Load Path Effect on the Response of Slender Lightly Reinforced Square RC Columns under Biaxial Bending
Publication: Journal of Structural Engineering
Volume 148, Issue 3
Abstract
This paper presents an experimental investigation of the effect of load path on force-displacement response, damage patterns, and failure modes of slender lightly reinforced concrete (RC) columns. A review of available experimental tests, which include columns subjected to multiaxial loading protocols, is first presented. Next, a new experimental campaign on 18 column specimens tested under constant axial load and lateral displacement-controlled load paths is described. The results of the tests performed confirm that the response under biaxial load paths is qualitatively and quantitatively different from that observed for uniaxial load paths. The first and foremost qualitative difference is that the damage mechanisms change and the failure mode can change as a result. This, in turn, leads to quantitative differences in ultimate and collapse deformation, and therefore ductility and hysteretic dissipation capacity.
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Data Availability Statement
All data generated in this experimental campaign are available at the repository of the Faculty of Engineering of the University of Porto URL: http://lese.fe.up.pt/load_path_effect_RCcolumns/dataset.zip [DOI 10.13140/RG.2.2.17191.57762].
Acknowledgments
This paper reports research developed under financial support provided by Fundação para a Ciência e Tecnologia (FCT), Portugal, cofunded by the European Social Fund, namely through the postdoctoral fellowship of José Melo, with reference SFRH/BPD/115352/2016; and by Base Funding UIDB/04708/2020 and Programmatic Funding UIDP/04708/2020 of the CONSTRUCT–Instituto de I&D em Estruturas e Construções, funded by national funds through the FCT/MCTES (PIDDAC). Paolo Franchin and Andrea Lucchini gratefully acknowledge funding for this study from University of Rome La Sapienza.
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Journal of Structural Engineering
Volume 148 • Issue 3 • March 2022
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© 2021 American Society of Civil Engineers.
History
Received: Dec 14, 2020
Accepted: Sep 7, 2021
Published online: Dec 16, 2021
Published in print: Mar 1, 2022
Discussion open until: May 16, 2022
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