Ships and Offshore Structures ( IF 2.1 ) Pub Date : 2020-11-02 , DOI: 10.1080/17445302.2020.1834753 Weijun Xu 1, 2 , Xueqian Zhou 1, 2 , Chenfeng Li 1, 2 , Huilong Ren 1, 2
ABSTRACT
When the external load exceeds the ultimate strength of hull girder, the load-carrying capacity is not completely lost due to the supporting and constraint between structure members. It is also determined by the post-ultimate strength behaviour, and the collapse severity needs to be studied to evaluate the consequence of collapse. An analytic approach is presented in this paper to analyse the factors influencing the collapse severity of hull girder under extreme wave load. The equations of motion of hull girder are derived for an external moment unloading in different ranges of the generalised moment-curvature relationship so as to predict the corresponding final severity of collapse. The severity is also analysed from the energy point of view to investigate the influence of the capacity drop on the severity. The complete post-ultimate strength behaviour of hull girder revealed in this study provides a reference for structure safety design of ship hull girders.
中文翻译:
极限波浪荷载作用下船体梁极限后强度行为及倒塌严重程度的解析法
摘要
当外载超过船体梁的极限强度时,由于结构构件之间的支撑和约束,承载能力并未完全丧失。它也由后极限强度行为决定,需要研究倒塌严重程度以评估倒塌的后果。本文提出了一种分析方法来分析影响极端波浪载荷下船体梁倒塌严重程度的因素。推导了在广义弯矩-曲率关系的不同范围内卸除外弯时船体梁的运动方程,以预测相应的最终倒塌严重程度。还从能量的角度分析严重性,考察容量下降对严重性的影响。