Web Crippling Design of Cold-formed Ferritic Stainless Steel Unlipped Channels with Web Holes and with Fastened Flanges Under End-two-flange loading Condition – Part I: Experimental Tests and Numerical Validation (original) (raw)
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2017
An extensive parametric study of cold-formed ferritic stainless steel unlipped channels with fastened flanges subjected to web crippling under end-two-flange (ETF) loading condition is undertaken, using quasi-static finite element analysis, to investigate the effects of web holes and cross-sections sizes. Both cases of unlipped channels with and without web holes are considered. The web holes are located either centred or offset to the load and reaction plates. It is noted that no cold-formed stainless steel standard provides capacity reduction factors for unlipped channels with fastened flanges subject to end-two-flange loading condition. The strengths obtained from reduction factor equations are first compared to strengths calculated from equations recently proposed for cold-formed stainless steel lipped channels. It is demonstrated that the strength reduction factor equations previously proposed for cold-formed stainless steel lipped channels can be unconservative for cold-formed...
Buildings, 2021
This paper investigates the interior-one-flange web crippling strength of cold-formed steel channels at elevated temperatures. The stress-strain curves of G250 and G450 grade cold-formed steel (CFS) channels at ambient and elevated temperatures were taken from the literature and the temperatures were varied from 20 to 700 °C. A detailed parametric analysis comprising 3474 validated finite element models was undertaken to investigate the effects of web holes and bearing length on the web crippling behavior of these channels at elevated temperatures. From the parametric study results, it was found that the web crippling strength reduction factor is sensitive to the changes of the hole size, hole location, and the bearing length, with the parameters of hole size and hole location having the largest effect on the web crippling reduction factor. However, the web crippling strength reduction factor remains stable when the temperature is changed from 20 to 700 °C. Based on the parametric a...
Web Crippling Capacity of Cold Formed Steel Channel Sections With and Without Openings
IRJET, 2022
Steel is an important construction material since ancient days. Among steel, Cold Formed Steel (CFS) are getting more popular due to its advantages including light weight, high strength to weight ratio, resistance to fire etc. These are the sections which are shaped near room temperature. CFS channel sections are commonly used nowadays as bearing and non-load bearing walls, partition walls, in multi-rise buildings, framings. In this channel sections the holes are provided in the web portion for plumbing services and installation of ducts. However such opening made the section more vulnerable to failures including web crippling and web buckling. In this paper various parameters which affect the web crippling capacity of the channel sections are analyzed and the analysis is also done to find the optimum location of web holes in the channel sections.