Shear Performance and Mechanism Analysis of Sleeved Stud Connectors

Abstract:

To investigate the shear performance of sleeved stud connectors， 8 stud push-out specimens were designed， and static loading tests were conducted to evaluate the mechanical performance. The shear performance differences between the novel sleeved studs and conventional welded studs were compared. Referring to the experimental results， an Abaqus nonlinear finite element model was developed to study the shear mechanism of sleeved stud connectors. The experimental results indicated that the ultimate shear bearing capacity and shear stiffness of the sleeved stud connectors are higher than those of ordinary welded studs， and the maximum slip is relatively small. Compared to conventional welded studs， the ultimate bearing capacity of sleeved studs increases by 4 % to 8 %， and the shear stiffness increases by 25 % to 35 %. Finite element analysis shows that the shear failure process of sleeved stud connector is similar to novel sleeved stud connector， but the failure range and stud stress of sleeved stud connector is smaller than that of novel sleeved stud connector. The concrete failure of the sleeved stud connector occurs inside the sleeve， while the concrete outside the sleeve is not damaged. Experimental and numerical analysis have shown that the mechanical properties of the sleeved stud connector are better than those of novel sleeved stud connector. It is feasible to design and calculate sleeved stud connector according to the method of novel sleeved stud connector.