Numerical analysis of newly developed Angelina beams: Fid-Bau Portal

Numerical analysis of newly developed Angelina beams

Choudhari, Vinod A. / Morkhade, Samadhan G.

There is a rising trend of adopting openings in the web of hot rolled as well as in cold formed steel beams for large span structures. The common types of openings provided are hexagonal, circular, square, octagonal and elongated circle. The objectives of web openings are to provide the platform for the inclusion of electric and AC pipes as well as to achieve the aesthetic appearance of the structures. The present study involves the analysis of cold formed steel beams with newly developed sinusoidal shape of web openings, which is also called ‘Angelina Beams’. The analysis is performed using finite element-based software ABAQUS 2020. The analysis is about studying the behaviour of innovative shape of web opening in steel beams, which was first developed by ArcelorMittal for the Angelina TM beam. The investigation is carried out by generating a finite element model of cold formed steel beams of varying the depth of section like CFS420, CFS450, and CFS480 with sinusoidal shape web openings. This means cold formed steel Angelina beams with depth of 420 mm, 450 mm and 480 mm, respectively. To verify the accuracy of FE models adopted in the present study, a detailed validation is carried out with the existing available experimental results. After that, a comparison has been made with Angelina Beams provided with and without flange cover plate. Due to the presence of regularly spaced web openings along the span, there is reduction in the shear as well as the flexural strength capacity. Therefore, there is a need to adopt the suitable strengthening technique, to strengthen the Angelina Beams. The observed failure modes are flange local buckling, web-post buckling and vierendeel mechanism.