Aluminium members are recently being used as main structural elements in residential, commercial and industrial buildings. Aluminium Lipped Channel Beam (LCB) is one of the popular thin-walled sections used in different applications in construction. Web openings are incorporated in these sections to accommodate building services when they are used as beams. Even though the bending, shear and web crippling behaviours of these sections were investigated in the past, their structural behaviour with web openings have not been investigated. Hence, experimental and numerical studies were conducted in this research to investigate the shear behaviour of these aluminium LCBs with web openings. An aspect ratio of one was considered in this study. A total of 17 tests were conducted first to investigate the shear behaviour of aluminium LCBs with circular web openings using three-point loading arrangement. Finite element models were developed with appropriate loading and boundary conditions and validated using the experimental results. A detailed parametric study was then undertaken using the currently available roll-formed aluminium LCBs with different thicknesses, grades and web opening sizes. The ultimate shear capacities and the shear capacity reduction factors obtained from the tests and finite element analyses were compared with the currently available design rules. This paper presents the details and results of the experimental and numerical studies on the shear behaviour of aluminium LCBs with circular web openings and the comparison with current and recently proposed design rules.

铝构件最近被用作住宅，商业和工业建筑物中的主要结构元件。铝唇槽形梁（LCB）是在建筑中的不同应用中使用的流行薄壁型材之一。这些部分中都集成了网孔，以在用作梁时提供建筑服务。尽管过去已经研究了这些部分的弯曲，剪切和腹板瘫痪行为，但尚未研究它们在腹板开口处的结构行为。因此，在这项研究中进行了实验和数值研究，以研究这些具有腹板开口的铝质LCB的剪切行为。在这项研究中考虑的纵横比为1。首先进行了总共17个测试，以研究采用三点加载布置的具有圆形腹板开口的铝制LCB的剪切性能。利用适当的载荷和边界条件开发了有限元模型，并使用实验结果进行了验证。然后，使用目前可用的具有不同厚度，等级和腹板开口尺寸的辊压成型铝质LCB进行了详细的参数研究。从测试和有限元分析中获得的极限抗剪承载力和抗剪承载力减小因子与当前可用的设计规则进行了比较。本文介绍了具有圆形腹板开口的铝质LCB的剪切行为的实验和数值研究的细节，结果以及与当前和最近提出的设计规则的比较。