Steel beams with web openings are extensively used in commercial structures because of their advantages in saving headroom and for providing a passage for utilities like air ducts, water pipes, etc. Design guidelines for such beams are provided by the EuroCode3 and by AISC design guide. The Indian Standard does not provide the design guides and thus an attempt has been made in this paper to utilize the approach for common beams given in IS800:2007 to obtain design bending strength for cellular beams. Finite element analysis has been carried out to obtain predicted values of bending strength of cellular beams. In order to validate the finite element model developed for this study, few examples of cellular beams were selected from literature and the results were compared. Ultimate load at failure, mid-span displacement and modes of failure were the parameters used to validate the developed model. Beam models with three grades of steel (E250, E350 and E450) and varying slenderness values covering section categories from plastic to semi-compact have been analyzed. It was found that while the specifications can conservatively predict the bending strength for E250 grade steel, they were found to be quite unconservative for higher grades and specially for the beams having semi-compact webs.

带有腹板开口的钢梁具有节省空间和为公用设施（例如风道，水管等）提供通道的优势，因此广泛用于商业结构。此类钢梁的设计指南由EuroCode3和AISC设计指南提供。印度标准没有提供设计指南，因此本文尝试使用IS800：2007中给出的普通梁的方法来获得蜂窝梁的设计抗弯强度。已经进行了有限元分析以获得蜂窝梁抗弯强度的预测值。为了验证为该研究开发的有限元模型，从文献中选择了几个细胞束示例，并对结果进行了比较。失败时的最终负载 中跨位移和破坏模式是用于验证开发模型的参数。分析了具有三种钢种（E250，E350和E450）且细长值变化的横梁模型，其覆盖范围从塑料到半紧凑型。已经发现，尽管规格可以保守地预测E250级钢的抗弯强度，但发现它们对于较高等级的钢，特别是对于具有半紧凑腹板的梁而言，是非常不保守的。