Title: Experimental Testing of Tension-Loaded Deformed Anchors in Concrete
Author(s): Rachel Chicchi, Amit H. Varma, Jungil Seo, Thomas Bradt, and Ethan McCarty
Publication: Structural Journal
Appears on pages(s): 133-146
Keywords: breakout failure; deformed reinforcing bar anchors; deformed wire anchors; group anchor assemblies; tension-loaded
Embed plates anchored with welded deformed reinforcing bars or heavy-gauge deformed wire are commonly used for attachments in nuclear facilities. These connections may experience significant tension and/or shear. The required embedment of the welded bars is typically determined based on development length concepts, with the assumption that the nominal tensile capacity of the connection
can be taken as the tension yield strength of the bars. This paper presents results of large-scale experimental investigations conducted to evaluate the tensile capacity of such embed plates. Single anchor pullout test results are also presented to categorize bond behavior for deformed reinforcing bar anchors (DRAs) and deformed wire anchors (DWAs). Preliminary results indicate that adoption of the design paradigm given in the Code for the concrete-governed strength of bonded anchors can provide a reasonable approximation for DRAs but requires additional calibration and study for application to DWAs owing to their diminished bond capacity.