STRUCTURAL ANALYSIS OF REGULAR AND IRREGULAR BUILDINGS WITH BUBBLE DECK SLAB AND CONVENTIONAL SLABS

Abstract

Slab is a structural member which plays an important role in transferring the load safely to beam and column. While designing the reinforced concrete structure the main parameter considered is the span of the slabs between columns. For designing larger span slabs, support beams or/and thick slabs are provided which results in heavy or large amount use of concrete and which results is increase of self weight of slabs. Lighter structures are mainly preferable than the heavier structures because a larger dead load for a building increases the magnitude of inertia forces the structure must resist as large dead load contributes to higher seismic weight. Incorporating support beams can also contribute to larger floor-to-floor heights which consequently increases costs for finish materials and cladding. So, to avoid the increase in self-weight of slab, the centre inactive concrete in slab is replaced with HDPE Balls (High Density Polyethylene Balls). The bubble deck is also known as voided slab. Use of spherical balls to fill the voids in the middle of a slab eliminates 35% of a slab self-weight compared to solid slab having same thickness without affecting its deflection behavior & bending strength. This helps in reduce of self weight, less emission of CO2 as less concrete will be used in slab and large spans in slabs can also be adopted. In short, the HDPE balls helps to fill the voids in centre of slab. Flat slab is a bolstered concrete slab supported at once by concrete columns without the use of beams. Flat slab is described as one sided or - sided support gadget with sheer load of the slab being concentrated on the helping columns and a square slab known as ‘drop panels’. Drop panels play a big function here as they increase the overall capacity and durability of the floors device beneath the vertical hundreds thereby boosting cost effectiveness of the construction. In the present study a comparative analysis of regular buildings and irregular buildings are carried out using flat slab, bubble deck slab for 10 storey building. The comparison of storey drift, storey shear, displacement, time period, frequency, bending values are compared with conventional slab using ETABS software