Flexural Analysis of Reinforced Concrete Beams Containing Steel Fibers
Publication: Journal of Structural Engineering
Volume 118, Issue 10
Abstract
The flexural behavior of reinforced concrete beams containing steel fibers is investigated in the present study. An experimental program was set up and nine reinforced concrete beams have been tested, including two series of singly reinforced concrete beams and one series of doubly reinforced concrete beams. The fiber contents of reinforced concrete beams for each series were 0%, 1%, and 2% by volume. The load was applied in four‐point flexural loading condition. The deflections and the steel and concrete strains were automatically measured at the various locations. The crack widths and crack spacings at each loading step were observed during the loading process. It was found from these measurements that the crack widths increase almost linearly with the increase of steel stress and the crack widths at the same loading stages are greatly reduced as the content of steel fibers increases. The present study also indicates that the ductility and the ultimate resistance are remarkably enhanced due to the addition of steel fibers. The design implication of fiber‐reinforced concrete beams is also discussed. A method for incorporating fiber effects in the flexural analysis of singly reinforced concrete beams is redrived, slightly modified and used to analyze the singly reinforced concrete beams. A new method to analyze doubly reinforced concrete beams containing steel fibers is derived and proposed for future use. It was found from this study that the neglect of fiber contribution may considerably underestimate the flexural capacity of fiber‐reinforced concrete beams. The present study allows more realistic analysis and design of reinforced concrete beams containing steel fibers.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Cox, H. L., (1952). “The elasticity and strength of paper and other fibrous materials.” British J. Appl. Phys., 3, 72–79.
2.
Craig, R. (1987). “Flexural behavior and design of reinforced fiber concrete members.” ACI SP105, American Concr. Inst., 517–563.
3.
“Design considerations for steel fiber reinforced concrete.” (1988). ACI Struct. J., 85(5), 563–580.
4.
Henager, C. H., and Doherty, T. J. (1976). “Analysis of reinforced fibrous concrete beams.” J. Struct. Engrg., ASCE, 102(1), 178–188.
5.
Jindal, R., and Sharma, V. (1987). “Behavior of steel fiber reinforced concrete knee‐type beam‐column connections.” ACI SP105, 475–491.
6.
Kormeling, H. A., Reinhardt, H. W., and Shah, S. P., (1980). “Static and fatigue properties of concrete beams reinforced with continuous bars and with fibers.” ACI J., 77(6), 36–43.
7.
Niyogi, S. K., and Dwarakanathan, G. I. (1985). “Fiber reinforced beams under moment and shear.” J. Struct. Engrg., ASCE, 111(3), 516–527.
8.
Ramakrishnan, V., Coyle, W. V., Kulandaisamy, V., and Schrader, E. K. (1981). “Performance characteristics of fiber reinforced concretes with low fiber contents.” ACI J., 78(5), 388–394.
9.
Romualdi, J. P., and Baston, G. B. (1963). “Mechanics of crack arrest in concrete.” J. Engrg. Mech., ASCE, 89(3), 147–168.
10.
Romualdi, J. P., and Mandel, J. A. (1964). “Tensile strength of concrete affected by uniformly distributed and closely spaced short lengths of wire reinforcement.” ACI, 61(6), 657–670.
11.
Shah, S. P., and Rangan, B. V., (1971). “Fiber reinforced concrete properties.” ACI J., 68 (2), 126–135.
12.
Sood, V., and Gupta, S. (1987). “Behavior of steel fibrous concrete beam‐column connections.” ACI, SP105, 437–474.
13.
Swamy, R. N., and Al‐Ta'an, S. A. (1981). “Deformation and ultimate strength in flexure of reinforced concrete beams made with steel fiber concrete.” ACI J., 78(5), 395–405.
14.
Swamy, R. N., and Bahia, H. M. (1985). “The effectiveness of steel fibers as shear reinforcement.” Concr. Int., ACI, 7(3), 35–40.
15.
Swamy, R. N., Manget, P. S., and Rao, C. V. S. K. (1987). “The mechanics of fiber reinforcement of cement matrices.” ACI, SP105‐28, 517–563.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 118 • Issue 10 • October 1992
Pages: 2821 - 2835
Copyright
Copyright © 1992 ASCE.
History
Published online: Oct 1, 1992
Published in print: Oct 1992
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.