CFRP-reinforced circular steel tubes with cutout under axial loading

This paper experimentally and numerically investigates the effect of strengthening circular steel tubes with cutout using Carbon Fibre Reinforced Polymer (CFRP) under compression. Tests were performed for unstrengthened and strengthened specimens and the results were compared to the numerical data....

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Bibliographic Details
Published inJournal of constructional steel research Vol. 164; p. 105775
Main Authors Nabati, Amin, Ghanbari-Ghazijahani, Tohid
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2020
Subjects
Axial compression
CFRP
Circular steel tubes
Cutout
FEA
Tests
FEA
Axial compression
CFRP
Tests
Cutout
Circular steel tubes
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Summary:This paper experimentally and numerically investigates the effect of strengthening circular steel tubes with cutout using Carbon Fibre Reinforced Polymer (CFRP) under compression. Tests were performed for unstrengthened and strengthened specimens and the results were compared to the numerical data. The numerical study was then extended through designing nine strengthening layouts with various CFRP layers and orientations and the results were compared aiming to find optimal solutions in remediation of the capacity. It was found that utilising CFRP in certain locations with specific dimensions and layers transfers the stress concentration from critical areas, hence remedies the lost capacity resulted from the presence of the cutout. •The novelty of the paper lies in the optimised usage of CFRP to restrain/delay the local bucking.•CFRP had a significant effect on redistributing stresses and directing critical stresses to the areas with lower stresses.•CFRP is a corrosion-free and easy-to-install solution to reinforce the cutout area.
ISSN:0143-974X
1873-5983
DOI:10.1016/j.jcsr.2019.105775