Title: Shear Behavior of Headed Anchors with Large Diameters and Deep Embedments

Author(s): Nam Ho Lee, Kwang Ryeon Park, and Yong Pyo Suh

Publication: Structural Journal

Volume: 107

Issue: 2

Appears on pages(s): 146-156

Keywords: anchor; anchor bolt; cast-in-place; embedments; shear tests.

DOI: 10.14359/51663530

Date: 3/1/2010

Abstract:
This paper presents shear test results for large cast-in-place anchor bolts in concrete. The tests were performed to evaluate the shear performance of large anchors, that is, anchors with a diameter greater than 2 in. (50.8 mm) or an embedment depth greater than 25 in. (635.0 mm), which are not addressed by ACI 318-08, Appendix D and ACI 349-06, Appendix D. The tests were also intended to investigate the safety of such anchors for use in nuclear power plants, and the effects of regular (conventional) and special reinforcement on the shear strength of such anchors. The test results are used to assess the applicability of existing design formulas valid for smaller anchors to large anchors. Suggestions are made for incorporating the effects of deep embedment or large diameter in existing design provisions for cast-in-place anchor bolts under shear load.