Tensile performance of inclined adhesive anchors in steel fiber-reinforced concrete

In almost all studies on post-installed anchors in concrete, the anchor direction is perpendicular to the concrete surface. However, the anchor direction may not be perpendicular to the concrete surface due to application errors or requirements. In the study, the effect of inclination angle is examined experimentally for non-perpendicular anchorage to steel fiber-reinforced concrete. Anchor inclination angle (0 degrees, 15 degrees, and 30 degrees), fiber volume fraction (0%, 1.5%, and 3%), and embedment depth (40, 60, and 80 mm) are considered variables. Trial points are decided using the "Box-Behnken" experimental design approach. An 8 mm diameter deformed steel bar and two-component epoxy acrylate-based chemical adhesive are used for anchorage. Load-displacement curves, ultimate loads, and failure modes are determined through tensile tests. It is concluded that as the fiber fraction increases, failure modes modify and the negative effect of the inclination angle decreases, particularly in cases of small embedment depth.