Analysis of Multistory Buildings with Different Slab Thickness Using ETABS

Abstract

In this study RCC structural building is L-shape which is 384 m2 in plan, with a Floor-to-Floor height of 3 meters. The major purpose of this study is to use ETABS to identify the smallest slab thickness that can safely support loads and hence reduce slab deflection in a concrete floor. A crucial element in the design process is the selection and computation of slab thickness. If a good technique for calculating slab thickness is followed, the design time will be significantly reduced, in addition to achieving a dependable and cost-effective slab thickness. The process of determining the behavior of a structure under specific load combinations is known as analysis. Design is the process of determining the structure's proper requirements. For design this L-shape Structure, I have applied different kind of gravity loads like live load of 4.8 kN/m2 , Floor finish 1.2 KN/m2 and partial wall of 33% of live load as per BNBC 2020 code. Also earthquake loads have applied from base to top or roof of the building in Seismic Zone 2 by taking Zone factor(0.15), Type of soil (S1), Site coefficients, S (1.5), Numerical coefficient factor, Rw (8) and Ct(0.016,0.9) After making Twenty case study by change slab thickness and column size for check deflection under the limit. According to ACI 318-08-Table9.5 (ACI 318 Building Code Topic, n.d.) for deflection limitation. I found that S5C6 which is slab thickness and column size of 600mm by 600 mm was suitable because of reveals in equation 4.1. It’s observed that column size play vital role in this study and both slab thickness and column size has effect in this study.