Journal of Materials and Engineering Structures
Volume 9, Numéro 1, Pages 49-60
2022-03-30
Study The Effect Of Intermediate And Closer Stiffener On The Behaviour Of The Cold - Formed Steel Lipped Channel Section Under Axial Compression
Authors : Sangeetha P. . Shanmugapriya M. . Manjula R. . Vijay Aparna P. . Sooraj K. .
Abstract
Cold-Formed steel built-up columns are commonly used as compression member in the industrial roof and long span bridge structures to carry larger load. To improve the strength and stiffness of the cold-formed section, the built-up column with additional stiffeners and lacings are used. This paper reports the results of experimental tests conducted on built-up cold-formed columns, composed with the combination of intermediate and closer stiffeners with pin-ended condition under axial compression. Totally twelve columns with or without intermediate and closer stiffeners were tested to failure. The experimental results aim to quantify the effect of cross-section, intermediate and closer stiffener on the overall performance, including strength, strain and failure modes for the built-up column. The Finite element model was developed by ANSYS software and the model is validated with the experimental results. The built-up column strength predicated by recommended design equations of American Iron and Steel Institute (AISI) exhibited good agreement with the ultimate load of built-up columns obtained both by experimental and numerical. Based on this study a recommendation is proposed to DSM for the CFS built -up columns with intermediate and closer stiffeners.
Keywords
Intermediate stiffener ; closer stiffener ; built – up columns ; cold – formed steel, ANSYS, AISI
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