Punching Shear Behavior of Externally Prestressed Concrete Slabs
This article has a reply.
VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 137, Issue 1
Abstract
The use of externally post-tensioned fiber-reinforced concrete decks in highway bridge structures is seen as a viable option in the move toward the design and construction of high-performance structures. However, with the thin unreinforced deck slabs that may result, punching shear is a potential concern. An experimental program is described in which the punching shear behavior of externally prestressed slabs is investigated, both with plain and fiber-reinforced concrete specimens. Results indicate that significant improvements in strength, ductility, energy absorption and nonbrittleness of failure can be achieved with fiber reinforcement. Nonlinear finite-element analysis procedures are used to model the specimens, and reasonably accurate simulations of behavior are obtained. Design code procedures are found to be unconservative in estimating the punching shear strength of these elements, whereas a commonly used analytical model is found to be overly conservative.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers gratefully acknowledge the financial support of the Cement Association of Canada and the Natural Sciences and Engineering Research Council of Canada. Specimen P-2a was constructed and tested by Mr. Jamie McIntyre as part of his Master’s thesis.
References
Aoki, Y., and Seki, H. (1974). “Shearing strength and cracking in two-way slabs subjected to concentrated load.” Cracking, Deflection, and Ultimate Load of Concrete Slab Systems. J. Am. Concr. Inst., 30, 103–126.
Foster, S. J., Voo, Y. L., and Chong, K. T. (2006). “FE Analysis of steel fibre reinforced concrete beams failing in shear: Variable engagement model.” ACI SP-237 Finite element analysis of reinforced concrete structures.
Hassan, A., Kawakami, M., Niitani, K., and Yoshioka, T. (2002). “Experimental investigation of steel-free deck slabs.” Can. J. Civ. Eng., 29(6), 831–841.
He, W. (1992). “Punching behaviour of composite bridge decks with transverse prestressing.” Ph.D. thesis, Queen’s Univ., Canada.
Hewitt, Brian E., and Batchelor, Barrington de V. (1975). “Punching shear strength of restrained slabs.” J. Struct. Div., 101(9), 1837–1853.
Kinnunen, S., and Nylander, H. (1960). “Punching of concrete slabs without shear reinforcement.” Transaction of the Royal Institute of Technology, Stockholm, Sweden, 158.
Mufti, A. A., Jaeger, L. G., Bakht, B., and Wagner, L. D. (1993). “Experimental investigation of fibre-reinforced concrete deck slabs without internal steel reinforcement.” Can. J. Civ. Eng., 20(3), 398–406.
Newhook, J. P. (1997). “Behaviour of steel-free concrete bridge deck slabs under static loading conditions.” Ph.D. thesis, Dalhousie Univ., Canada.
Shaaban, A. M., and Gesund, H. (1994). “Punching shear strength of steel fibre reinforced concrete flat plates.” ACI Struct. J., 91(4), 406–416.
Swamy, R. N., and Ali, S. A. R. (1982). “Punching shear behaviour of reinforced slab-column connections made with steel fibre concrete.” ACI J., 79(5), 392–406.
Taylor, R., and Hayes, B. (1965). “Some tests on the effect of edge restraint on punching shear in reinforced concrete slabs.” Mag. Concrete Res., 17(50), 39–44.
UNI-11039 (2003). Steel fibre reinforced concrete. Part I: Definitions, classification specification and conformity. Part II: Test method for measuring first crack strength and ductility indexes, UNI-Italian Organization for Standardization.
Vecchio, F. J. (2000). “Disturbed stress field model for reinforced concrete: Formulation.” J. Struct. Eng., 126(9), 1070–1077.
Vecchio, F. J., and Collins, M. P. (1986). “Modified compression field theory for reinforced concrete elements subjected to shear.” J. Am. Concr. Inst., 83(2), 219–231.
Wood, R. H. (1961). Plastic and elastic design of slabs and plates, Thames and Hudson, London, 253.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 1 • January 2011
Pages: 100 - 108
Copyright
© 2011 ASCE.
History
Received: May 31, 2010
Accepted: Jul 10, 2010
Published online: Dec 15, 2010
Published in print: Jan 2011
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.