Effect of web holes on web crippling strength of cold-formed steel channel sections under end-one-flange loading condition - Part II: Parametric study and proposed design equations

Abstract

General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. EFFECT OF WEB HOLES ON WEB CRIPPLING STRENGTH OF COLD-FORMED STEEL CHANNEL SECTIONS UNDER END-ONE-FLANGE LOADING CONDITION -PART II: PARAMETRIC STUDY AND PROPOSED DESIGN EQUATIONS General rightsCopyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policyThe Research Portal is Queen's institutional repository that provides access to Queen's research output. Every effort has been made to ensure that content in the Research Portal does not infringe any person's rights, or applicable UK laws. If you discover content in the Research Portal that you believe breaches copyright or violates any law, please contact openaccess@qub.ac.uk. AbstractA parametric study of cold-formed steel sections with web openings subjected to web crippling under end-one-flange (EOF) loading condition is undertaken, using finite element analysis, to investigate the effects of web holes and cross-section sizes. The holes are located either centred above the bearing plates or with a horizontal clear distance to the near edge of the bearing plates. It was demonstrated that the main factors influencing the web crippling strength are the ratio of the hole depth to the depth of the web, the ratio of the length of bearing plates to the flat depth of the web and the location of the holes as defined by the distance of the hole from the edge of the bearing plate divided by the flat depth of web. In this study, design recommendations in the form of web crippling strength reduction factor equations are proposed, which are conservative when compared with the experimental and finite element results.

Structural behaviour of optimized cold‐formed steel beams

“…crippling behaviour of European-grade CFS beams with web openings [43][44][45][46][47][48][49][50]. Fig.…”

Assessment of web crippling design provisions for application to proprietary soldier beams

“…These approaches focused on evaluating the influence of web holes on the web crippling strength of coldformed lipped channel sections [42][43][44]. Although research into the web crippling response of cold-formed C-sections is available [47][48][49][50][51], the geometries examined in these studies significantly differ from the geometry of the proprietary beams and/or the loading conditions pertinent in the present investigation. The following subsections provide an insight into the current design provisions for web crippling and present the results of the assessment, while an in-depth analysis of the results follows in section 4.…”

Effect of Circular Openings on Web Crippling of Unlipped Channel Sections Under End-Two-Flange Load Case

“…However, the removal of the circular web part from the unlipped channel reduces the carrying area of the point loads and reactions and makes the profile more critical under web crippling. The behaviour of lipped channels under web crippling has been investigated without [1][2][3][4][5] and with the opening [6][7][8][9][10][11][12][13][14][15][16][17] at its webs, which is different from the performance of unlipped channels. However, the behaviour of unlipped channels with an opening has not explored in the past.…”