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Title |
Evaluation of Pull-out Performance of Torsion Control Expansion Anchor According to Drill Bit Diameter
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Authors |
채경훈(Kyoung-Hun Chae) ; 박태원(Tae-Won Park) ; 허무원(Moo-Won Hur) ; 안영승(Yeong-Seung An) ; 한주연(Ju-Yeon Han) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.1.64 |
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Keywords |
후설치 앵커; 신뢰성 시험; 표준편차; 변동계수; 인발성능 Post-installed anchor; Reliability test; Standard deviation; Coefficient of variation; Pull-out test |
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Abstract |
In this study, reliability tests of torsion control expansion anchors according to drill bit diameters were performed. The standard deviationand coefficient of variation of the anchor were reviewed through the tests for each variable, and the results were compared and evaluated with the standardtest results. As a result of the reliability test of the M12 and M16 anchors with 1.04 times the drill bit diameter, they were within 20% of the ultimatetensile load permissible standard coefficient of variation. It was found that the pulling-out performance of the anchor installed in the large hole wassufficiently secured. However, it was found to be about 253% and 210% of the design strength, indicating that the pulling performance of the anchorinstalled in 1.04 times the drill bit diameter was sufficiently secured. As a result of the reliability test of the M12 and M16 anchors with 1.02 timesthe drill bit diameter, the value of the coefficient of variation of the ultimate tensile load limit was within 20%, which satisfies the test standard. Itwas shown to be about 136% and 168% of the design strength, indicating that the pulling-out performance of the anchor installed in 1.02 times thedrill bit diameter is sufficiently secured.
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