BUCKLING ANALYSIS OF RECTANGULAR HOLLOW FLANGE COLD FORMED STEEL SECTION
M.Monisa Sivagami
P.G.Student, Department of Structural Engineering, Government College of Technology, Coimbatore, India , IN
Prof. G.Dhamodhara Kannan
P.G.Student, Department of Structural Engineering, Government College of Technology, Coimbatore, India , IN
Dr.P.Suresh Kumar
P.G.Student, Department of Structural Engineering, Government College of Technology, Coimbatore, India , IN
Keywords: Cold Formed Steel, Aspect Ratio, Buckling Modes, Local Buckling, SCC, Finite Element Analysis and ABAQUS 6.16
Abstract
Cold formed steel is preferred over hot rolled steel section because of its high strength to weight ratio. Open cold formed steel sections such as C, Z and hat sections are commonly used but they suffer certain buckling modes due to their mono symmetric and eccentricity of shear centre to centroid. Hence hollow sections with two torsionally rigid rectangular hollow flange sections connected by a web are invented in order to eliminate the buckling failures and to increase their load carrying capacities. This study aims to investigate the buckling behaviour of RHFB analytically using ABAQUS 6.16. The aspect ratio of hollow flanges varied as 1, 1.6, 2 with varying thickness as 1.2, 1.6, 2 mm. The stiffeners are placed at a distance of L/3 from both ends. The length of all the specimens are kept constant as 2000 mm. The coupon test was conducted to obtain the material properties. Finally the analytical results for the sections is compared to find out the optimal section exhibiting better load carrying capacity and flexural behaviour.
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