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Stability analysis for pitched portal frames of fibre reinforced polymer
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Mottram, J. Toby (2008) Stability analysis for pitched portal frames of fibre reinforced polymer. In: Fourth International Conference on FRP Composites in Civil Engineering (CICE2008), Zurich, Switzerland, Jul 22-24, 2008. Published in: Proceedings of the Fourth International Conference on FRP Composites in Civil Engineering (CICE2008) (Chapter 14). ISSN ISBN: 978-3-905594-50-8.
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Official URL: http://www.iifc-hq.org/proceedings/CICE_2008/html/...
Abstract
In this paper the analysis method from Majid (1963) for steel pitched portal frames is progressed so that we can study the influence of shearing action on the overall elastic
critical buckling load when members are of Fibre Reinforced Polymer (FRP) material. For solid members of FRP the ratio of the longitudinal Young’s modulus to the shear modulus of elasticity can be significantly higher than for the equivalent sized isotropic members, and so the influence of shear deformability on the buckling resistance is required. Shear-flexibility can also be introduced into skeleton frames by having FRP members that are of braced-batten or of sandwich construction. In the approach developed by Majid the buckling problem is modelled using stability functions that account for the reduced stiffness in beam-column members as deformation increases. To apply the closed-form expressions to frames with shear-flexible members requires the replacement of the shear-stiff stability functions with the shear-flexible equivalents. One set of expressions is from Mottram and Aberle (2002), after they observed an end rotational compatibility issue in the theoretical derivation to the conventional set of shear-flexible stability functions (see Al-Sarraf 1986). To show the influence of shear-flexibility, and the choice of
functions, analytical results for the critical load (for symmetrical and anti-symmetrical modes) are reported for two loading cases. A brief discussion is given on how these results impinge on our fundamental understanding of the instability resistance of pitched FRP portals in the presence of shear-flexibility. It is observed that further work is required to find out if the critical load is to be determined by analysis using the 2002 set of shear-flexible stability functions.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | Proceedings of the Fourth International Conference on FRP Composites in Civil Engineering (CICE2008) | ||||
Publisher: | International Institute for FRP in Construction | ||||
ISSN: | ISBN: 978-3-905594-50-8 | ||||
Official Date: | July 2008 | ||||
Dates: |
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Number: | Chapter 14 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | Fourth International Conference on FRP Composites in Civil Engineering (CICE2008) | ||||
Type of Event: | Conference | ||||
Location of Event: | Zurich, Switzerland | ||||
Date(s) of Event: | Jul 22-24, 2008 |
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