Flexural strength and behaviour of cold rolled purlins with complex longitudinal stiffeners
Conference paper
Nguyen, V. B., Hajirasouliha, I. and English, M. 2025. Flexural strength and behaviour of cold rolled purlins with complex longitudinal stiffeners. IABSE Symposium 2025. Tokyo, Japan 18 - 21 May 2025 The International Association for Bridge and Structural Engineering (IABSE) .
| Authors | Nguyen, V. B., Hajirasouliha, I. and English, M. |
|---|---|
| Type | Conference paper |
| Abstract | This paper presents the flexural strength and behaviour of cold rolled channel and zed steel purlins with complex longitudinal web and flange stiffeners. The material properties at the section’s flat parts, corners, and stiffeners are obtained from tensile tests. A series of four-point beam bending tests is carried out to determine the buckling and ultimate bending capacities of these sections. Nonlinear Finite Element analysis (FEA) is developed to model the flexural strength of the purlins and validated against the experimental tests. True stress-strain data for materials due to cold working at different regions of the sections are incorporated into nonlinear analyses. Based on the validated FEA results for different sectional shapes and thicknesses, design formulae for determining flexural strength of purlin sections with complex stiffeners are developed. |
| Keywords | Cold rolled sections; purlins; cold working; channel section; zed section; buckling; ultimate strength; tensile test; four-point bending test; Finite Element analysis |
| Year | 2025 |
| Conference | IABSE Symposium 2025 |
| Journal | Structural Engineering International (SEI) |
| Publisher | The International Association for Bridge and Structural Engineering (IABSE) |
| Web address (URL) | https://www.iabse.org/Tokyo2025 |
| Accepted author manuscript | License File Access Level Open |
| Publisher's version | File Access Level Restricted |
| Web address (URL) of conference proceedings | https://www.iabse.org/Publications |
| Publication dates | |
| Online | 23 May 2025 |
| Publication process dates | |
| Accepted | 23 May 2025 |
| Deposited | 24 Jul 2025 |
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Accepted author manuscript
| IABSE Tokyo 2025 - Full Paper Template - VBN - REVISED.pdf | ||
| License: CC BY-NC-ND 4.0 | ||
| File access level: Open | ||
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