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Date of Publication:2021-01-01

Journal:Chuan Bo Li Xue/Journal of Ship Mechanics

Volume:25

Issue:10

Page Number:1367-1376

ISSN No.:1007-7294

Abstract:Crack damage is inevitable for ship structures and can weaken the ultimate strength of the structures. Therefore, it is of great significance to study the residual ultimate strength of ship structures with crack damage. Existing research mainly focuses on the residual ultimate strength of cracked hulls under vertical bending moment, and there is still a lack of research under combined bending moment. In this paper, the residual ultimate strength of a cracked midship section under combined action of vertical moment and horizontal moment is studied by using nonlinear finite element (FE) analysis. An evaluation formula is proposed to calculate the residual ultimate strength of the cracked midship section under the combined bending moment. Undetermined coefficients in the formula are obtained by fitting FE calculation results of cracked box girders. The results indicate that the proposed method can be used for rapid prediction of the residual ultimate strength of cracked hull structures under combined bending moment. © 2021, Editorial Board of Journal of Ship Mechanics. All right reserved.

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