Cross-sectional optimization of cold-formed steel channels to Eurocode 3
Cross-sectional optimization of cold-formed steel channels to Eurocode 3
复制标题
符合欧洲规范 3 的冷弯槽钢横截面优化
DOI：
10.1016/j.engstruct.2015.07.051
复制
发表时间：
2015
影响因子：
5.5
通讯作者：
Ma W
中科院分区：
文献类型：
--
作者：
Ma W
冷弯薄壁型钢结构体系在现代建筑中应用广泛。然而，确定最佳的横截面几何形状的冷弯型钢元件是一个复杂的问题，因为这些成员的强度控制的组合的局部，畸变，和全球屈曲。本文提出了一种方法，以获得优化的槽钢截面用于压缩或弯曲。一个简单的唇缘C形作为起点，但优化过程允许添加双折（返回）唇缘，倾斜唇缘和三角形腹板加劲肋。横截面相对于其结构能力进行优化，根据相关的欧洲规范（EN 1993 -1-3），使用遗传算法确定。因此，所有板细长极限值和由欧洲规范设定的横截面部件的相对尺寸的所有极限都被考虑作为优化问题的约束。对不同的柱长进行了压缩优化，并考虑了由局部屈曲引起的有效质心移动的影响。详细的有限元模型用于确认通过优化过程获得的容量的相对增益。
Cold-formed steel structural systems are widely used in modern construction. However, identifying optimal cross section geometries for cold-formed steel elements is a complex problem, since the strength of these members is controlled by combinations of local, distortional, and global buckling. This paper presents a procedure to obtain optimized steel channel cross-sections for use in compression or bending. A simple lipped C-shape is taken as a starting point, but the optimization process allows for the addition of double-fold (return) lips, inclined lips and triangular web stiffeners. The cross-sections are optimized with respect to their structural capacity, determined according to the relevant Eurocode (EN1993-1-3), using genetic algorithms. All plate slenderness limit values and all limits on the relative dimensions of the cross-sectional components, set by the Eurocode, are thereby taken into account as constraints on the optimization problem. The optimization for compression is carried out for different column lengths and includes the effects of the shift of the effective centroid induced by local buckling. Detailed finite element models are used to confirm the relative gains in capacity obtained through the optimization process.
宽薄壁钢梁翼缘应力分布及等效宽度
DOI：
--
发表时间：
1940
期刊：
影响因子：
--
作者：
G. Winter
通讯作者：
G. Winter