Structural Analysis and Design of Flat Slab with Irregular Column Layouts using Simplified Design Method

International Journal of Civil Engineering

© 2020 by SSRG - IJCE Journal

Volume 7 Issue 7

Year of Publication : 2020

Authors : Mohammed Salem Al-Ansari, Muhammad Shekaib Afzal

10.14445/23488352/IJCE-V7I7P107

How to Cite?

Mohammed Salem Al-Ansari, Muhammad Shekaib Afzal, "Structural Analysis and Design of Flat Slab with Irregular Column Layouts using Simplified Design Method," SSRG International Journal of Civil Engineering, vol. 7,  no. 7, pp. 44-52, 2020. Crossref, https://doi.org/10.14445/23488352/IJCE-V7I7P107

Abstract:

This paper presents a simplified design method (SDM) to analyze and design the flat plates with irregular column layouts. The flat plates having the irregular panels are subdivided into triangular panels. Flexural design formulas for the largest triangular slab panel are derived based on the theoretical principles of plate and yield line theories and using the ultimate-strength design method USD under the provisions of ACI building code of design (ACI 318-14). Six different flat slabs with irregular column layouts (FS-1 to FS-6) are selected in this study to be analyzed and designed using the simplified design method approach. Numerical examples for two of the slabs (FS-3 and FS-6) are also presented to illustrate the method capability of designing the flat slabs having irregular column layouts. The selected slab sections (FS-1 to FS-6) are also analyzed and designed using the computer software (SAFE) and the results obtained are compared with the numerical solutions. The percentage difference of the simplified design method with the finite element software (SAFE) ranges from 4% to 20% indicates that the SDM is a good and quick approach to design a flat slab having an arbitrary/irregular column layout.

Keywords:

Irregular columns layout, Flat slabs, Triangular Panels, Simplified design method.

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