多孔钢板在双轴受压与边缘剪力荷载共同作用下的极限强度

Ultimate Strength of Perforated Steel Plates Under Combined Biaxial Compression and Edge Shear Loads

作为作者系列研究成果[Paik J K.Ulti-mate strength of perforated steel plates under edge shear loading.Thin-Walled Structures,2007,45:301-6,Paik J K.Ultimate strength of perforated steel plates under axial compressive loading alongshort edges.Ships Offshore Struct,2007,2(3):(in press)]的终结篇,与前期论文在边缘剪力或单轴压力荷载方面进行了对比,目的是研究双轴受压和边缘剪力作用下多孔钢板的极限强度特点,这是船舶和船舶型海洋结构在货物和水压作用下的一个典型受力模式。板的约束考虑为四边简支,中心区域为圆形孔。一系列ANSYS非线性有限元分析中考虑了不同的板尺寸(厚度)。在有限元分析基础上,推导出组合荷载下多孔板的极限强度交互关系公式,可用于可靠性分析或规范中极限强度的预测。

The present paper is a sequel to the author＇s papers E Paik J K. Ultimate strength of perforated steel plates under edge shear loading. Thin-Walled Structures, 2007, 45：301 -306; Paik J K. Ultimate strength of perforated steel plates under axial compressive loading along short edges. Ships Offshore Struct, 2007, 2（3） ： [in press）]. In contrast to the previous papers with the focus on edge shear or uni- axial compressive loads, the aim of the present study is to investigate the ultimate strength characteristics of perforated steel plates under combined biaxial compression and edge shear loads, which is a typical action pattern of steel plates arising from cargo weight and water pressure together with hull girder motions in ships and ship-shaped offshore structures. The plates are considered to be simply supported along all （four） edges, keeping them straight. The cut-out is circular and located at the center of the plate. A series of ANSYS nonlinear finite element analyses （FEA） are undertaken with varying the plate dimension （thickness）. Based on the FEA results obtained, closed-form empirical formulae of the ultimate strength interaction relationships of perforated plates between combined loads, which can be useful for first-cut estimations of the reliability analyses Or code calibrations, ultimate strength in are derived.