A Comparative Study of Flat slab, Waffle Slab and Conventional RCC Slab under Dynamic loading

Abstract

In this modern era of infrastructure development the main issue is the shortage of land. To overcome this problem construction of tall building has been taking place everywhere. Most building is using framed structure to design and construct. The most determinant effect on a structure is generally caused by lateral component of earthquake load. As compared to gravity load effect, earthquake load effects on buildings are quite variable and increase rapidly as the height of building increases. The strength requirement is a dominant factor in the design of structure. As height increases the rigidity and stability of structure get affected and it becomes necessary to design the structure preferably for lateral forces, moments, story drift and total horizontal deflection at top most story level. During earthquakes, inspite of the weaknesses in the structural system, either code imperfections or error in analysis and design, the configuration of structural system has played a vital role in catastrophe The main objective of the study are to compare the seismic behavior of multi storey buildings having flat slab with and without drop panel, waffle slab and conventional R.C.C slab, in seismic zone 4 according to EBCS EN 1998-1:2013 and to study the effect of height of building on the performance under seismic forces. Linear dynamic response spectrum analysis performed on the structure to get the seismic behavior. In conclusion, the analysis and design result showed, there is a significant difference in the behavior of the parameter. The study reveals that the displacement of waffle slab is lower 19.50% compare to conventional slab, 21.77% compare to Flat slab with drop panel and 41.42% compare to Flat slab without drop panel. The base shear of waffle slab is lower 19.45% compare to conventional slab, 19.19% compare to Flat slab with drop panel and 47.24% compare to Flat slab without drop panel. The study showed that waffle slab building is much superior than Conventional, Flat slab with drop panel and Flat slab without drop panel not only in weight reduction but also the performance under dynamic loading.