Validated Methodology for Assessment of Welded Steel Structures by Nonlinear Finite Element Analysis

Martin Eriksson, Magnus Nyberg, Michael Andersen, Jesper Tychsen, Jørgen Nielsen
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Abstract

Nonlinear finite element analysis is a powerful tool for the determination of ultimate capacities of steel components. To produce reliable predictions with high confidence of structural strength, it is of fundamental importance that nonlinear finite element analyses are based on a validated methodology. This paper presents a validated methodology with statistically calibrated failure (fracture) criteria providing either a characteristic or mean level of capacity/response for the detailed finite element assessment of strength of typical structural details forming a part of offshore structures. More than 60 large-scale physical tests representing plated details/joints as well as tubular joints form the basis of the developed methodology.
通过非线性有限元分析评估焊接钢结构的验证方法
非线性有限元分析是确定钢构件极限承载力的有力工具。非线性有限元分析必须以经过验证的方法为基础,才能对结构强度做出可靠的预测,并具有较高的可信度。本文介绍了一种经过验证的方法,该方法具有经过统计校准的失效(断裂)标准,可为构成海上结构一部分的典型结构细节的强度详细有限元评估提供特征或平均水平的能力/响应。60 多项大型物理测试代表了镀层细节/连接以及管状连接,这些测试构成了所开发方法的基础。
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