Design of stainless steel elliptical hollow sections columns in case of fire: parametric study
Design of stainless steel elliptical hollow sections columns in case of fire: parametric study
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不锈钢椭圆空心型材柱的火灾设计：参数研究
DOI：
10.1002/cepa.1442
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
P. Real
中科院分区：
文献类型：
--
作者：
F. Arrais;N. Lopes;P. Real
不锈钢作为结构材料的应用不断增加，因为它具有许多理想的品质，例如耐用性、耐腐蚀性和美观的外观。由于与碳钢相比，它具有更高的耐火性，因此在某些情况下可以无需热保护。除了美观性之外，椭圆形空心型材还融合了圆形空心型材的建筑属性和矩形空心型材的结构优点。它们比开口截面具有更好的扭转性能，并且由于其形状，与圆形空心型材相比，它们具有更高的弯曲强度。因此，不锈钢材料与椭圆空心截面的应用是一种有趣的设计选择。本研究的主要目的是进行参数研究，以了解椭圆空心截面轴向压缩不锈钢柱的防火性能，并分析这些构件的欧洲规范 3 设计方法的安全性和准确性。通过将获得的极限承载能力与欧洲规范 3 规定进行比较，得出的结论是该设计方法不适用于此类横截面轮廓。
The application of stainless steel as a structural material has been increasing, due to a number of desirable qualities such as its durability, resistance to corrosion and aesthetic appearance. Since it has a higher fire resistance when compared to carbon steel, it allows in some cases the absence of thermal protection. In addition to the aesthetic nature, elliptical hollow sections integrate the architectural attributes of the circular hollow sections and the structural advantages of the rectangular hollow sections. They have a better torsional behaviour than open sections and due to their shape they have a higher bending strength when compared to circular hollow profiles. Hence, the application of the material stainless steel combined with elliptical hollow sections stands as an interesting design option. The main objective of this study is to perform a parametric study to understand the fire behaviour of stainless steel columns subjected to axial compression, with Elliptical Hollow Sections and to analyse the safety and accuracy of the Eurocode 3 design methodology for these members. From comparing the obtained ultimate load bearing capacities with Eurocode 3 prescriptions, it is concluded that this design methodology is not suitable for this type of cross‐section profiles.