Abstract The paper focuses on the ultimate strength of perforated platings with circular openings and manholes, eventually reinforced by ringed or carling stiffeners, in order to develop a comprehensive and rationale format, useful to assess the ultimate capacity of perforated plate panels under uniaxial compression. In this respect, a large number of FE simulations is performed by Ansys Mechanical APDL, in order to provide new design formulas for the ultimate strength of platings with circular openings or manholes and, subsequently, for perforated plate panels reinforced by local stiffeners. The design formulas are developed by properly varying the opening size and the scantlings of ringed or carling stiffeners, in order to provide a comprehensive set of design curves. Hence, the incidence of the opening longitudinal position on the ultimate capacity of perforated platings, without and with local stiffeners, is also investigated. Finally, the proposed equations are applied in a straightforward design example. Based on current results, the new design formulas allow a reliable assessment of the ultimate capacity of platings with circular openings or manholes and the incidence of local stiffeners on the plating ultimate strength, so providing a rationale design format that could be easily embodied in current Rules and guidelines.

中文翻译：

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单轴压缩下圆形开口和人孔板极限强度的改进设计公式

摘要 本文重点研究具有圆形开口和人孔的穿孔板的极限强度，最终由环形或卡林加强筋加强，以开发一种全面和合理的格式，用于评估单轴压缩下穿孔板面板的极限容量。在这方面，Ansys Mechanical APDL 执行了大量有限元模拟，以便为具有圆形开口或检修孔的板的极限强度提供新的设计公式，随后为局部加强筋加固的穿孔板面板提供新的设计公式。设计公式是通过适当改变开口尺寸和环形或卡林加强筋的尺寸来制定的，以提供一套全面的设计曲线。因此，还研究了开口纵向位置对穿孔板极限承载力的影响，没有和有局部加强筋。最后，建议的方程应用于一个简单的设计示例。根据当前的结果，新的设计公式可以可靠地评估具有圆形开口或人孔的板的极限容量以及局部加强筋对板极限强度的影响，从而提供了一个可以轻松体现在当前规则中的基本设计格式和指导方针。