Abstract
The objective of this study is to make the experimental and finite element simulations of buckling behaviour of cold-formed steel (CFS) built-up hat-shaped closed section under simply supported end condition subjected to two-point loading. Numerical simulation is carried out using the software ABAQUS. The test result is compared with numerical results and good correlation is achieved. Next, for validation, a series of parametric studies are carried out using the validated numerical model, such as the effect of length, depth, width, thickness and angle of the inclined element. The local buckling and the interaction of local and flexural buckling are studied. To end with, a design equation is proposed in accordance with the direct strength method specification for CFS structure.
Highlights
In construction industries, two types of cross sections are familiar, one is an open section and another is closed section
The opening/holes in the web significantly affect the strength of the open section, whereas opening is not required in the case of the closed section
Comparison between the test and Finite Element Model (FEM) of the load–deflection curve and behaviour of the specimen is shown in Figs. 5, 6 and 7
Summary
Two types of cross sections are familiar, one is an open section and another is closed section. Xu et al (2009) have tested the flexural strength of CFS built-up box section. Alex and Iyappan (2016) carried out experimental and numerical studies on the flexural behaviour of CFS built-up section.
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