Economic and Functional Feasibility of Concrete and Steel Composite Column Building Structure

Abstract

Modern day construction is widely influenced using Steel-Concrete composite columns. The rapid growth in Steel-Concrete composite construction has significantly reduced the use of conventional Reinforced Cement Concrete (R.C.C) as well as other steel construction practices. Steel-Concrete composite construction gained an extensive receiving around the globe. Considering the fact that R.C.C construction is most suitable and economic for low-rise construction so it is used in framing system in most structures. However; increased dead load, span restriction, less stiffness and risky formwork makes R.C.C construction uneconomical and not suitable when it comes to intermediate to high-rise buildings. One Basement and 11 storeys existing building has been analyzed and comparison has been made between R.CC structure and concrete steel composite columns. Equivalent Static non -linear analysis was performed in X and Y direction by using Etabs 2017 software which results that encased composite columns construction cost is more than R.C.C columns but on the other hand encased composite columns has more floor area, the storey shear is more, story drift is less, storey displacement is less, in conventional R.C.C structures, storey shear is less in R.C.C conventional structure. Therefore; this research aims to analyze and to learn This research is an effort to learn cost effectiveness, increased or decreased stiffness and change on functionality of composite construction for intermediate to high-rise buildings in Pakistan. A Base + Ground +11 storey commercial building was selected for this study. Comparison is done between conventional R.C.C structure and Encased Composite column structure. Equivalent Static non-linear analysis was performed using ETABS 2017 software. Although for Base + Ground + 11 storey building the construction cost is 7.7% more than R.C.C structure but encased composite column building has 13.013% more floor area. This increased floor area will help to settle the cost difference between two structures.