Jebara, KhalilSharma, AkanshuOžbolt, Joško2023-10-232023-10-2320232673-41091870376447http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-136836http://elib.uni-stuttgart.de/handle/11682/13683http://dx.doi.org/10.18419/opus-13664Current formulas to assess the shear capacity of headed steel stud anchors and post-installed (PI) anchors in case of pryout failure (sometimes known as pull-rear failure) have been derived either based on the indirect-tension resistance model or are fully empirical based on push-out test results. In both cases, the predicted pryout capacity is clearly conservative and underestimates the true pryout capacity of anchorages, especially for stiff anchors with low embedment-to-diameter ratios (hef/d < 4.5). This paper proposes an empirical and a semi-empirical formula to predict the concrete pryout capacity of headed steel studs and PI anchors. They were derived based on an improved indirect-tension model which accounts for the stud diameter and the stud spacing in a group of anchors. Furthermore, a database of 214 monotonic shear tests from the literature, including own tests (push-off and horizontally shear tests), is reevaluated and compared to the provisions of EN1992-4. The scope of this assessment proposal includes single and group of headed steel studs and PI anchors attached to a stiff steel plate as well as shear connectors in composite structures without metal deck embedded in normal-weight concrete.eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/624article2023-08-08