material, the bond slip parameters were modified to conduct unidirectional tensile simulation analysis. The analytical results show that the reduction coefficient of bond strength between the reinforcement and the grouting material is 0.84 with grouting defects inside the sleeve. The failure mode resulted from the numerical analysis is consistent with the test results. The ultimate bearing capacity is accurate, and the load-displacement curve demonstrates a good agreement with the test results. The stress concentration area of the grouting material model is basically the same as the failure area of the grouting material in the test. The stress distribution pattern is reasonable, which would provide a reference for similar engineering practice.

Key words: Grouting Sleeve, Bond Strength, Grouting Defects, Finite Element Analysis