Cyclic Response of Bolted and Hybrid Pultruded FRP Beam-Column Joints between I-Shaped Sections

Article

Qureshi, J., Nadir, Y. and John, S. K. 2021. Cyclic Response of Bolted and Hybrid Pultruded FRP Beam-Column Joints between I-Shaped Sections. Fibers. 9 (Art. 66). https://doi.org/10.3390/fib9110066
AuthorsQureshi, J., Nadir, Y. and John, S. K.
Abstract

This paper presents cyclic behaviour of bolted and hybrid–combined bolted and bonded fibre re-inforced polymer (FRP) beam-to-column joints between I-shaped members using steel and FRP cleats. Five full-scale cyclic tests are carried out to study moment-rotation behaviour, cyclic re-sponse, and failure patterns. The test parameters include position of cleat (flange or combined web and flange), fastening method (bolting or hybrid–combining bolting and bonding) and cleat ma-terial (steel or FRP). First two tests had bolted and hybrid joints with steel flange and web double angles. Next two tests had the same joint detailing but with no web cleats. Last test used bolted joint only with FRP web and flange cleats. Three failure modes were observed: shear-out failure of the beam’s bolted zone, adhesive debonding with shear-out failure and delamination cracking. Cyclic performance of the joints was assessed by hysteresis moment-rotation curves and accumulated dissipated energy. Hybrid joints showed the best overall cyclic performance with accumulated dissipated energy about 75% higher than the bolted joints. Bolted joints with FRP cleats exhibited the worst cyclic performance. Flange cleated joints showed similar performance to web and flange cleated joints.

KeywordsFRP composite structures; cyclic testing; beam-to-column joints; bolting and adhesive bonding; moment-rotation behaviour
JournalFibers
Journal citation9 (Art. 66)
ISSN 2079-6439
Year2021
PublisherMDPI
Publisher's version
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Anyone
Digital Object Identifier (DOI)https://doi.org/10.3390/fib9110066
Publication dates
Online28 Oct 2021
Publication process dates
Accepted26 Oct 2021
Deposited19 Nov 2021
Copyright holder© 2021 The Authors
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