Comparative Study Among Direct Design Method, Equivalent Frame Method and Finite Element Method for Analysis of Slabs

Main Article Content

Mereen Hassan Fahmi Rasheed Bahman Omar Taha

Abstract

Beam-column frame system and flat plate slab system are analysed by semi-empirical, Direct Design method (DDM) and approximate elastic method, Equivalent Frame method (FEM) and the results of both methods are compared with computer software based on Finite Element method (FEM), taking into account the effect of changing the beam and column stiffness and the panel length ratio, for 3, 4, and 5 equal span frames and three non-equal spans. The moment coefficients with respect to the maximum clear span moment are determined by the three methods for negative end moments at the face of support and mid span positive moment. These coefficients are constant in DDM, while in EFM are changed with changing the column and beam sizes. The results of EFM is more accurate than DDM, on the bases of results of EFM, new moment coefficients are suggested to use instead of DDM moment coefficients. In case of EFM calculation aren’t satisfactory for hand calculations the FEM is used by applying available computer software.

Article Details

How to Cite
FAHMI RASHEED, Mereen Hassan; TAHA, Bahman Omar. Comparative Study Among Direct Design Method, Equivalent Frame Method and Finite Element Method for Analysis of Slabs. Science Journal of University of Zakho, [S.l.], v. 6, n. 2, june 2018. ISSN 2410-7549. Available at: <http://sjuoz.uoz.edu.krd/index.php/sci/article/view/432>. Date accessed: 22 aug. 2018. doi: https://doi.org/10.25271/2018.6.2.432.
Section
Science Journal of University of Zakho

References

ACI Code (1963); "Building Code Requirements for Reinforced Concrete", ACI Publication 318-63, American Concrete Institute, Forming Hills, MI, 1963, USA.
ACI Code (2014). Building Code Requirements for Structural Concrete and Commentary, ACI 318-2014, American Concrete Institute, Forming Hills, MI 48331, USA, 520pp.
Darwin D., Dolon C. W. and Nilson A. H. (2016). Design of Concrete Structures, McoGrow Hill Education (India) Private Limited, Chennai, 15th edition, 780pp.
Patel J. J.and Dubey N. (2016). Comparison of Analysis Methods of Flat Slab, International Journal or Innovative Research in Science & Technology (IJIRST), No.2, Issue 12, May, pp. 459-463.
Patel S. S. and Sigi R. (2014). Analysis and Design of Flat Plat Slabs Using Various Codes, International Journal of Research in Science & Technology (IJReT), Vo.3, Issue 4, April, pp. 417-421.
Hassan M. I. and Ahmed A. (2016). Design Comparison of Flat Plat System by Direct Design Method and Equivalent Frame Method, https://www.researchgat.net/publication/281837415, 17 January.
Kudama L. (2015). Comparison of Equivalent Frame Analysis Results With Finite Element Analysis Results for Flat Plate Slab System, MSc thesis, Addis Ababa University, Addis Ababa Institute of Technology School of Civil and Enviromental Engineering.