Abstract Plastic deformation of plates in steel deck structures under heavy vehicle or helicopter wheel loads is common in ships and offshore structures, and is therefore of significant interest to designers of ro-ro/cargo ships, helicopter-carrying ships and offshore platforms. To provide insight into the plastic deformation of plates, the nonlinear elasto-plastic response of stiffened steel plates loaded quasi-statically by a central rigid rectangular indenter is investigated both experimentally and numerically. The numerically-determined stiffened plate permanent deflections compare well with those obtained experimentally. The concept of applying the elasto-plastic method to the design of deck plates under wheel patch loads is introduced, and the design principle of wheel patch loaded plating is studied together with the design criteria. A simple design formula to determine plating thickness is proposed based on an acceptable level of permanent set. Ship-mounted helideck plating design cases are given to illustrate the elasto-plastic method, and comparisons are made between the thicknesses derived using the proposed design formula and those found from Lloyd's Register (LR), Bureau Veritas (BV) and DNV-GL rule requirements.

中文翻译：

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具有容许塑性变形的准静态贴片荷载作用下钢甲板的设计方法

摘要 重型车辆或直升机轮载荷下钢甲板结构的板塑性变形在船舶和海上结构中很常见，因此引起滚装船/货船、直升机运载船和海上平台的设计者的极大兴趣。为了深入了解板的塑性变形，通过实验和数值研究了由中央刚性矩形压头准静态加载的加筋钢板的非线性弹塑性响应。数值确定的加筋板永久挠度与实验获得的挠度比较好。介绍了将弹塑性方法应用于轮补载荷下甲板设计的概念，并结合设计准则研究了轮补载荷板的设计原理。基于可接受的永久变形水平，提出了确定电镀厚度的简单设计公式。给出了船载直升机甲板板设计案例来说明弹塑性方法，并在使用建议的设计公式得出的厚度与根据劳氏船级社 (LR)、Bureau Veritas (BV) 和 DNV-GL 规则得出的厚度之间进行比较要求。