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Title |
Performance Evaluation of Post-installed Anchor according to Sleeve Length and Header Length
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Authors |
허무원(Moo-Won Hur) ; 채경훈(Kyoung-Hun Chae) ; 안영승(Yeong-Seung An) ; 박태원(Tae-Won Park) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.2.8 |
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Keywords |
후설치 앵커; 유한요소해석; 슬리브 길이; 헤더 길이; 묻힘깊이 Post-installed anchor; FEM analysis; Sleeve length; Header length; Embedded depth |
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Abstract |
This study presents post-installed anchors whose heads and extension sleeves are improved. The optimal lengths of the extension sleeves and headers were analytically determined by simulations. As a result of analysis using Finite element method (FEM), 9.0mm and 3.0mm were determined as the optimal lengths of sleeves and headers respectively. In pull-out tests using the improved post-installed anchors, all specimens satisfied the coefficient of variation of 15%. Comparing the pull-out strengths of existing anchors and the improved anchors, it was increased by 1.25 times for anchors embedded with a depth of 50mm, and 1.54 times for 70mm. In the cases of high-strength concrete, the strengths were increased by 1.28 and 1.55 times for 50mm and 70mm respectively. Moreover, as a result of shear tests, the improved anchors perform the greater strength of 1.38 times than the existing anchors.
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