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Dynamic shear strength of unreinforced and Hairpin-reinforced cast-in-place anchors using shaking table tests
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 Title & Authors
Dynamic shear strength of unreinforced and Hairpin-reinforced cast-in-place anchors using shaking table tests
Kim, Dong Hyun; Park, Yong Myung; Kang, Choong Hyun; Lee, Jong Han;
 Abstract
Since the publication of ACI 318-02, the concrete capacity design (CCD) method has been used to determine the resistance of unreinforced concrete anchors. The regulation of steel-reinforced anchors was proposed in ACI 318-08. Until ACI 318-08, the shear resistance of concrete breakout for an unreinforced anchor during an earthquake was reduced to 75% of the static shear strength, but this reduction has been eliminated since ACI 318-11. In addition, the resistance of a hairpin-reinforced anchor was calculated using only the strength of the steel, and a regulation on the dynamic strength was not given for reinforced anchors. In this study, shaking table tests were performed to evaluate the dynamic shear strength of unreinforced and hairpin-reinforced cast-in-place (CIP) anchors during earthquakes. The anchors used in this study were 30 mm in diameter, with edge distances of 150 mm and embedment depths of 240 mm. The diameter of the hairpin steel was 10 mm. Shaking table tests were carried out on two specimens using the artificial earthquake, based on the United States Nuclear Regulatory Commission (US NRC)`s Regulatory Guide 1.60, and the Northridge earthquake. The experimental results were compared to the current ACI 318 and ETAG 001 design codes.
 Keywords
cast-in-place anchor;unreinforced anchor;hairpin-reinforced anchor;dynamic shear strength;shaking table tests;
 Language
English
 Cited by
 References
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