计及船体剪力作用和弹性固支的槽型舱壁极限强度分析

Ultimate Strength Analysis of Corrugated Bulkheads Considering Influences of Shear Force and the Elastically-fixed Rigidity of Adjoining Structures

本文在Paik等人提出的预测槽型舱壁单槽梁模型极限弯矩的基础上 ,根据弹塑性理论导出了考虑到轴向载荷影响的计算公式。然后在同时考虑甲板及双层底对槽型舱壁弹性固支条件下 ,提出了单槽梁在轴向压力与侧向分布载荷联合作用下的极限压强预测公式。通过将计算结果分别与模型试验的结果和有限元计算的结果进行比较 ,对公式进行了验证。最后还讨论了轴向压力和端部固支刚度对槽型舱壁极限强度的影响。

In this paper, formulas to calculate the ultimate bending moment of a beam-column were first derived using the elasto-plastic analysis.Then,simplified formulas for predicting the ultimate lateral pressure of corrugated bulkheads were derived using the beam-column theory.The formulas can take account of the influences of shear force and the elastically-fixed rigidity of adjoining structures. By comparing the results from present formulas with those of tests and numerical analyses,it has been shown that the formulas derived in this paper are accurate and reliable for engineering purposes.Thus,a more powerful design tool is provided.Finally,the effects of the shear force and rigidities of adjoining structures on the ultimate strength of corrugated bulkheads have also been studied.