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Analysis and Design of Flat Slab, Grid Slab and Bubble Slab


Mayuri S. Sethia , YESHWANTRAO CHAVHAN COLLEGE OF ENGINEERING, NAGPUR; Prof. R. S Deotale, YESHWANTRAO CHAVHAN COLLEGE OF ENGINEERING, NAGPUR; P. S. Patankar, P.S. Patankar and Associates Structural Consultant, Nagpur


Flat Slab, Grid Slab, Bubble Slab, SAFE


In present era, large column free space is required in auditoriums, vestibules, theatre hall, shopping malls etc. The use of Flat slab, Grid slab and Bubble slab fulfils the requirement in terms of architectural flexibility, use of space, and shorter construction time. In the present work an “IT Park for Vidarbha InfoTech Ltd., Nagpur.” building of 2B+G+10story is considered. For modelling, analysis and designing of flat flab and grid slab structures, SAFE software is used. The dead load and live load are considered as per IS 875-1987. The design is carried out as per IS 456-2000 and for reinforcement detailing SP 34 is used. Bubble Deck is intended to be a flat, two-way spanning slab supported directly by columns. The design of this system is generally regulated by the allowed maximum deflection during service loading; code used is BS8110 and only details of the Bubble slab is carried out. This paper states that the Flat slab with drop are preferable to use due to its increase negative moment capacity of slab, stiffness of the slab achieved and reduction of slab depth. Though concrete and steel required in flat slab is more compared to grid slab but using grid slab requires special formwork. Its formwork rate is double the rate of flat slab. Bubble slab reduces 50% of concrete and is to taken in action in India due to its various advantages.

Other Details

Paper ID: IJSRDV5I21252
Published in: Volume : 5, Issue : 2
Publication Date: 01/05/2017
Page(s): 1363-1366

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