Title: Reliability of Tensile Loaded Cast-in-Place Headed-Stud Anchors for Concrete

Author(s): Eric P. Steinberg

Publication: Structural Journal

Volume: 96

Issue: 3

Appears on pages(s): 430-436

Keywords: anchors (fasteners); concrete; connections; tension

DOI: 10.14359/678

Date: 5/1/1999

Abstract:
Two analytical procedures are currently at the forefront for determining the capacity of headed-stud anchors in concrete. The approach given in ACI 349-90 and in the fourth edition of the PCI Design Handbook considers a cone failure surface, and the other approach, known as the concrete capacity design (CCD) approach, assumes a pyramid-shaped failure surface. To evaluate the reliability of cast-in-place headed-stud anchors, analyses were performed considering the variability of the parameters composing the capacity of the connections and the loading on the connections. The effect of the design approach used on the reliability of the system was also considered. The results revealed that the ACI approach should be used to evaluate the capacity of the connections composed of anchors in which the failure planes do not overlap, according to the ACI criteria, and have embedment depths less than 152 mm. For connections in which the anchor failure planes overlap, according to ACI criteria, and are embedded less than 152 mm, the CCD approach should be used to determine the capacity.