This paper presents a numerical investigation on the design resistance of extruded aluminum beams subjected to concentrated loads. The study is conducted through nonlinear finite element analysis considering large displacements, initial imperfection, and taking into account the strain hardening characteristics of common aluminum alloys. The numerical model is validated against experimental works taken from the literature. Thereafter, an extensive parametric study is carried out covering a wide range of beam geometries and slenderness ratios. Resistances computed numerically are compared with those calculated using the current design provisions in the EC9 for aluminum beams subject to concentrated loads, indicating that the EC9 provisions underestimate the resistances. Then, a new resistance function is calibrated performing a statistical evaluation of experimental and numerical results. The reliability of the recalibrated resistance function is assessed according to EN 1990, the results show improvements in the predicted resistances. Finally, the use of more accurate structural design provisions enhances the possibility of higher economic benefits, and by using less material, the carbon footprint originated from aluminum production can be reduced.

本文对承受集中载荷的挤压铝梁的设计抗力进行了数值研究。该研究是通过非线性有限元分析进行的，其中考虑了大位移，初始缺陷，并考虑了普通铝合金的应变硬化特性。数值模型是根据文献中的实验工作进行验证的。此后，进行了广泛的参数研究，涵盖了大范围的光束几何形状和细长比。将通过数值计算得到的电阻与使用EC9中针对承受集中载荷的铝梁的当前设计规定所计算的电阻进行比较，这表明EC9规定低估了电阻。然后，校准了新的电阻功能，对实验和数值结果进行了统计评估。重新校准的电阻功能的可靠性根据EN 1990进行评估，结果表明预测电阻得到了改善。最后，使用更精确的结构设计规定增加了获得更高经济效益的可能性，并且通过使用更少的材料，可以减少源自铝生产的碳足迹。