A Comparative Study On Effects Of Lateral Loads On Residential Structures At Different Zones Of BNBC, With The Presence Of Shear Wall At Different Locations

Abstract

Bangladesh is located in a seismically active area. The ground shakes during an earthquake. As a result, the base of a building sitting on it will move. So it is necessary to ensure the adequacy of the structures against the horizontal load effect. With the help of BNBC's guidelines, the risk of failure in newly built infrastructure exposed to wind and earthquakes can be minimized. The latest BNBC code is Bangladesh National Building Code 2020 (BNBC 2020). In BNBC-2020, the seismic zone of Bangladesh has been divided into categories, such as Zone-I (seismic intensity: low), Zone-II (seismic intensity: moderate), Zone-III (seismic intensity: severe), and Zone-IV (seismic intensity: very severe). They have different seismic coefficients. This paper compares different seismic zone analyses of a multi-storeyed (G+9) residential building in all four seismic zones with and without shear wall. This paper's primary goal is to examine how this building responds to earthquakes in the updated seismic zone and coefficient and the effects of the shear wall location. The analyses. For different zones, wind speed and the seismic coefficient have been changed, and it mainly impacts the buildings. To compare these impacts based on environmental loads, we used four different locations in four different seismic zones. The locations of the different zones are Rajshahi (Zone-1), Dhaka (Zone-2), Rangpur (Zone-3), and Sylhet (Zone-4). Structural analysis is done by using ETABS (Extended Three-Dimensional Analysis of Building Systems) and compare the storey displacement, drift, stiffness etc. The results shows that the using of shear wall has an impact on design and stability of the structure. Keywords: Shear wall, Seismic zone, Base shear, Drift, Stiffness, Storey Displacement