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Title |
Evaluation of Buckling Strength of Non-structured Plates by Using the Deformation Energy
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Authors |
지광습(Goangseup Zi) ; 김홍현(Hong-hyun Kim) ; 안진영(Jin-young Ahn) ; 오민한(Min-Han Oh) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.3.102 |
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Keywords |
판의 극한강도 ; 탄소성 구조안정성 ; 변형에너지 ; 비정형 판부재 ; 해양구조물 Ultimate strength of plates ; Elasto-plastic instability ; Deformation energy ; Non-structured plates ; Offshore structures |
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Abstract |
A new index for the buckling strength of non-structured plates is proposed. The external work or the deformation energy caused by the external loads or the boundary displacement controled by a load parameter is calculated along an equilibrium path of the member under consideration. If the second variation of the energy with respect to the parameter loses its positiveness, it defined as the limit of the stability. In contrast to the current method given in codes where the stability limit is evaluated by using only representative internal forces, the evaluation of the stability limit is always consistent even with the change of the distribution of the internal forces on the boundary. If the elasticity is concerned, the result from this proposed approach becomes identical to that from the classical methods.
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