Title: Tensile-Headed Anchors with Large Diameter and Deep Embedment in Concrete

Author(s): Nam Ho Lee, Kang Sik Kim, Chang Joon Bang, and Kwang Ryeon Park

Publication: Structural Journal

Volume: 104

Issue: 4

Appears on pages(s): 479-486

Keywords: anchor; anchor bolt; cast-in-place; embedment; tension test

DOI: 10.14359/18778

Date: 7/1/2007

Abstract:
This paper presents test results for large cast-in-place anchor bolts in concrete. The tests were performed to evaluate the tensile performance of large anchors, that is, anchors with a diameter greater than 2 in. (50 mm) or an embedment depth greater than 25 in. (635 mm), which are not addressed by ACI 318, Appendix D, and ACI 349, Appendix B. 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 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 tensile anchor bolts under tension load.