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Influence of boundary conditions and geometric imperfections on lateral–torsional buckling resistance of a pultruded FRP I-beam by FEA
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Nguyen, T. T., Chan, Tak-Ming and Mottram, J. Toby (2013) Influence of boundary conditions and geometric imperfections on lateral–torsional buckling resistance of a pultruded FRP I-beam by FEA. Composite Structures, 100 . pp. 233-242. doi:10.1016/j.compstruct.2012.12.023
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WRAP_Mottram_TTN-TMC-JTM -LTB of pultruded FRP I Beam Final.pdf - Accepted Version Download (930Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.compstruct.2012.12.023
Abstract
Presented are results from geometric non-linear finite element analyses to examine the lateral torsional buckling (LTB) resistance of a Pultruded fibre reinforced polymer (FRP) I-beam when initial geometric imperfections associated with the LTB mode shape are introduced. A data reduction method is proposed to define the limiting buckling load and the method is used to present strength results for a range of beam slendernesses and geometric imperfections. Prior to reporting on these non-linear analyses, Eigenvalue FE analyses are used to establish the influence on resistance of changing load height or displacement boundary conditions. By comparing predictions for the beam with either FRP or steel elastic constants it is found that the former has a relatively larger effect on buckling strength with changes in load height and end warping fixity. The developed finite element modelling methodology will enable parametric studies to be performed for the development of closed form formulae that will be reliable for the design of FRP beams against LTB failure.
| Item Type: | Journal Article | ||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
| Divisions: | Faculty of Science > Engineering | ||||
| Library of Congress Subject Headings (LCSH): | Structural stability, Buckling (Mechanics), Safety factor in engineering, Polymeric composites, Fibrous composites, Reinforced plastics | ||||
| Journal or Publication Title: | Composite Structures | ||||
| Publisher: | Elsevier Ltd | ||||
| ISSN: | 0263-8223 | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Volume: | 100 | ||||
| Page Range: | pp. 233-242 | ||||
| DOI: | 10.1016/j.compstruct.2012.12.023 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | University of Warwick, Vietnam International Education Development (VIED) |
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