Abstract

Tall and highrise buildings located in seismically vulnerable zones usually need to go through seismic evaluation in order to check its resilience against cyclic loading produced due to surface waves created by earthquakes. Large seismic waves create undulations in soils which drastically reduces the strength of foundations and ordinary moment resisting frames and the following aftershocks accelerates crack propagation of structural systems and dynamic overloading, leading to heavy toll on lives. In order to protect buildings in dynamically active zones, moment resisting frames need seismic detailing alongside seismic testing. These paper deals with nonlinear dynamic analysis(pushover techniques) on a highrise building located in Dhaka city which was originally designed as a simple moment resisting frame, and necessary optimisation of structural elements to improve its function against dynamic loading using the help from the BNBC code and the ETABS software.