The behavior of eight Cold-Formed Steel (CFS) beams was numerically and experimentally investigated. Each beam was built by assembling two single CFS channel sections from the same CFS sheet with or without intermediate web stiffeners (discontinuous inclined stiffeners; triangular, trapezoidal, and discontinuous linear stiffeners) back-to-back at the web or face-to-face at the flange using screws. The moment capacities of the face-to-face and the back-to-back specimens were determined via four-point and three-point bending tests, respectively. Finite element (FE) models were employed, and their results were validated using the test outcomes. The models predicted well the performance of CFS built-up beams with or without web stiffeners. For both the face-to-face and back-to-back beams, the beam with a triangular stiffener had the highest capacity and that with a discontinuous linear web stiffener had the largest ductility. This study was extended by a parametric study that included 24 beams using the validated model to investigate the effect of stiffeners, whether for web or flange on the behavior of CFS beams under various failure modes.

对八根冷弯型钢 (CFS) 梁的行为进行了数值和实验研究。每根梁都是通过将同一 CFS 板的两个单个 CFS 槽形截面组装而成，带有或不带有中间腹板加劲肋（不连续倾斜加劲肋；三角形、梯形和不连续线性加劲肋）在腹板上背对背或面对面组装在法兰上使用螺钉。面对面和背对背试样的弯矩能力分别通过四点和三点弯曲试验确定。采用有限元 (FE) 模型，并使用测试结果验证其结果。这些模型很好地预测了带或不带腹板加劲肋的 CFS 组合梁的性能。对于面对面和背靠背梁，带有三角形加劲肋的梁具有最高的承载力，带有不连续线性腹板加劲肋的梁具有最大的延展性。该研究通过包括 24 根梁的参数研究进行了扩展，该研究使用经过验证的模型来研究加强筋的影响，无论是腹板还是翼缘对 CFS 梁在各种失效模式下的行为。