Nguyen, T. T. (Tien Thuy) (2014) Lateral-torsional buckling resistance of pultruded fibre reinforced polymer shapes. PhD thesis, University of Warwick.

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Abstract

The currently lack of design guidance for pultruded fibre-reinforced polymer member requires more study on their structural behaviours in order to provide structural designer with confidence when applying this material into civil engineering. Elastic lateraltorsional buckling is an important global instability mode of failure for flexure about the major axis of open sections which is characterised by a coupled elastic deformation of lateral deflection and twist about beam’s longitudinal axis.

The key elements of this study are laboratory testing, finite element analysis and development of design guidance that is compatible with Eurocode 3 design procedure. 94 tests have been carried out on tensile coupons to characterise the four key material properties for longitudinal, transverse, shear moduli of elasticity and major Poission’s ratio that are required for the prediction of the buckling resistance using closed-form equations and by finite element analysis. 114 tests on the elastic lateral-torsional buckling of I and channel beams under various loading and displacement boundary conditions have been carried out to determine the buckling resistance. Finite element modelling methodology has been developed and both linear and nonlinear numerical analyses have been performed to show that the methodology is suitable. Further sensitivity analysis has been conducted to demonstrate that the buckling resistance is highly influenced by the combination of material, geometric and loading imperfection. A calibration has been implemented, based on the new test results, following the Eurocode 0’s approach to establish the material partial factor for the investigated instability mode of failure.

Item Type:	Thesis or Dissertation (PhD)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Library of Congress Subject Headings (LCSH):	Fibrous composites, Buckling (Mechanics)
Official Date:	May 2014
Dates:	Date Event May 2014 Submitted
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Chan, T. M. ; Mottram, J. Toby (James Toby), 1958-
Sponsors:	Vietnam. Bộ giáo dục và đào tạo [Ministry of Education and Training] ; University of Warwick. School of Engineering
Extent:	xxxvii, 275 leaves : illustrations, charts
Language:	eng

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