Experimental and Analytical Reexamination of Classic Concrete Beam Tests
Publication: Journal of Structural Engineering
Volume 130, Issue 3
Abstract
The classic series of beam tests conducted by Bresler and Scordelis some 40 years ago to investigate the behavior of reinforced concrete in shear, is commonly regarded as a benchmark against which finite element analysis models can be calibrated. A nominally identical set of beams was recently tested at the University of Toronto. Aspects of behavior of the original and duplicate beams are compared and discussed, including load–deformation response, load capacity, and failure mode. Generally, it was found that most aspects of behavior were well replicated. Test observations reveal that the behavior of the beams is highly influenced by crushing of concrete beneath and adjacent to the loading plates. In the case of the beams containing no shear reinforcement, failure was influenced by the reinforcement anchorage plates. The disturbances around the loading plates and anchor plates introduce complex three-dimensional effects, making the modeling of these beams using two-dimensional finite element techniques difficult. However, accuracy is substantially improved if out-of-plane confinement effects are considered. In addition to some insights on the behavior of the original beams, and on factors that should be considered in their finite element modeling, the duplicate tests also provide information on postpeak behavior.
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References
ASCE. (1982). “Finite element analysis of reinforced concrete.” State-of-the-Art Rep. No. ISBN 0-87262-307-6, 545 pp.
Bresler, B., and Scordelis, A. C.(1963). “Shear strength of reinforced concrete beams.” J. Am. Concr. Inst., 60(1), 51–72.
Vecchio, F. J.(2000). “Disturbed stress field model for reinforced concrete: Formulation.” J. Struct. Eng., 126(9), 1070–1077.
Vecchio, F. J.(2001). “Disturbed stress field model for reinforced concrete: Implementation.” J. Struct. Eng., 127(1), 12–20.
Vecchio, F. J., and Collins, M. P.(1986). “The modified compression field theory for reinforced concrete elements subjected to shear.” J. Am. Concr. Inst., 83(2), 219–231.
Willam, K., and Tanabe, T. (2001). “Finite element analysis of reinforced concrete structures.” ACI Special Publ. No. SP-205, 399 pp.
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Copyright © 2004 American Society of Civil Engineers.
History
Received: Jun 27, 2002
Accepted: Mar 24, 2003
Published online: Feb 19, 2004
Published in print: Mar 2004
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