Eccentrically Loaded Concrete under Nonuniform Passive Confinement
Publication: Journal of Structural Engineering
Volume 148, Issue 1
Abstract
There is no doubt that the strength and ductility of concrete structures can be enhanced significantly by lateral confining with steel or fiber reinforced polymer (FRP). Nevertheless, studying the mechanical response of eccentrically loaded confined concrete has received little attention compared to the study of a concentrically loaded concrete structure. To achieve a better fundamental understanding of the mechanical behavior of eccentrically loaded concrete under nonuniform confinement, an experimental study with analytical modeling was conducted in this work. A total of 100 concrete cubic specimens were tested with eccentric loadings and various lateral confinements from a fabricated apparatus that can simulate and generate passive confining pressure. Furthermore, this study successfully extended a well-established stress-strain model, originally proposed for eccentrically loaded FRP-confined circular concrete columns, to nonuniformly confined concrete cubes. The applicability and modification of this eccentricity-based model are verified and developed with the test results in this work. This paper concluded that there is good accuracy and agreement between the theoretical predictions and test results.
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Data Availability Statement
All data and models used during the study appear in the published article.
Acknowledgments
The authors would like to acknowledge the financial support from the Research Grants Council of the Hong Kong Special Administrative Region (Project Nos. CityU 11212017, 11216318), Australian Research Council (DE210101662, DP200100631), and the Hong Kong PhD Fellowship Scheme (HKPFS) awarded to the first author throughout his PhD candidature. The authors also wish to thank Dr. Mohsen Mohammadi for his technical advice.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 1 • January 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Aug 22, 2020
Accepted: Aug 9, 2021
Published online: Oct 29, 2021
Published in print: Jan 1, 2022
Discussion open until: Mar 29, 2022
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