Abstract
The paper presents a study of behaviour of axially loaded columns that consist of two flanges and a thin triangularly corrugated web, connected by automatic welding. In the literature, the buckling behaviour of steel columns was dealt with mostly for members with plate webs. Researches of that problem for columns with corrugated webs were found out to be very limited. A parametric study is carried out for various column slenderness and corrugation densities. A general-purpose finite element analysis software ABAQUS was used. The corrugation densities adopted in this study represent practical geometries, which are commonly used for such structures in building practice. Plot showing the influence of section slenderness on value of reduction factor for lateral buckling is presented. It is determined that existing buckling curves poorly describe the dependence of the reduction factor on slenderness for axially compressed members with triangularly corrugated webs. Finally, recommendations were proposed for the design of pin-ended columns with corrugated webs at lateral buckling in accordance with numerical results.
Highlights
Corrugated webs are often used in building practice to reduce metal consumption and increase the rigidity of the I-sections
All models were assumed to elastic buckle under perfect conditions without any initial imperfections
Overall view of the global buckling mode that was obtained from lateral buckling analysis is shown in fig. 2b
Summary
Corrugated webs are often used in building practice to reduce metal consumption and increase the rigidity of the I-sections Nowadays such structures are generally used as ceiling girders in multi-story apartment houses, large span roof girders in industrial and administrative buildings, etc. From such profiles, it is possible to produce column compressed elements and the whole building frame – see fig. Due to so-called “accordion effect” [1-3, 7] the normal stresses along the height of the web are significant just in narrow areas near the flanges and insignificant for most of the web height Results compared with estimations of the currently available design guidance [3, 8-11]
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