Poulton, M;
Sebastian, WM;
(2022)
Characterisation of local damage in pultruded GFRP road bridge decks with random fibre mat misalignments.
Composites Part A: Applied Science and Manufacturing
, 152
, Article 106673. 10.1016/j.compositesa.2021.106673.
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Abstract
The extent to which random, manufacturing-induced fibre mat misalignments compromise the structural integrity of pultruded GFRP road bridge decks is not fully understood. The problem is often critical at the web-flange junctions, which frequently contain the most severe misalignments and are subjected to high moment-shear (M−V) combinations due to local tyre load effects. To that end, in the presently reported experimental study, determinate M−V combinations were applied at the junctions of a pultruded GFRP bridge deck, without artificially restraining (e.g. by clamping, which spuriously strengthens) these junctions. For any given M−V ratio, significant scatter was observed in the damage patterns and loads up to ultimate, owing to random fibre mat misalignments which have been digitally documented in a previous paper. Damage occurred mostly within the junctions, and sometimes in the adjoining flanges. Relative to misalignment-free specimens, the first fracture moments dropped by 19% and 21% for junctions containing flip and wrinkle misalignments respectively. 19% of tests showed higher tangent stiffnesses after damage, probably due to beneficial changes in load-carrying mechanism. A three-pronged approach, based on the load-response, acoustic emission and video data, enables the definition of damage indices, thereby paving the way for integrity assessment of pultruded decks under local tyre load effects.
| Type: | Article |
|---|---|
| Title: | Characterisation of local damage in pultruded GFRP road bridge decks with random fibre mat misalignments |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.compositesa.2021.106673 |
| Publisher version: | https://doi.org/10.1016/j.compositesa.2021.106673 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Glass fibres; Fabrics/textiles; Defects; Pultrusion; Acoustic Emmision |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10137363 |
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