CONFERENCE / REACT-2024

Over the last decade, there has been a significant growth in research efforts to enhance the flexural behavior of Cold formed steel (CFS) built-up beams by proposing different strengthening methods to prolong or eradicate buckling deformations. This paper discusses numerical study on the development of optimum lightweight cold-formed steel composite built-up beams. This study aims to develop CFS composite built-up beams that are not only lightweight but also possess high strength and stiffness. To evaluate the performance CFS composite built-up beams with varying infill lightweight materials. Glass Fiber Reinforced Polymer (GFRP) and Ultra Lightweight Cement Composite (ULCC) were sandwiched between the CFS channels in the web and flange region to construct the lightweight composite beams. GFRP in flange and GFRP in web composite specimen (GFGWS) shows increase in load carrying capacity by 140% compared to no filled CFS built-up beams. The project evaluates the effectiveness of various stiffening arrangements of bearing stiffeners in CFS composite built-up beams. The diffe rent arrangement of bearing stiffeners are vertical, Longitudinal, Diagonal end and V shaped middle plus Diagonal end patterns.GFGWS with Longitudinal Stiffeners shows good performance compared to other arrangements of bearing stiffeners.The research aims to develop an optimum section of intermittently stiffened lightweight CFS composite built-up beams.The various combinations of intermittent stiffening and GFRP plank packing were adopted to improve the performance of beam.Multi-folded flange with flange and web packed GFRP composite specimen (MGFGWS) show 22% of weight reduction compared to GFGWS built-up beams,it shows good performance in case of cost-effective approach. All of the beam specimens were subjected to four-point bending with simply supported boundary conditions. The study considers the load- carrying capacity, deflection, Moment capacity, ductility and stiffness characteristics of the composite beams.This complete study is performed analytically using ANSYS software.