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Title |
Comparison of Computational Fracture Models and Design Equations for Concrete Anchor Pull-Out Prediction
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Authors |
전시우(Siwoo Jeon) ; 모바헤디 나스타란(Nastaran Movahedi) ; 주민관(Minkwan Ju) ; 박경수(Kyoungsoo Park) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.3.401 |
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Keywords |
콘크리트 앵커; 인발 거동; 응집영역모델; 콘크리트손상소성모델; 설계 기준 concrete anchor; pull-out behavior; cohesive zone model; concrete damage plasticity model; design equation |
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Abstract |
This study compared the pull-out behavior of concrete anchors as predicted by the cohesive zone model (CZM), the concrete damage plasticity model (CDPM), and the ACI and KDS design codes. The results demonstrated that the ACI and KDS design equations generally underestimate anchor pull-out strength, while the numerical analyses successfully capture the change in pull-out strength with respect to fracture energy. Additionally, a parametric study was conducted to investigate the effects of element size, tensile strength, dilation angle, and failure angle on the load?displacement response. The CZM provided converged results regardless of element size. Since most CZM parameters are obtained directly from fracture tests, the model is less sensitive to subjective calibration of the load?displacement curve. In contrast, CDPM results vary slightly with mesh density and exhibit high sensitivity to the choice of dilation angle, which cannot be directly obtained through experimental testing. These findings suggest that, while design codes offer a practical baseline for pull-out strength evaluation, the characteristics of the chosen analysis model should be carefully considered, and fracture mechanics?based approaches may be employed when a more detailed assessment of pull-out behavior is required.
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