Influence of Steel Fibers and Headed Bars on the Serviceability of High-Strength Concrete Corbels
Publication: Journal of Structural Engineering
Volume 138, Issue 1
Abstract
Vertical loading tests are reported for six double-sided, high-strength concrete corbel specimens. The primary variables of the investigation were the percentage of steel fibers and the anchorage method of the main tension tie. The test results indicated that performance in terms of load-carrying capacities, stiffness, ductility, and crack width was improved, as the steel fibers were added and the percentage of steel fibers was increased. The corbel specimens with headed bars used as the main tension-tie reinforcement showed superior load-carrying capacities, stiffness, and ductility compared with the corbel specimens in which the main tension ties were anchored by welding to the transverse bars. From the test results, it is expected that the load-carrying capacities, serviceability, and durability of high-strength concrete corbels would be improved by using steel fibers and headed bars. Experimental results presented were also compared with various prediction models.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The work presented in this paper was funded by the Center for Concrete Corea (UNSPECIFIED05-CCT-D11), supported by the Korea Institute of Construction and Transportation Technology Evaluation and Planning (KICTTEP) under the Ministry of Construction and Transportation (MOCT). The friction-welded headed bars were provided by Headed Reinforcement Corp. (HRC). The testing was carried out in the structural laboratories in the Department of Civil Engineering at McGill University.
References
American Concrete Institute (ACI). (2008). “Building code requirements for structural concrete and commentary.” ACI 318-08 and ACI 318M-08, Farmington Hill, MI.
Campione, G., La Mendola, L., and Mangiavillano, M. L. (2007). “Steel fiber-reinforced concrete corbels: Experimental behavior and shear strength prediction.” ACI Struct. J., 104(5), 570–579.
Canadian Standards Association (CSA). (2004). “Design of concrete structures.” CSA A23.3-04, Mississauga, ON, Canada.
Fattuhi, N. I. (1990). “Strength of SFRC corbels subjected to vertical load.” J. Struct. Eng., 116(3), 701–718.
Fattuhi, N. I. (1994). “Strength of FRC corbels in flexure.” J. Struct. Eng., 120(2), 360–377.
Foster, S. J., Powell, R. E., and Selim, H. S. (1996). “Performance of high-strength concrete corbels.” ACI Struct. J., 93(5), 555–563.
Hwang, S. J., Lu, W. Y., and Lee, H. J. (2000). “Shear strength prediction for reinforced concrete corbels.” ACI Struct. J., 97(4), 543–552.
Mitchell, D., Cook, W. D., Alameer, M., and Fu, Z. (2005). “Strategic use of fibers for improved structural performance.” Proc. 3rd Int. Conf. on Construction Materials—Performance, Innovations and Structural Implications, CONMAT’05 (CD-ROM), University of British Columbia, Vancouver, Canada.
Mitchell, D., Cook, W. D., Uribe, C. M., and Alcocer, S. M. (2002). “Experimental verification of strut-and-tie models.” Examples for the design of structural concrete with strut-and-tie models, ACI SP-208, Farmington Hill, MI, 41–62.
Morgan, D. R., Mindess, S., and Chen, L. (1995). “Testing and specifying toughness for fiber reinforced concrete and shotcrete.” Proc., 2nd University—Industry Workshop on Fiber-Reinforced Concrete and Other Advanced Composites—Fiber-Reinforced Concrete—Modern Developments, N. Banthia and S. Mindess, eds., University of British Columbia, Vancouver, Canada, 29–50.
Russo, G., Venir, R., Pauletta, M., and Somma, G. (2006). “Reinforced concrete corbels—Shear strength model and design formula.” ACI Struct. J., 103(1), 3–10.
Solanki, H., and Sabnis, G. M. (1987). “Reinforced concrete corbels—Simplified.” ACI Struct. J., 84(5), 428–432.
Yong, Y. K., and Balaguru, P. (1994). “Behavior of reinforced high-strength-concrete corbels.” J. Struct. Eng., 120(4), 1182–1201.
Information & Authors
Information
Published In
Copyright
© 2012 American Society of Civil Engineers.
History
Received: May 25, 2009
Accepted: Apr 18, 2011
Published online: Dec 15, 2011
Published in print: Jan 1, 2012
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.