Abstract
Taking a 10,000TEU container ship as the study object, a series of simplified global hull girder models with large deck openings are modeled and analyzed to investigate their torsional failure behaviors, including collapse modes and ultimate torsional strength. The objective of this research is to answer which mechanism the hull girder with large deck openings under torsion will collapse in and to figure out the decisive factor that is dominating the transformation between the warping failure and the shear failure mechanism. In addition, the ultimate torsional strength reduction curves of the hull girder with large deck openings are obtained to reveal the relationship of the ultimate torsional strength between the global hull girder and the single segment hull girder. Also, it is experimentally validated that the numerical models performed with nonlinear large deflection elastoplastic finite element analysis can well predict the torsional collapse behaviors and ultimate torsional strength of the test model.
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