Comparison Of Wind And Seismic Effects On High Rise Multi -Storied Buldings For Two Selected Zones In Bangladesh By Using Etabs

Abstract

This study aims at the comparison of provisions of seismic and wind load 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+9 storey residential building situated in two selected seismic zones is conducted to investigate the seismic behavior of that building under revised seismic zones and seismic zone coefficients. In this study, the maximum story displacement of Zone 3 (Chittagong) to Zone 4 (Sylhet) high rise multistory structure is 0%, 127.57%, 58.34% and 58.14% for load EQX, EQY, WLX and WLY respectively. And the maximum story drift of Zone 3 (Chittagong) to Zone 4 (Sylhet) high rise multistory structure is 0%, 147%, 57.81%, and 56.45% for load EQX, EQY, WLX and WLY respectively. 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.