Proposed Equation for Pull-Out Bearing Capacity and Correlation with Torque Capacity of Post-Installed Screw Anchor

Abstract

The purposes of this study are to investigate the design equations for the bond strength and the pull-out bearing capacity of a post-installed screw anchor with an epoxy resin adhesion and correlation between the pull-out bearing capacity and the torque capacity. In the previous study, the pull-out and torque tests have been carried out for the post-installed screw anchor embedded into concrete slabs. In this study, the same tests were carried out with two levels of compressive strength of concrete. From the results of the pull-out tests, each equation for the bond strength and the pull-out bearing capacity failed in the cone failure and combined failure modes was proposed based on the empirical equation. Furthermore, the correlation between the pull-out bearing capacity and the torque capacity was evaluated. Then, they had a linear trend as well as the previous study.