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Title |
Analytical Study on the Structural Performance of Permanent Steel Formwork Columns during the Construction Stage
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Authors |
이승의(Seung Ui Lee) ; 허인욱(Inwook Heo) ; 주예진(Ye Jin Ju) ; 김성배(Sung Bae Kim) ; 김도범(Do Bum Kim) ; 김강수(Kang Su Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2026.30.2.41 |
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Keywords |
강재 영구거푸집; 기둥; 측압; 유한요소해석; 수치 최적화 Steel permanent formwork; Column; Lateral pressure; Finite element analysis; Numerical optimization |
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Abstract |
This study investigated the structural behavior of steel permanent formwork columns subjected to construction loads and conducted an analytical study to predict maximum out-of-plane deformation. To achieve this, parametric analyses were performed, each setting three levels for five key variables: rib spacing, column band spacing, plate thickness, sectional size, and maximum lateral pressure. The results of finite element analysis (FEA) was then collected to build an extensive behavioral database. Based on the analysis results, the structural contributions of each component were also quantitatively analyzed. These were integrated based on the principle of superposition and a formula for estimating maximum out-of-plane deformation based on Euler-Bernoulli beam theory was proposed. To improve the prediction accuracy of the formula, a numerical optimization technique was applied to derive a reasonable correction factor. The validation results showed that the proposed formula closely matched the analytical values, particularly in the low-deformation section. Since this section is a serviceability review area directly related to the quality of the concrete finish, the maximum out-of-plane deformation formula proposed in this study is considered a useful model that combines structural reliability with practical prediction accuracy.
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