Study on Behaviour of Steel Concrete Composite Beams

Abstract

Steel concrete composite beams (SCCB) are widely used nowadays in offshore bridges and high-rise buildings because of their high span to depth ratio, high strength, ductility, light weight and rapidity in construction. SCCB consists of concrete slab and steel beam connected by shear connectors. It is an important compositional structure in prefabricated construction. In SCCB the concrete slab provides compressive strength and steel beam provides tensile strength. The behaviour of SCCB mainly depend on type of loading applied on the structure, environmental conditions etc.
Bridges and industrial structures in general, are commonly subjected to cyclic loading of vehicles or operating machines. So, the behaviors study on composite structures under fatigue is essential. The structural elements in SCCB is subjected to local buckling or Lateral Distortional Buckling (LDB). This made it important to study the stability behaviour of SCCB.
Stainless steel-concrete composite beam has been regarded as a new application that is widely used by engineering community. The benefits brought by stainless steel, such as superior corrosion and fire resistance, high strength and ductility as well as improved durability, could offer optimal and sustainable solutions for infrastructures and highways. This study is focussed on the behaviour of SCCB under cyclic loading, bending, shear, combined bending and shear and also on stability aspects.