Effect of Shear Studs and High Moments on Punching Behavior of GFRP-RC Slab–Column Edge Connections
Publication: Journal of Composites for Construction
Volume 20, Issue 4
Abstract
This paper presents test results of six full-scale glass fiber-reinforced polymer (GFRP) reinforced concrete slab–column edge connections. The test connections included two series with three connections each. The connections of Series 1 investigated the effect of a new type of GFRP shear reinforcement on the punching shear behavior of slab-column edge connections, while those of Series 2 investigated the effect of moment-to-shear ratio. For Series 1, one connection did not have shear reinforcement, while the other two connections had ribbed-deformed GFRP shear studs with headed ends at different radial spacing (120 and 80 mm). For Series 2, three different moment-to-shear ratios were applied to the connections (0.2, 0.4, and 0.6 m). The typical dimensions of the slabs were with a 300-mm square column extending above and below the slab. The headed ends of the studs provided adequate anchorage, which allowed the studs to control the propagation of shear cracks and to increase the deformability and capacity of the connections. On the other hand, increasing the moment-to-shear ratio significantly decreased the deformability and shear force capacity of the connections.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors wish to express their sincere gratitude for the financial support received from the Natural Sciences and Engineering Council of Canada (NSERC) through Discovery and Canada Research Chairs (CRC) Program. The GFRP ComBAR reinforcement generously provided by Schoeck Canada Inc. is greatly appreciated. Also, the assistance received from the technical staff of the McQuade Structures Laboratory at the University of Manitoba is acknowledged.
References
ACI (American Concrete Institute). (2014). “Building code requirements for structural concrete and commentary.” ACI 318-14, Farmington Hills, MI.
ACI (American Concrete Institute). (2015). “Guide for the design and construction of structural concrete reinforced with fiber-reinforced polymer (FRP) bars.” ACI 440.1R-15, Farmington Hills, MI.
ASTM. (2011). “Standard test method for tensile properties of fiber reinforced polymer matrix composite bars.” ASTM D7205/D7205M, West Conshohocken, PA.
Corley, W., and Hawkins, N. (1968). “Shearhead reinforcement for slabs.” ACI Struct. J., 65(10), 811–824.
CSA (Canadian Standards Association). (2009). “Test methods and standard practices for concrete.” CAN/CSA A23.2-09 (R2014), Toronto.
CSA (Canadian Standards Association). (2012). “Design and construction of building structures with fibre-reinforced polymers.” CAN/CSA S806-12, Toronto.
CSA (Canadian Standards Association). (2014). “Design of concrete structures.” CAN/CSA-A23.3-14, Toronto.
Dilger, W., and Ghali, A. (1981). “Shear reinforcement for concrete slabs.” J. Struct. Div., 107(12), 2403–2420.
Dilger, W., and Shatila, M. (1989). “Shear strength of prestressed concrete edge slab-column connections with and without shear stud reinforcement.” Can. J. Civ. Eng., 16(6), 807–819.
Elgabry, A., and Ghali, A. (1987). “Tests on concrete slab-column connections with stud-shear reinforcement subjected to shear-moment transfer.” ACI Struct. J., 84(5), 433–442.
El-Ghandour, A., Pilakoutas, K., and Waldron, P. (2003). “Punching shear behavior of fiber reinforced polymers reinforced concrete flat slabs: Experimental study.” J. Compos. Constr., 258–265.
El-Salakawy, E., Polak, M., and Soliman, M. (2000). “Reinforced concrete slab-column edge connections with shear studs.” Can. J. Civ. Eng., 27(2), 338–348.
Gar, S., Mander, J., Head, M., and Hurlebaus, S. (2014). “FRP slab capacity using yield line theory.” J. Compos. Constr., 04014021.
Hassan, M., Ahmed, E., and Benmokrane, B. (2015). “Punching shear behavior of two-way slabs reinforced with FRP shear reinforcement.” J. Compos. Constr., 04014030.
Heinzmann, D., Etter, S., Villiger, S., and Jaeger, T. (2012). “Punching tests on reinforced concrete slabs with and without shear reinforcement.” ACI Struct. J., 109(6), 787–794.
ISIS Canada. (2001). “Reinforcing concrete structures with fibre reinforced polymers.” Intelligent Sensing for Innovative Structures Canada, Winnipeg, MB, Canada.
Langohr, P., Ghali, A., and Dilger, W. (1976). “Special shear reinforcement for concrete flat plates.” ACI Struct. J., 73(3), 141–146.
Marzouk, H., Emam, M., and Hilal, M. (1996). “Effect of high-strength concrete columns on the behavior of slab-column connections.” ACI Struct. J., 93(5), 545–552.
Mokhtar, A., Ghali, A., and Dilger, W. (1985). “Stud shear reinforcement for flat concrete plates.” ACI J., 82(5), 676–683.
Mortin, J., and Ghali, A. (1991). “Connection of flat plates to edge columns.” ACI Struct. J., 88(2), 191–198.
Ospina, C., Alexander, S., and Cheng, J. (2003). “Punching of two-way concrete slabs with fiber-reinforced polymer reinforcing bars or grids.” ACI Struct. J., 100(5), 589–598.
Park, R., and Gamble, W. (1980). Reinforced concrete slabs, Wiley, New York.
Park, R., and Paulay, T. (1975). Reinforced concrete structures, Wiley, Hoboken, NJ.
Polak, M., El-Salakawy, E., and Hammill, N. (2005). “Shear reinforcement for concrete flat slabs.” ACI SP, 232(5), 75–96.
Ritchie, M., and Ghali, A. (2005). “Seismic-resistant connections of edge columns with prestressed slabs.” ACI Struct. J., 102(2), 314–323.
Schöck Canada. (2013). “Schöck ComBAR™—Technical information.” 〈http://www.schoeck.ca/en_ca/downloads?product=4&type=7&filter=1〉 (Oct. 2013).
Stein, T., Ghali, A., and Dilger, W. (2007). “Distinction between punching and flexural failure modes of flat plates.” ACI Struct. J., 104(3), 357–365.
Voet, A., Dilger, W., and Ghali, A. (1982). “Concrete flat plates with well-anchored shear reinforcement elements.” Can. J. Civ. Eng., 9(1), 107–114.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 20 • Issue 4 • August 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 14, 2015
Accepted: Nov 5, 2015
Published online: Jan 11, 2016
Discussion open until: Jun 11, 2016
Published in print: Aug 1, 2016
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.