Design of Steel Headed Stud Anchors in Concrete-Filled Steel Composite Deck

Abstract

This paper reports common failure mechanisms of steel headed stud anchors (shear studs) in concrete-filled steel composite decks found in the literature comprised through an extensive database of push-out tests representing multiple shear stud configurations used in composite construction around the world. Monotonically and cyclically loaded push-out test specimens perpendicular or parallel steel deck, or in solid slabs, are included in the evaluation. Comparisons to experimental strengths are made with the steel headed stud anchor strength prediction methods from various international codes and standards along with other mechanics-based design provisions proposed in the literature. Results indicate that shear stud strength predictions for concrete failure modes are often overestimated, meaning the predicted shear stud strength is higher compared to the experimental shear stud strength based on push-out tests, especially for deck perpendicular configurations. To better address concrete-related failures, two alternative design equations are presented within the context of the AISC Specification framework and are validated through comparisons with both push-out tests and composite beam tests documented in the literature.