Cold-formed steel (CFS) channel beams are an increasingly popular choice as load-carrying members in building structures. Such channel beams often include web holes for installation of services. Traditional web holes are normally punched and are un-stiffened. This can restrict the size and spacing of web holes. Recently, a new generation of CFS channel beams with edge-stiffened web holes has been developed and used widely in New Zealand. However, no experimental investigation has been reported in the literature for such channel beams under bending. In this paper, a total of 215 results comprising 16 four-point bending tests and 199 finite element analysis (FEA) are reported on the moment capacity of CFS channel beams with both edge-stiffened and un-stiffened web holes. For comparison, channel beams without web holes were also tested. For all specimens, initial imperfections were measured using a laser scanner. A nonlinear elasto-plastic finite element (FE) model was also developed, and the results showed good agreement with the test results. A parametric study was conducted using the validated FE model to investigate the effects of beam length, hole diameter, stiffener length and fillet radius on the moment capacity of CFS channel beams. It is shown that for the case of a channel beam with five edge-stiffened web holes, the moment capacity increased by as much as 14.5%, compared to that of a plain channel beam. For comparison, the same section with un-stiffened web holes had a 13.6% reduction in moment capacity, compared to that of a plain channel beam. Furthermore, the accuracy of current design guidelines in accordance with the American Iron and Steel Institute (AISI) and Australia/New Zealand (AS/NZ) standards were verified by comparing the tests and FEA results against the design strengths for moment capacity of CFS channel beams without web holes. On the other hand, for CFS channel beams with web holes, the moment capacity obtained from tests and FEA were compared against the moment capacity calculated from the design equations of Moen and Schafer. Upon comparison, it was found that the AISI and AS/NZS can closely predict the moment capacity of CFS channel beams without web holes. The Moen and Schafer design equations were found to be over-conservative by around 11% and 28% for moment capacity of CFS channel beams with un-stiffened and edge-stiffened web holes, respectively.

冷弯型钢（CFS）槽形梁作为建筑结构中的承载构件越来越受欢迎。这种通道梁通常包括用于安装服务的腹板孔。传统的腹板孔通常是打孔的，没有打硬。这会限制腹板孔的大小和间距。最近，已经开发了具有边缘加固腹板孔的新一代CFS通道梁，并在新西兰得到广泛使用。然而，在文献中没有关于弯曲下的这种通道梁的实验研究的报道。在本文中，共报告了215个结果，包括16个四点弯曲测试和199个有限元分析（FEA），这些结果包含了带有边加筋和未加筋腹板孔的CFS通道梁的弯矩承载力。为了进行比较，还测试了没有腹板孔的通道梁。对于所有样品，使用激光扫描仪测量初始缺陷。还建立了非线性弹塑性有限元模型，其结果与试验结果吻合良好。使用已验证的有限元模型进行了参数研究，以研究梁长度，孔直径，加劲肋长度和圆角半径对CFS通道梁的弯矩承载力的影响。结果表明，对于带有五个边缘加劲腹板孔的通道梁，其矩承载力与普通通道梁相比提高了14.5％。为了进行比较，与普通槽形梁相比，具有未加强腹板孔的同一截面的弯矩承载力降低了13.6％。此外，通过比较测试和FEA结果与无CFS通道梁的弯矩承载能力的设计强度进行比较，验证了符合美国钢铁协会（AISI）和澳大利亚/新西兰（AS / NZ）标准的当前设计指南的准确性网孔。另一方面，对于带有腹板孔的CFS通道梁，将通过测试和有限元分析获得的弯矩承载力与根据Moen和Schafer的设计公式计算出的弯矩承载力进行比较。通过比较，发现AISI和AS / NZS可以紧密预测没有腹板孔的CFS通道梁的弯矩能力。发现Moen和Schafer设计方程对于带有未加劲肋和边加劲腹板的CFS通道梁的弯矩能力分别保守约11％和28％。