Analytical Study of Funicular and Flat Slabs

Author(s):

V. D. Santosh Kumar , Chaitanya Engineering College; A. Uma Maheswari, Chaitanya Engineering College

Keywords:

Funicular slab, doubly curved thin shells, waffle shells

Abstract:

A funicular slab is a thin doubly curved shell of a shape which is purely in compression in most parts of the shell. In funicular shells, the shape of the shell is such that under a particular loading condition, the shell is subjected to pure compression unaccompanied by bending and shear stresses. The shells are subjected to pure membrane state of stress, under appropriate loading and boundary condition the resulting bending and twisting moment are either zero or small which may be neglected. In this study doubly curved thin shells are analyzed using finite element software SAP 2000. Doubly curved shells which are in square plane having 3m*3m are considered. The behavior of shells under uniformly distributed load is studied and compared with the plane flat slabs of same dimensions and thickness. In this case study deflection curves, membrane stress contour diagram are obtained. It is observed that the deflections, bending moments and shell stresses of funicular shell are reduced when compared to flat slab.

Other Details:

Manuscript Id	:	IJSTEV5I8014
Published in	:	Volume : 5, Issue : 8
Publication Date	:	01/03/2019
Page(s)	:	46-50

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