Moment-rotation response of nominally pinned beam-to-column joints for frames of pultruded fibre reinforced polymer

Article


Qureshi, J. and Mottram, J. Toby 2015. Moment-rotation response of nominally pinned beam-to-column joints for frames of pultruded fibre reinforced polymer. Construction and Building Materials. 77 (Feb.), pp. 396-403.
AuthorsQureshi, J. and Mottram, J. Toby
Abstract

This paper presents the test results to characterise the moment-rotation response of nominally pinned joints in frames of pultruded shapes. Mimicking conventional steel construction the major-axis beam-to-column joints are formed using pultruded FRP web cleats having steel bolting. There are two joint configurations with either a single row of three or two bolts per cleat leg. Testing is conducted on nominally identical specimens to statistically quantify the key joint properties. The average stiffness of all joints at damage onset is found to be 50% more variable than the average moment resistance. The presence of 70% difference between the minimum and maximum initial stiffness measured makes a single specimen measurement for stiffness unsuitable for frame analysis. The initial stiffness of the two joint configurations classifies them to be nominally pinned. No appreciable difference in characteristics for the three and two bolt configurations is found; the middle-bolt is unnecessary as two bolts give same results. The most important finding is that delamination cracks, at the top of the FRP cleats, could initiate before the mid-span vertical deflection of a simply supported beam with uniformly distributed load exceeds span/340.

KeywordsSimple pultruded frames; Web cleats; Beam-to-column bolted joints; Moment-rotation characteristics; Damage onset
JournalConstruction and Building Materials
Journal citation77 (Feb.), pp. 396-403
ISSN0950-0618
Year2015
PublisherElsevier
Publisher's version
License
CC BY
Digital Object Identifier (DOI)doi:10.1016/j.conbuildmat.2014.12.057
Publication dates
Print12 Jan 2015
Publication process dates
Deposited27 Jan 2017
Accepted24 Dec 2014
FunderEngineering and Physical Sciences Research Council (EPSRC)
Access Design & Engineering (Telford, UK)
Engineering and Physical Sciences Research Council
Access Engineering and Design, Telford UK
Copyright information© 2015 Elsevier
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