Cyclic Lateral Behaviour Of Cold Formed Steel Double Skinned Concrete Infilled Beam-Column With Outer Square and Inner Circular Sections

Abstract

The present study focus on the comparative study of light gauge double skinned steel beam-column specimen
in-filled concrete between the skins(with outer square and inner circular sections), with that of light gauge beam-column
specimens fully filled with concrete. The specimens were subjected to constant axial loads and varying lateral loads. Fly
ash concrete with 40 % fly ash was used in the investigation and Lateral load capacity; Ductility and Weight of
specimens were compared. A magnitude of 190kN was used to apply constant axial compressive load with a maximum
lateral capacity of 200kN. The vertical load was chosen to design compression rate 40 % of axial resistance found in the
analysis. The results obtained after the specimens tested at 28 days of curing such that strength capacity(lateral load
capacity), ductility of the double sk inned steel beam-column in-filled concrete specimens increased by 4.45 % and 13.6
% respectively with reduced weight compared to control specimens(sections fully filled with fly ash concrete). Hence
with a reduced specimen weight due to less amount of concrete required, higher lateral load capacity and higher
ductility for concrete in-filled double skinned beam-columns, they are more adaptable for structures in seismic regions