| 압축하중을 받는 유공보강판 구조의 최종강도 설계식 개발 |
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박주신, 고재용, 이경환 |
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| Development of Designed Fomulae for Predicting Ultimate Strength of the Perforated Stiffened Plate subjected to Axial Compressive Loading |
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Joo-Shin Park, Jae-Yong Ko, Kyung-Hwan Lee |
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| Abstract |
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Ship structures are thin-walled structures and lots of cutouts, for example， at inner bottom structure, girder, upper deck hatch, floor and dia-frame etc. In the case where a plate has a cutout it experiences reduced buckling and ultimate strength and at the same time the in-plane stress under compressive load produced by hull girder bending will be redistributed In the present paper, we investigated several kinds of perforated stiffened model from actual ship structure and series of elasto-plastic large deflection analyses were performed to investigate into the influence of perforation on the buckling and ultimate strength of the
perforated stiffened plate varying the cutout ratio, web height, thickness and type of cross-section by commercial FEA program(ANSYS) Closed-form formulas for predicting the ultimate strength of the perforated stiffened plate are empirically derived by curve fitting based on the Finite Element Analysis results. These formulas are used to evaluate the ultimate strength, which showed good correlations with FEM results. These results will be useful for evaluating the ultimate strength of the perforated stiffened plate in the preliminary design. |
| Key Words:
Perforated Plate;Perforated Stiffened Plate;Ultimate Strength;Cutout ratio;Buckling;
In-plane Stress |
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