Punching Shear Strength of Reinforced Concrete Flat Plates with Openings
Main Article Content
Abstract
Test results of six half-scale reinforced concrete flat plates connections with an opening in the vicinity of the column are reported. The test specimens represent a portion of a slab bounded by the lines of contraflexure around the column. The tests were designed to study the effect of openings on the punching shear behavior of the slab-column connections. The test parameters were the location and the size of the openings. One specimen had no opening and the remaining five had various arrangements of openings around the column. All specimens were cast with normal density concrete of approximately 30 MPa compressive strength. The openings in the specimens were square, with the sides parallel to the sides of the column. Three sizes of openings were used: the same size as the column (150 x 150 mm), 67 percent of the column size (100 x 100mm), and 150 percent of the column size (225×225mm). Due to the presence of the openings, the specimens showed a decrease in punching shear capacity ranged between 11.43% and 29.25% with respect to the control solid slab. Also, the stiffness decreased between 0.31% and 83.00%, depending on the size and location of these openings with respect to the column.
2014-01-01
Article Details
How to Cite
Publication Dates
References
Bompa, D.V., and One, T.,(2010) "Behaviour of Symmetric Flat-Slab Connections with Openings in the Control Perimeter", North University Of Baia Mare, Scientific Bulletin, Series D, Vol. XXIV, No.2, pp. 111-116.
El-Salakawy, E. F., Polak, M.N., and Soliman, M.H,(1999) "Reinforced Concrete Slab-Column Edge Connection with Openings", ACI Structural Journal, Vol. 96, No. 1, January, PP. 79-87.
Ferguson, P.M., (1981) "Rinforced Concrete Fundamentals", 4th Edition, John Wiley & Sons, Inc., 694 pp.
Guan, H., (2009) "Prediction of Punching Shear Failure Behavior of Slab-Edge Column Connections with Varying Opening and Column Parameters". Advances in Structural Engineering-An International Journal, vol. 12, No.1, PP. 19-36.
Harajli, M.H. , Soudki, K.A.,(2003) " Shear Strengthening of Interior Slab-Column Connections Using Carbon Fiber-Reinforced Polymer Sheets", Journal of Composites for construction ,ASCE, Vol. 7, No. 2, pp. 145-153.
Hognestad, E., Elstner, R.C. and Hanson, J.A.,(1964) "Shear Strength of Reinforced Structural Lightweight Aggregate Concrete Slabs", ACI Structural Journal, Vol. 61, No. 6, June, pp. 643-656.
Hong, G. and Yew-Chang, L.,(2003) "Failure Analysis of Column-slab Connections with Stud Shear Reinforcement", Canadian Journal of Civil Engineering, Vol.30, pp.934-944.
McCormac, J.C.,(2001) "Design of Reinforced Concrete", 5th Edition, John Wiley &Sons, Inc., 738 pp.
Moe, J.,(1961) "Shearing Strength of Reinforced Concrete Slabs and Footing under Concentrated Load" Portland Cement Association Research and Development Laboratories Bulletin D47, April, 130 pp.
Nilson, A. H. , Darwin, D. and Dolan, C. W. ,(2004) "Design of Concrete Structure" McGraw-Hill Book Company, Thirteen Edition, 412 pp.
Polak, M.N., El-Salakawy, E. F., and Soudki, K.A.,(2003) "New Shear Strengthening Technique for Concrete Slab-Column Connections", ACI Structural Journal, Vol. 100, No. 3, May, pp. 297-304.
Sharaf, M.H., Soudki, K.A., and Dusen, M.V.,(2006) " CFRP Strengthening for Punching Shear of Interior Slab-Column Connections", Journal of Composites for construction ,ASCE, Vol. 10, No. 5, pp. 410-418.
Soudki, K., El-Sayed, A.K., and Vanzwol, T.,(2012) "Strengthening of Concrete Slab-Column Connections Using CFRP Strips", Journal of King Saud University-Engineering Sciences, Vol.24, Issue 1, January, pp. 25-33.
Tan, K. G. And Zhao, H. ,(2004) "Strengthening of Openings in One-Way Reinforced-Concrete Slabs Using Carbon Fiber-Reinforced Polymer Systems", Journal of Composites for construction ,ASCE, Vol. 8, No. 5, pp. 393-402.
Teng, S., Cheong, H.K., Kuang, K.L., and Geng, J.Z.,(2004) "Punching Shear Strength of Slabs with Openings and Supported on Rectangular Columns", ACI Structural Journal, Vol. 101, No. 5, September, pp. 678-687.