Tensile Headed Anchors with Large Diameter and Deep Embedment in Concrete

Current anchorage designs for nuclear power plants in
Korea use large anchor bolts with diameters exceeding 2 in.
(50 mm), embedment depths exceeding 25 in. (635 mm), a
specified yield strength of 140 ksi (980 MPa), and a specified
ultimate strength of 155 ksi (1085 MPa). Whereas the tensile
behavior of smaller anchors has been studied extensively,
large anchors have not been adequately addressed. In the
research described herein, large anchors were tested in
tension to develop design criteria for anchors that are not
addressed by ACI 318-05, Appendix D,
1
or ACI 349-01,
Appendix B,
2 and to evaluate the applicability of
capacity-prediction methods developed for smaller anchors.
To evaluate the tensile behavior of anchors with large diameters
and embedment depths, various anchors, with diameters from
2.75 to 4.25 in. (69.9 to 108 mm) and embedment depths from
25 to 45 in. (635 to 1143 mm) were tested.
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