期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2018
卷号：7
期号：5
页码：4866-4873
DOI：10.15680/IJIRSET.2018.0705065
出版社：S&S Publications
摘要：Flat slab called beamless slab is a slab supported directly by columns without beams. A part of slab
bounded on each of the four sides by centre line of column is called a panel. Panel may be divided into column strip
and middle strip. The flat slab is often thickened closed to supporting columns to provide adequate strength in shear
and to reduce the amount of negative reinforcement in the support regions. The thickened portion ie the projection
below the slab is called drop or drop panel. In some cases , the section of column at top as it meets the floor slab or
drop panel, is enlarged so as to increase primarily the perimeter of the critical section, for shear and increasing the
capacity of slab for resisting two-way shear and to reduce –ve BM at the support. Such enlarged or flared portion is
called capital. Slabs of constant thickness which donot have drop panels or column capitals are refered to as flat plates.
Flat slab systems are popular for use in office and residential buildings, hospitals, schools and hotels. They are quick
and easy to formwork and build. Absence of beams allows lower storey heights and as a result cost saving in vertical
cladding, partition walls, mechanical systems, plumbing and a large number of other items of construction especially
for medium and high rise buildings. They provide flexibility for partition location and allow passing and fixing services
easily.
