الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
This research enhances current design approaches for Cold-Formed Steel (CFS) sections in compliance with the codified Effective Width Method (EWM). The EWM is typically employed to estimate compromised structural integrity when predicting the nominal strength due to the local buckling of cold-formed steel. This limitation arises from the traditional estimation of the plate buckling coefficient (k) with no interaction between the sub-elements. Hence, these methods are considered conservative, restricting the structural enhancement of CFS in a broader range of construction manufacturing. In this study, a Finite element model (FEM) has been executed to quantify the accuracy of these design methods, validated against experimental tests with geometric imperfections and true stress-strain curves. A subsequent parametric study is carried out on different geometric parameters of lipped-channel cross-sections under various loading conditions (pure compression, major axis bending, and minor axis bending). This study reveals a strong correlation between the most effective parameter (web height-to-flange width) and (k). Based on previous studies, elastic buckling solutions are investigated using finite strip analysis to characterize the effect of previously studied expressions for (k). These expressions exhibit superior performance in simulating the restraining effect between adjacent sub-elements by conducting elastic local buckling analysis. An extended parametric study for the inelastic ultimate strength is implemented across different design methods, exploring varying values of (k) for several lipped channel cross-sections. This study aims to evaluate the (k) coefficient for CFS lipped channel, highly dependent on plate boundary conditions represented in adjacent element dimensions and restraining interactions. It is revealed that considering the restraining interaction in different design approaches aligned with the EWM plays an adequate role in enhancing the buckling strength of CFS lipped-channels, considering local buckling behavior.