Cold-formed thin-walled steel hollow flange beam (HFB) has been emerged and utilised structurally. It is composed of one or two closed flanges with high torsional stiffness and relatively flexible web. Hence, the global stability of such beam has greatly been improved compared with conventional I-beams with flat flanges, due to their superior torsional stiffness and stability. However, under concentrated loading, local flange deformation occurs easily at the load-action-region, because the tubular flange is hollow even if stiffeners are attached to the webs. Up-to-date, rather than filling the tubular flange with concrete, there is not any relevant literature or reports on how to improve the local buckling state of the hollow flange I-beams. Accordingly, in this paper, a stiffened compression rectangular hollow flange beam (SCHFB) is presented, from which the web penetrates the bottom wall of the top tubular flange until it reaches its top wall. By doing so, several concentrated loads may be applied safely on the beams or the segmental lunching technique may successfully be used to erect the beam in its place. This paper examines experimentally this stiffened beam and then extends to use the finite element modelling to replicate the actual behaviour of the beam. A numerical comparison between the SCHFB, conventional CHFB and I-beam shows that the ultimate bearing capacity and ductility are significantly enhanced in the case of SCHFB compared with the other two beams. Additionally, the SCHFB has been found to own better local deformation performance than that of the CHFB. However, with the span increase, the vertical concave deformation, lateral deformations at top flange and vertical deformations of top flange plate of the tubes of the SCHFB and CHFB may approach each other. So, the SCHFB becomes the best choice for short-span beams under either concentrated or distributed loading.

冷弯薄壁空心钢法兰翼梁（HFB）已经出现并在结构上得到利用。它由一个或两个具有高抗扭刚度和相对柔性的腹板的封闭法兰组成。因此，由于其优异的抗扭刚度和稳定性，与传统的带平法兰的工字钢相比，这种梁的整体稳定性得到了极大的改善。但是，在集中载荷下，由于即使加强筋连接到腹板上，管状法兰也是中空的，因此在载荷作用区域很容易发生局部法兰变形。关于如何改善空心法兰工字钢的局部屈曲状态，没有任何相关文献或报道。因此，在本文中，提出了一种加劲的压缩矩形空心翼缘梁（SCHFB），腹板从中穿透顶部管状法兰的底壁，直至到达顶壁。这样，可以将几个集中的载荷安全地施加到梁上，或者分段午餐技术可以成功地用于将梁竖立在其位置。本文通过实验检查了这种加劲梁，然后扩展到使用有限元建模来复制梁的实际行为。SCHFB，常规CHFB和工字梁之间的数值比较表明，与其他两个梁相比，SCHFB的极限承载力和延性得到了显着提高。此外，已发现SCHFB具有比CHFB更好的局部变形性能。但是，随着跨度的增加，垂直凹形变形，SCHFB和CHFB的管的顶部法兰的横向变形和顶部法兰板的垂直变形可能彼此接近。因此，SCHFB成为集中载荷或分散载荷下短跨度梁的最佳选择。