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Title: Pultruded GFRP beams : an evaluation of the Expanded Web Beam concept
Author: Hulland, Meg
ISNI:       0000 0004 2720 9146
Awarding Body: Lancaster University
Current Institution: Lancaster University
Date of Award: 2010
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This thesis presents the work completed on the evaluation of the expanded web beam concept. The research focussed on investigating methods for expanding the web of a standard pultruded GFRP I-beam to achieve improved mechanical performance whilst achieving an overall saving on mass. The 14 (102 x 102 x 6.4mm) beam was chosen as the standard beam from which the beams were constructed and the mechanical performance of the larger 18 (203 x 203 x 9.5mm) beam as the target for the modified beams. Three designs were proposed and two full-scale beams were built and tested. Of the three designs proposed, one used Quickstep manufactured sandwich panels and another metal connectors fabricated by a Selective Laser Melting facility. All the designs were analysed using theoretical closed form solutions and ANSYS FE software. A tension coupon testing programme was carried out in support of these analyses. The two full-scale beams were tested, together with an 18 beam, in three-point bending and lateral-torsional buckling. The slender nature of the expanded web beams meant that lateral bracing was required for the lateral buckling testing. Of the two modified beams the one that performed the best achieved, 85% of the deflection limit load and 71% of the lateral- torsional buckling load of the 18 beam for an overall mass saving of 38%.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available