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| Prediction of Ultimate Bearing Capacity of Typical Stiffened Plates Based on Failure Modes |
| Received:July 14, 2023 Revised:September 01, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.09.009 |
| KeyWord:stiffened panels ultimate bearing capacity failure mode reinforcement flexibility deck flexibility empirical formula |
| Author | Institution |
| ZHANG Zheng |
Green & Smart River-sea-going Ship, Cruise and Yacht Research Center, Wuhan , China |
| GAN Jin |
School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan , China |
| WU Wei-guo |
Green & Smart River-sea-going Ship, Cruise and Yacht Research Center, Wuhan , China |
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| Abstract: |
| The work aims to explore the effect of failure modes on the ultimate bearing capacity of stiffened plates, and to propose a method for predicting the ultimate bearing capacity of stiffened plates. The nonlinear finite element method was used to analyze the model of a typical hull stiffened plate. Considering the two main affecting factors of reinforcement flexibility and deck flexibility, the failure mechanism of the stiffened plate was analyzed. The effect rules of the deck flexibility and reinforcement flexibility on the ultimate bearing capacity of the stiffened plate under different failure modes were clarified. And an empirical formula for ultimate bearing capacity of the stiffened plate in different failure modes were proposed. The result showed that when the flexibility of the deck was constant, with the increase of the reinforcement flexibility, the failure mode of the stiffened plate changed from the local buckling of the plate and the reinforcement to the local buckling of the panel, and finally to the overall beam-column buckling of the stiffened plate. When the panel width was low, the failure mode of the stiffened plate changed from beam-column buckling to panel buckling with the increase of the reinforcement height; and when the panel width was large, the failure mode of the stiffened plates with different reinforcement heights was panel buckling. At the same time, under different failure modes, the load-displacement curves of the stiffened plates also showed different trends. In conclusion, the quantitative relationship between the reinforcement flexibility and the deck flexibility will lead to different failure modes of the stiffened plate. At this time, the effect of the two on the ultimate bearing capacity of the stiffened plate will be different. In the design stage, it is necessary to ensure that the stiffness of the reinforcement matches that of the deck, so as to avoid the phenomenon that the utilization rate of materials is too low. |
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