Pilot Experimental Tests on Punching Shear Strength of Flat Plates Reinforced with Stirrups Punching Shear Reinforcement

Mohamed Hassan, Ahmed M. Abdel Rahman, Alaa Sherif, Moustafa Osman, Asmaa Ahmed


Flat plates are favor structure systems usually used in parking garages and high-rise buildings due to its simplicity for construction. However, flat plates have some inherent structural problems, due to high shear stress surrounding the supporting columns which cause a catastrophic brittle type of failure called "Punching Shear Failure". Several solutions are used to avoid punching shear failure, including the use of drop panels or punching shear reinforcement. The latter is being a more sophisticated solution from the structural ductility, the architectural and the economical point of view. This study aims at investigating the effect of stirrups as shear reinforcement in enhancing the punching strength of interior slab-column connections. A total of four full-scale interior slab-column connections were tested up to failure. All slabs had a side length of 1700 mm and 160 mm thickness with 200 mm x 200 mm square column. The test parameters were the presence of shear reinforcement and stirrups concentration around the supporting column. The test results showed that the distribution of stirrups over the critical punching shear zone was an efficient solution to enhance not only the punching shear capacity but also the ductility of the connection. Furthermore, the concentrating of stirrups shear reinforcement in the vicinity of the column for the tested slabs increases the punching shear capacity by 13 % compared to the uniform distribution at same amount of shear reinforcement.


Flat Plate; Punching Shear; Parking garages

Full Text:



- A.G. Sherif, Behavior of Reinforced Concrete Flat Slabs. Ph.D. Thesis, Civil Engineering Department, Calgary University, Canada, 1996.

- A.G. Sherif, W.H. Dilger, Critical Review of the CSA A23.3-94 Punching Shear Provisions for Interior Columns. Can. J. Civ. Eng. 23(5) (1996) 998-1011. doi:10.1139/l96-907

- M. Hassan, E.A. Ahmed, B. Benmokrane, Punching-Shear Strength of GFRP-Reinforced Concrete Flat Slabs. Can. J. Civ. Eng. 40(10) (2013) 951-960. doi: 10.1139/cjce-2012-0177

- ACI committee 318, Building Code Requirement for Structural Concrete (ACI 318-05) and Commentary (ACI 318R-05). American Concrete Institute, 2014.

- BS 8110, Structural use of concrete, Part 1, Code of practice for design and construction. British Standards Institution, London, 1997.

- CEB-FIP Code, Model Code for Concrete structure. Comité Européen du Béton (European Committee for Concrete) – Fédération International de la Précontrainte (International Federation for Prestressing), Lausanne, Switzerland, 1995.

- CSA Standard A23.3-M14, Design of concrete structures for building, Canadian standard association. Toronto, 2014.

- Egyptian Code Committee ECP 203-2007, Egyptian Code of Practice for Design and Construction of Reinforced Concrete Structures. Building research Centre, Cairo, 2007.

- Eurocode2: Design of concrete structures- DD ENV-1992-2, 2001.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

ISSN 2170-127X

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at http://revue.ummto.dz.