Title:
Behavior of Channel Anchors in Thin Slabs Under Combined Shear and Tension (pullout) Loads
Author(s):
Francis A. Oluokun and Edwin G. Burdette
Publication:
Structural Journal
Volume:
90
Issue:
4
Appears on pages(s):
407-413
Keywords:
anchors (fasteners); loads (forces); slabs; Structural Research
DOI:
10.14359/3959
Date:
7/1/1993
Abstract:
The use of channel anchors in concrete construction is relatively new. The shear and tensile (pullout) capacities of single-stud anchors can be reasonably predicted using the concrete failure cone method or empirical formulas. Similar shear and pullout capacity prediction relationships have been derived and proposed for channel anchors embedded in thin slabs. The authors have coauthored two publications on the prediction of the tension (pullout) and shear capacity of channel anchors embedded in thin slabs. It is therefore logical to go further and investigate the behavior of channel anchors in thin slabs under the combined pullout and shear loads. This investigation was done experimentally to verify or otherwise invalidate the applicability of the well-known five-thirds power interaction equation developed for stud anchors to channel anchors in thin slab applications. From the results of the tests performed and reported herein, it was found that a blanket application of the five-thirds power interaction relation could not be justified. The applicability of the interaction equation was found to be influenced by such factors as the stiffness of the channel anchor, which, in turn, affects the transfer of shear load to the concrete below the channel, which is responsible for shear resistance, the eccentricity of the point of shear load application from the face of the slab, and type of failure. This paper contains tables of results and figures supporting the findings just stated.