ABSTRACT
This paper presents the estimation of the load capacity of steel bonded anchors in concrete and multi-layer elements, in various arrangements and configurations, starting from single anchors perpendicular to the surface of the concrete element and ending with diagonal anchors bonded at 30, 45 and 60 degrees. The estimates of load capacity used analytical models regarding, among others: individual anchors for pulling out taking into account the shear force of the texture layer and the anchor fixing factor (with or without lever arm); single concrete anchors for pulling out in full concrete elements and three-layer concrete elements as well as single diagonal anchors (without taking into account shear force). The first stage of experimental research included steel anchors bonded at an angle of 90 degrees in 22 three-layer samples and 10 samples with concreted anchors (7 solid samples and 3 three-layer samples) at different anchorage depths.at various anchoring depths. In the second stage, steel anchors concreted in concrete samples were tested. The third stage consisted of double-bolt anchor systems bonded at 30 and 45 degrees angles. The last, fourth stage was experimental study of three-bolt anchors. Experimental research was used to verify the theoretical load capacity of this type of connections in the external walls of large slab panel buildings. The results of experimental studies were compared with 56 numerical calculations made in ANSYS software and theoretical estimates according to the proposed analytical models.
