EFFECT OF LATERAL LOAD ON HIGH-RISE RC BUILDING FOR DIFFERENT BRACING AND BRACING LOCATION USING BNBC 2020

Abstract

Geographically distinct, Bangladesh is the world’s eighth most populous country. Located in northeastern South Asia, it borders the majestic Himalayan Mountains to the north, while the hilly forests of Tripura and Myanmar are to the east. The country’s mostly low-lying landscape makes it vulnerable to wind pressure and earthquakes due to its location. In Bangladesh, high-rise buildings are rare. Additionally, some structures are not properly designed to withstand lateral loads like earthquakes and winds. An even more concerning issue is that most buildings in Bangladesh are of the RCC category, but it is well known that RCC alone cannot sustain lateral loads. Therefore, civil engineers need to design structures capable of resisting earthquakes and storms. Consequently, this study examines the behavior of a G+15 reinforced concrete building with different types of bracing placed at various positions within the structure, analyzing drifts, displacements, modal shapes, and base shear according to BNBC 2020 code, specifically for Dhaka. Situated close to the meeting point of two fault lines, Dhaka is among the major earthquake-prone areas in Bangladesh due to its geographic location. Thus, designing buildings to withstand seismic forces is crucial for ensuring safety and stability in a heavily populated city like Dhaka.