NUMERICAL AND EXPERIMENTAL STUDIES ON THE BEHAVIOUR OF STEEL-CONCRETE-STEEL BEAM: A REVIEW
Keywords:steel-concrete steel sandwich beam, shear connectors, steel cover plate, energy absorbing capacity, impact load and composite construction.
Steel-concrete-steel (SCS) beam comprises of a concrete core sandwiched in between two steel cover plates which are interconnected by shear connectors. The shear connectors prevent the uplift of the steel cover plates and hold the concrete core in position. Conventional RCC beams undergo huge damage due spalling of concrete when subjected to sudden shock loading and the conventional steel structures undergo drastic failure under fire loading due to high thermal conductivity. The SCS construction technique overcomes the disadvantages of conventional construction. In SCS system the high tensile strength of steel cover plates combines along with the high compressive strength of concrete enhancing the structural integrity, ductility, energy absorbing capacity and strength of the system. The use of composite construction has been increasing in recent years because of its high strength to weight ratio, efficient design, better structural performance and significant economies of cost and construction time. Some of the structural systems currently in practice are Steel Fibre Reinforced Concrete (SFRC), Profiled Steel Sheeting Reinforced Concrete (PSSRC), Laced Reinforced Concrete (LRC) and Steel–Concrete–Steel Sandwich (SCSS) composite. Among these alternative systems of construction, S-C-C construction is found to possess properties that are promising for higher flexural strength, impact and fire resistant structures. In this paper the numerical and analytical studies carried out to study the performance of SCS beams has been discussed.