A Comparison Study On Seismic Analysis Of Multi Storied (G+5=6) Residential BUlding For Different Zones In BangladeshUsing ETABS

Abstract

This study aims at the comparison of provisions of earthquake analysis given in BNBC 2020. The revised BNBC 2020 has divided the seismic zones of Bangladesh into four different categories such as Zone-Ⅰ, Zone-Ⅱ, Zone-Ⅲ and Zone-Ⅳ respectively. They have different seismic zone coefficients. Finally, structural analysis and design of a typical G+5 storey residential building situated in all four seismic zones is conducted to investigate the seismic behavior of that building under revised seismic zones and seismic zone coefficients. It is found that seismic base shear, displacement is much higher in zone-Ⅳ compared to other zones. For seismic zone-Ⅳ, overall highest displacement 46.19 mm and lowest displacement 4.64 mm in zone-Ⅰ. The deflection of various members, inter storey drift, lateral displacement of the whole structure and stress of all members, inter storey lateral displacement of the whole structure and stress of all members were checked comparison with limiting value of the design criteria. After the preliminary design, the various cross section of beams and column and beam which the volume of concrete and quantity of steel is saved to precise amount and maximize the usable floor area by satisfying the design criteria. Finally, the member of column & beam sizes increases same seismic zone variation concrete