Numerical Investigation of a 40-Storied RCC Building By Framed, Shear Wall-Framed, and Tube-in-Tube Structural Systems

Abstract

The demand for tall buildings in urban areas has been on the rise due to increased population densities and the rising cost of land. In Bangladesh, this trend has become increasingly evident in recent decades, with the construction of tall buildings of more than 20 stories becoming necessary, especially in cities like Dhaka. A tall building can be analyzed by different structural systems. In this research, a 40-storey RCC building is modeled and analyzed by ETABS 17.0 using three different structural systems: framed, shear wall-framed, and tube-in-tube. The analytical results have been compared under BNBC 2020. Necessary checks like the soft
storey, torsional irregularity, serviceability, etc. have also been performed. The research shows that the tube-in-tube system has the highest resisting capability against dead loads, live loads, wind, and seismic loads. Tube-in-tube showed minimal lateral displacement, a big concern for constructingsuper-tall buildings. It also provided the best  results in the case of torsional irregularity, soft storey, and serviceability checks. The results of this study will be useful to structural engineers, architects, and urban planners who are involved in designing and constructing tall buildings.