Reliability of tensile loaded cast-in-place headed-stud anchors for concrete

Two analytical procedures are currently at the forefront for determining th e 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 f ailure surface, and the other approach, known as the concrete capacity desi gn (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 a pproach used on the reliability of the system was also considered. The resu lts 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 o verlap, according to the ACI criteria and have embedment depths less than 1 52 mm. For connections in which the anchor failure planes overlap, accordin g to ACI criteria, and are embedded less than 152 mm, the CCD approach shou ld be used to determine the capacity.