Numerical Modeling and Design of Lipped Channel Beams Subject to Web Crippling under One-Flange Load Cases

Sundararajah, Lavan, Mahendran, Mahen and Poologanathan, Keerthan (2019) Numerical Modeling and Design of Lipped Channel Beams Subject to Web Crippling under One-Flange Load Cases. Journal of Structural Engineering, 145 (10). 04019094. ISSN 0733-9445

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Official URL: https://doi.org/10.1061/(ASCE)ST.1943-541X.0002367

Abstract

Web crippling failure governs the behavior of thin cold-formed steel lipped channel beams (LCBs) used in floor systems. This paper describes a numerical modeling–based research study undertaken to investigate the web crippling behavior of LCBs under one-flange load cases and to develop improved design equations for possible inclusion in the cold-formed steel design standards. Finite-element models were developed to simulate the web crippling behavior of LCBs and their accuracy was verified using 36 web crippling tests of LCBs conducted under one-flange load cases using the new standard test method. A detailed numerical parametric study was then undertaken to investigate the web crippling behavior of LCBs using the verified finite element models of LCBs. This numerical parametric study provided an extensive web crippling capacity database and improved the understanding of the effects of key web crippling parameters such as inside bent radius, bearing length, and yield stress on the web crippling capacity. Using these results, new and improved web crippling design equations were proposed in this paper for LCBs under one-flange load cases. They include both unified web crippling equations and the direct strength method–based equations. This paper demonstrated the improved accuracy of the proposed equations and their potential for inclusion in the cold-formed steel design standards.

Item Type: Article
Uncontrolled Keywords: Cold-formed steel, Webs (structure), Finite element method, Numerical analysis, Web beams, Load and resistance factor design, Load tests, Numerical models, Load factors
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 18 Sep 2019 14:57
Last Modified: 10 Oct 2019 14:49
URI: http://nrl.northumbria.ac.uk/id/eprint/40730

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