Neutral Axis Depth versus Flexural Ductility in High-Strength Concrete Beams
Publication: Journal of Structural Engineering
Volume 130, Issue 3
Abstract
This paper presents an experimental study on the evolution of the neutral axis’s depth failure with the ductility at bending on high-strength concrete beams. Nineteen simply supported beams were tested and analyzed. Each beam was loaded by two symmetrical concentrated loads applied approximately at the span’s thirds. The concrete strength and the longitudinal tensile reinforcement ratio vary from beam to beam. As far as the ductility is concerned, ductility indexes were defined in order to characterize such property. The ductility’s influence on the value of the neutral axis’ depth at failure is analyzed and discussed. From the experimental program, the neutral axis’ depth at failure in high-strength concrete beams seams to be a valuable parameter to preview the beam ductility. Therefore, the practical rule of limiting the neutral axis’ depth of the critical sections presented by some codes of practice for normal strength concrete can be extended to high-strength concrete.
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References
American Concrete Institute (ACI). (1989). “Building code requirements for reinforced concrete.” ACI 318-89 and “Commentary.” ACI 318R-89, Detroit.
Ahmad, S. H., and Barker, R.(1991). “Flexural behavior of reinforced high-strength lightweight concrete beams.” ACI Struct. J., 88(1), 69–77.
Hansen, E. A., and Tomaszewicz, A. (1990). “Effect of confinement on the ductility of structural members with high-strength concrete.” SINTEF Rep. No. STF65 F90071, Trondheim, 184–191.
Lambotte, H., and Taerwe, L. R. (1990). “Deflection and cracking of high-strength concrete beams and slabs.” SP 121-7, Proc. High-Strength Concrete, 2nd Int. Symp., Berkeley, Calif., W. T. Hester, ed., ACI, Farmington Hills, Mich., 108–128.
Leslie, K. E., Rajagopalan, K. S., and Everard, N. J.(1976). “Flexural behavior of high-strength concrete beams.” ACI J., 73(9), 517–521.
Naaman, A. E., Harajli, M. H., and Wight, J. K.(1986). “Analysis of ductility in partially prestressed concrete flexural members.” PCI J., 31(3), 64–87.
Pastor, J. A., Nilson, A. H., and Slate, F. O. (1984). “Behavior of high-strength concrete beams.” Research Rep. No. 84-3, Dept. of Structural Eng., Cornell Univ., Ithaca, N.Y.
Shah, S. P., and Ahmad, S. H. (1994). High performance concretes and applications, Arnold, London.
Shehata, I. A. E. M., and Shehata, L. C. D. (1996). “Ductility of high-strength concrete beams in flexure.” Proc., 4th Int. Symp. on Utilization of High-Strength/High-Performance Concrete, Paris, 945–953.
Shin, S.-W. (1986). “Flexural behavior including ductility of ultra-high-strength concrete members.” PhD thesis, Univ. of Illinois at Chicago, Chicago.
Shin, S.-W., Ghosh, S. K., and Moreno, J.(1989). “Flexural ductility of ultra-high-strength concrete members.” ACI J., Proc.,86(4), 394–400.
Shin, S.-W., Kamara, M., and Ghosh, S. K. (1990). “Flexural ductility, strength prediction, and hysteretic behavior of ultra-high-strength concrete members.” SP 121-13, Proc., High-Strength Concrete, 2nd Int. Symp., Berkeley, Calif., W. T. Hester, ed., ACI, Farmington Hills, Mich.
Tognon, G., Ursella, P., and Coppeti, G.(1980). “Design and properties of concretes with strength over 1500 kgf/cm2.” ACI J., 77(3), 171–178.
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Copyright © 2004 American Society of Civil Engineers.
History
Received: Jun 11, 2002
Accepted: May 8, 2003
Published online: Feb 19, 2004
Published in print: Mar 2004
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