The Numerical Analysis of Influence of the Shape of the Anchor Head on the Headed Stud's Tensile Capacity

Abstract

This paper deals with the numerical analysis of the headed stud ́s tensile behavior in dependence on the shape and size of the head. Forty-eight 2D axi-symmetric numerical models were carried out. Three different embedment depths (50, 150 and 450 mm), each with four different angles of the top head surface (0, 20, 40 and 60 degrees) and four different head sizes (dh/hef = 0,15; 0,2; 0,3 or 0,4). The concrete behavior was simulated by the Nonlinear Cementitious2 fracture-plastic material model. The results of the analysis showed that the shape (angle) has only the negligible effect on the tensile capacity especially for the small heads. The more significant increase of the capacity was observed within the large head size where the increase of the bearing area due to the different angle is more significant.