Theoretical Shear Strength of Concrete Columns Due to Transverse Steel
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VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 131, Issue 1
Abstract
The effect of discrete distribution of transverse reinforcement for shear strength of reinforced concrete beams and columns is evaluated. In order to bridge the gap between the present code formulations based on the smeared distribution of transverse steel and the reality based on the discrete distribution, correction factors are proposed for rectangular and circular hoops and spirals. The correction factor for rectangular hoops is more significant than those for circular hoops and spirals. Poorly detailed members, where for rectangular hoops and for circular hoops and spirals, will have a capacity reduction factor that is less than the usual undercapacity factor of say 0.75, where of spaces between reinforcement hoops crossing a shear crack. In order to limit the unconservativeness to less than 10%, for rectangular hoops and for circular hoops and spirals should be used.
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References
American Concrete Institute (ACI). (2002). “Building code requirements for structural concrete and commentary.” ACI 318, Detroit.
Ang, B. G., Priestley, M. J. N., and Paulay, T. (1989). “Seismic shear strength of circular reinforced concrete columns.” ACI Struct. J. 86-S6, 45–59.
Dancygier, A. N. (2001). “Shear carried by transverse reinforcement in circular RC elements.” J. Struct. Eng., 127(1), 81–83.
Kim, J. H., and Mander, J. B. (2000). “Theoretical investigation of shear resistance of concrete circular columns due to transverse steel.” Proc., 6th Int. Conf. on Structural Failure, Durability and Retrofitting (ICSF 2000), Singapore Concrete Institute, Singapore, 219–226.
MacGregor, J. G. (1997). Reinforced concrete mechanics and design, 3rd Ed., International Edition, Prentice-Hall, Englewood Cliffs, N.J.
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© 2004 ASCE.
History
Received: Sep 9, 2002
Accepted: May 25, 2004
Published online: Jan 1, 2005
Published in print: Jan 2005
Notes
Note. Associate Editor: Dat Duthinh
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