Fathelrahman M. Adam, Hytham M. S, Mohamed G. S


This paper deals with the yield line analysis of orthotropic reinforced concrete two-way slab under the effect of uniformly distributed pressure load. The analysis was based on the method developed by Johansson, in which a general formula was derived to calculate the ultimate positive bending moment for the long span. The general formula depends mainly on the geometric dimensions resulting from the yield lines pattern as well as the moment's coefficients that have been used to relate the calculated moments with other moments. The moment's coefficients have been derived numerically using STAAD-Pro Software by adopting nine cases of boundary conditions with using different spans ratios range from 1.0 to 2.0. For the nine cases and with using different spans ratios, the ultimate bending moments have been calculated using yield line method. The results obtained were compared to that extracted from the BS8110 Code as well as those obtained using STAAD-Pro Software


Yield line method; Two-way Slab; Analysis of slab; Slab moment's coefficients

Full Text:



Jinxin Gong; Yanqing Zhang; and Shi Han, "Ultimate Bearing Capacity of Reinforced Concrete Slab Carrying Concentrated Load", Journal of Engineering Mechanics, ASCE, Vol. 137, No. 12, pp 877–886 December 1, 2011. [2] A. Thavalingam, A. Jennings, J.J. McKeown, D. Sloan, "A computerised method for rigid-plastic yield-line analysis of slabs", Computers and Structures 68, pp 601-612, 1998 [3] Kennedy, G., and Goodchild, C. H., "Practical yield-line design", Concrete Centre, Surrey, U.K., 2004. [4] Linwei He; Matthew Gilbert, M. ASCE; and Marcus Shepherd, "Automatic Yield-Line Analysis of Practical Slab Configurations via Discontinuity Layout Optimization", J. Struct. Eng, ASCE, 143(7): 04017036, 2017.

Matthew Gilbert, Linwei He and Thomas Pritchard, "The yield-line method for concrete slabs: automated at last", The Structural Engineer, 93 (10), 44-48, 2015. [6] K. W. Johansen,"Yield Line Theory", Cement and Concrete Association, London, 1962. [7] PEI-KAO HSUEH, "THE YIELD-LINE THEORY FOR CONCRETE SLABS", MSc. Thesis, KANSAS STATE UNIVERSITY Manhattan, Kansas, 1966. [8] Adil. A. M., Fathelrahman. M. A, Izeldein. J. I., "Investigation of Ultimate Resisting Moment of Reinforced Concrete Slabs Systems using Yield Line Theory, BS8110 and Computer Software", IJREAT, Volume 4, Issue 1, pp 37-44, 2016. [9] BS8110, Part 1: "Code of practice for design and construction", BSI, 2nd Second edition, 1997.


  • There are currently no refbacks.