STUDY OF TORSIONAL IRREGULARITY WITH SEISMIC LOADS OF RC BUILDING IN DIFFERENT FOUR ZONES OF BANGLADESH ACCORDING TO BNBC-2020

This paper presents the results of a linear static analysis conducted on a (B+G+4) story building using the static Analysis approach in four different zones in Bangladesh. An analytical 3D model of the building, including irregularities, was created and analyzed using the ETABS structural analysis software. This comprehensive model encompasses all significant structural elements affecting key parameters like maximum displacement, maximum story drift, story stiffness, and maximum story displacement. The building chosen for this study is based on an architectural plan located in Faridpur city, and we analyzed it for 3 more different seismic zones of Bangladesh. It was meticulously recreated in a digital model, subjected to various loads, and then analyzed using static Analysis in accordance with the Bangladesh National Building Code (BNBC) of 2020. This research aims to gain a profound understanding of how structures react to seismic forces and adopt a multidimensional approach to enhance their earthquake resistance capabilities in various zones. our study underscores the pressing need for proactive measures to address seismic vulnerabilities in Bangladesh. By exploring torsional irregularities in RC buildings within the framework of BNBC-2020, we are taking a significant step towards enhancing the seismic resilience of structures, ultimately safeguarding lives and property with a safe design method for assessing and improving the earthquake resilience of structures.