Title:
Shear-Resisting Performance of Reinforced Concrete Flat Plates with Different Headed Stud Layouts
Author(s):
Gabriel E. Polo, Oguzhan Bayrak, and Trevor D. Hrynyk
Publication:
Structural Journal
Volume:
118
Issue:
1
Appears on pages(s):
5-16
Keywords:
flat plates; punching shear; shear reinforcement; shear studs
DOI:
10.14359/51728087
Date:
1/1/2021
Abstract:
The use of headed stud shear reinforcement has been widely accepted as an effective strategy to improve the punching shear resisting performance of reinforced concrete (RC) flat plates. However, the specific placement and layout of the shear studs provided in flat plates tends to vary throughout the world, and questions have been raised regarding the performance of the different shear stud layouts employed. This paper presents the results obtained from six large-scale flat-plate slab-column connection specimens that were tested under concentric shear loading conditions. The slabs were constructed with different flexural reinforcement ratios and employed headed stud rails placed in either a radial or cruciform configuration. The results showed that the use of shear studs provided in the cruciform or the radial shear stud layout greatly improved the shear-resisting behaviors of the slabs, and that the structural responses of the slabs employing the two different stud layouts were found to be comparable in nearly all respects.
Related References:
ACI Committee 318, 2014, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 519 pp.
ACI Committee 352, 2011, “Guide for Design of Slab-Column Connections in Monolithic Concrete Structures (ACI 352R-11) and Commentary,” American Concrete Institute, Farmington Hills, MI.
Birkle, G., and Dilger, W. H., 2009, “Shear Strength of Slabs with Double-Headed Shear Studs in Radial and Orthogonal Layouts,” Thomas T.C. Hsu Symposium: Shear and Torsion in Concrete Structures, SP-265, A. Belarbi, Y. L. Mo, and A. Ayoub, eds., American Concrete Institute, Farmington Hills, MI, pp. 499-510.
Broms, C. E., 2007, “Ductility of Flat Plates: Comparison of Shear Reinforcement Systems,” ACI Structural Journal, V. 104, No. 6, Nov.-Dec., pp. 703-711.
Dam, T. X.; Wight, J. K.; and Parra-Montesinos, G. J., 2017, “Behavior of Monotonically Loaded Slab-Column Connections Reinforced with Shear Studs,” ACI Structural Journal, V. 114, No. 1, Jan.-Feb., pp. 221-232.
Einpaul, J.; Brantschen, F.; Fernández Ruiz, M.; and Muttoni, A., 2016, “Performance of Punching Shear Reinforcement under Gravity Loading: Influence of Type and Detailing,” ACI Structural Journal, V. 113, No. 4, July-Aug., pp. 827-838. doi: 10.14359/51688630
European Committee for Standardization, 2004, “Eurocode 2: Design of Concrete Structures (EN 1992-1-1:2004),” Brussels, Belgium.
Fédération Internationale du Béton, 2013, “fib model code for concrete structures 2010,” Lausanne, Switzerland.
Fernández Ruiz, M., and Muttoni, A., 2009, “Applications of Critical Shear Crack Theory to Punching of Reinforced Concrete Slabs with Transverse Reinforcement,” ACI Structural Journal, V. 106, No. 4, July-Aug., p. 485.
Gayed, R. B.; Peiris, C.; and Ghali, A., 2017, “Flexure-Induced Punching of Concrete Flat Plates,” International Symposium on Punching Shear in Structural Concrete Slabs: Honoring Neil M. Hawkins, SP-315, C. E. Ospina, D. Mitchell, and A. Muttoni, eds., American Concrete Institute, Farmington Hills, MI, pp. 73-99.
Ghali, A.; Gayed, R. B.; and Dilger, W., 2015, “Design of Concrete Slabs for Punching Shear: Controversial Concepts,” ACI Structural Journal, V. 112, No. 4, July-Aug., p. 505. doi: 10.14359/51687707
Glikman, M.; Polo, G.; Bayrak, O.; and Hrynyk, T. D., 2017, “Application of an Inclined Shear Reinforcing Assembly for Slab-Column Connections,” Recent Developments in Two-Way Slabs: Design, Analysis, Construction, and Evaluation, SP-321, M. Mahamid and M. (J.) Shin, eds., American Concrete Institute, Farmington Hills, MI, pp. 7.1-7.20.
Hegger, J.; Sherif, A. G.; Kueres, D.; and Siburg, C., 2017, “Efficiency of Various Punching Shear Reinforcement Systems for Flat Slabs,” ACI Structural Journal, V. 114, No. 3, May-June, p. 631. doi: 10.14359/51689434
Heinzmann, D.; Etter, S.; Villiger, S.; and Jaeger, T., 2012, “Punching Tests on Reinforced Concrete Slabs with and without Shear Reinforcement,” ACI Structural Journal, V. 109, No. 6, Nov.-Dec., p. 787.
Johansen, K. W., 1962, Yield-Line Theory, Cement and Concrete Association, (translation), London, UK, pp. 181.
Langohr, P. H.; Ghali, A.; and Dilger, W. H., 1976, “Special Shear Reinforcement for Concrete Flat Plates,” ACI Journal Proceedings, V. 73, No. 3, Mar., pp. 141-146.
Lips, S.; Fernández Ruiz, M.; and Muttoni, A., 2012, “Experimental Investigation on Punching Strength and Deformation Capacity of Shear-Reinforced Slabs,” ACI Structural Journal, V. 109, V. 6, Nov.-Dec., pp. 889-900.
Matzke, E. M.; Lequesne, R. D.; Parra-Montesinos, G. J.; and Shield, C. K., 2015, “Behavior of Biaxially Loaded Slab-Column Connections with Shear Studs,” ACI Structural Journal, V. 112, No. 3, May-June, p. 335. doi: 10.14359/51687408
Muttoni, A., 2008, “Punching Shear Strength of Reinforced Concrete Slabs without Transverse Reinforcement,” ACI Structural Journal, V. 105, No. 4, July-Aug., pp. 440-450.
Polo, G. E., 2018, “Punching Shear or Reinforced Flat Plates: Behavior and Design Considerations,” doctoral dissertation, University of Texas at Austin, Austin, TX. (Publication delayed until May 2022)
Rizk, E.; Marzouk, H.; and Hussein, A., 2011, “Punching Shear of Thick Plates with and without Shear Reinforcement,” ACI Structural Journal, V. 108, No. 5, Sept.-Oct., p. 581.
Seible, F.; Ghali, A.; and Dilger, W. H., 1980, “Preassembled Shear Reinforcing Units for Flat Plates,” ACI Journal Proceedings, V. 77, No. 1, Jan., pp. 28-35