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Strength and Behaviour of Double-coped Steel Beams under Combined Loads Open Access


Other title
double copes
combined loads
coped beam
experimental tests
current design procedures
axial load
steel connections
Type of item
Degree grantor
University of Alberta
Author or creator
Johnston, Graeme G
Supervisor and department
Driver, Robert (Civil and Environmental Engineering)
Examining committee member and department
Cheng, Roger (Civil and Environmental Engineering)
Driver, Robert (Civil and Environmental Engineering)
Callele, Logan (N/A)
Cruz-Noguez, Carlos (Civil and Environmental Engineering)
Department of Civil and Environmental Engineering
Structural Engineering
Date accepted
Graduation date
Master of Science
Degree level
Current design procedures for double-coped beams tend to be overly conservative and do not include considerations for axial load. The reduced strength and stability of the coped region increase the susceptibility of the connection to a local failure, and the complexity of the connection behaviour is compounded if axial load is present in addition to shear. However, this behaviour is not well understood due to a lack of research. No published research exists on the full-scale physical testing of double-coped beams. To address these problems, an investigation into the strength and behaviour of double-coped beams was completed by testing 29 full-scale specimens. Test specimens varied in beam depth and cope length to represent geometries found in typical structures that may be susceptible to stability issues. The specimens were subjected to a combination of shear, as well as axial loads that varied from 100 kN in tension to 300 kN in compression, and were tested at reasonable upper and lower bounds for typical beam end rotations and end-support conditions. Critical failure modes of the double-coped beam tests are described and the effects of the test variables on the behaviour and strength of the connections are discussed. Based on the test results, four design procedures are assessed for their ability to predict the failure mode and capacity of the connections accurately. Conclusions are made on the strength, behaviour, and ductility of double-coped beams based on the tested variables.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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