RC flat slab with opening strengthened embedded bearing plate under Punching shear
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Abstract
Reinforced concrete slabs that contain service or architectural openings near the column are usually designed using traditional methods provided by international specifications. These methods are limited in terms of the location and size of the opening and the methods of reinforcement to resist punching shear. This research presents an experimental study of flat slabs that contain an opening near the column using a steel plate to demonstrate its effect on the behavior of the roof to resist punching shear. This research presents one of the ways to strengthen these openings using steel plate. Steel plate is considered one of the important solutions to increase the resistance of flat slabs to failure of perforating shear that contain service openings next to the columns. The results showed that the presence of openings near the column led to a decrease in the resistance to punching shear and a change in the behavior of the flat slab. The use of the steel plate leads to a further improvement of the behavior of the flat slab compared to the model that contains an opening and is not supported by the steel plate. The presence of the opening near the column led to a decrease in the maximum load by 58%, and the use of the steel plate and fixing it in different ways led to an increase in the maximum load (70-107%), depending on the fixation methods and the thickness of the steel plate.
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References
Torabian, A., Isufi, B., Mostofinejad, D., Ramos AP. “Behavior of thin lightly reinforced flat slabs under concentric loading. Eng Struct”, 2019.
Torabian A, Isufi B, Mostofinejad D, Pinho Ramos A. “Flexural strengthening of flat slabs with FRP composites using EBR and EBROG methods”, Eng Struct, 2020.
Wood, J.G.M., “Pipers Row Car Park, Wolverhampton: quantitative study of the causes of the partial collapse on 20th March 1997”, SS&D Contract Report to HSE, Northbridge House, Chiddingfold, Surrey GU8 4UU, England, 2010.
Moe, J., "Shearing Strength of Reinforced Concrete Slabs and Footing under Concentrated Load" Portland Cement Association Research and Development Laboratories Bulletin D47, April 1961, PP. 130.
British Standards Institution BS 8110: Part1:1997, London, ''Code of Practice for Design and Construction''
ACI CODE-318-19: Building Code Requirements for Structural Concrete and Commentary”. American Concrete Institute, Farmington Hill, MI, 2019.
Teng, S.; Cheong, H.K.; Kuang, K.L.; Geng, J.Z. Punching Shear Strength of Slabs with Openings and Supported on Rectangular Columns. Struct. J. 2004, 101, 678–687, doi:10.14359/13390.
Liberati, E.A.P.; Marques, M.G.; Leonel, E.D.; Almeida, L.C.; Trautwein, L.M. Failure Analysis of Punching in Reinforced Concrete Flat Slabs with Openings Adjacent to the Column. Eng. Struct. 2019, 182, 331–343, doi: 10.1016/J.ENGSTRUCT.2018.11.073.
B.S:1881: Part 116:1983 "Method for Determination of Compressive Strength Concrete Cube ", British standard institution, (1983).
ASTM C496-11, “Splitting Tensile Strength of Cylindrical Concrete Specimens”, West Conshohocken: ASTM Int., 2011
ASTM 293–79 “Flexural Strength of Concrete (Using Simple Beam with Centre – Point Loading)”, Annual Book of American Society for Testing Concrete and Materials, Philadelphia, Pennsylvania, 2014.
ASTM C469-02, “Standard test method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression”, Annu. B. ASTM Stand., 2002.