ANALYSIS AND DESIGN OF FLAT SLABS USING VARIOUS CODES

S.S.Patil, Rupali Sigi

Abstract: “Flat Slab” is better understood as the slab without beams resting directly on supports (like columns & or walls).By virtue of that large Bending Moment & Shear Forces are developed close to the columns. These stresses brings about the cracks in concrete & may provoke the failure of slab, thus there is a need to provide a larger area at the top of column recognized as column head/ capital. The analysis of flat slab is executed by Direct Design Method (DDM) & Equivalent Frame Method (EFM) as directed by different standard, however the Finite element analysis & Equivalent frame analysis is carried out by using software SAFE (Slab Analysis by Finite element method and Equivalent frame method). The analysis & design is performed by Equivalent Frame Method with staggered column & without staggered column as prescribed in the different codes like IS 456-2000, ACI 318-08, BS 8110-1997, EC2 Part1 2004 are compared. In this process moments are distributed as column strip moments & middle strip moments. The methodology for analysis & design of slab is thoroughly explained in the paper. Equivalent frame analysis is also carried out for distribution of column strip moments & middle strip moments by using software SAFE. Excel worksheets for analysis and design of flat slab using equivalent frame method for all standard codes are also prepared.

Keywords: Flat Slab, IS 456-2000, ACI 318-08, BS 8110-1997, EC2 Part I 2004 etc…

DOI: https://doi.org/10.15623/ijret.2014.0304075