| Abstract: | Shear Loaded Quadruple Fastenings Close to Edge – Proposal for New Design Concept Fastenings in concrete with anchor groups placed close to a free edge are often met in practice. At the connection of anchors with a steel base plate, installation tolerances are present and so the anchors are randomly placed in the clearance holes of the plate. Consequently, by shear loading of an anchorage, the individual anchors are not activated simultaneously and the group's shear capacity is strongly affected. At shear loaded quadruple anchorages close to an edge the most unfavourable configuration is reached if the first row of anchors is loaded first. Based on that, the current design of shear loaded anchor groups close to an edge according to ETAG 001 considers only the anchors near the edge for ultimate limit state (ULS). Experiments with common geometries and unfavourable anchor configurations show in contrary essential higher breaking loads. Hence, for the ULS a new design concept is developed. It extends the present system of the projected concrete surfaces, and allows for a user‐friendly calculation to define the design load continuously out of the geometry. In the end this new design concept is verified by experimental results. |
