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.
Modern day construction is widely influenced using concrete-steel composite columns. A lot of research on concrete-steel composite columns is being carried out around the world. The rapid growth in concrete-steel composite construction has widely decreased the use of conventional reinforced cement concrete construction (R.C.C), and the steel construction practices. The concrete-steel composite construction has obtained an extensive receiving around the globe. As Pakistan is a developing country, so, it is relatively a new concept for its construction industry when compared with the developed countries around the globe. Although, the R.C.C construction is suitable and economical for construction of framing systems of low-rise buildings, however, the increased dead load, span restrictions, less stiffness and risky formwork makes it uneconomical and unviable when it comes across the construction of intermediate to high-rise buildings. This research is an effort to learn the cost effectiveness, increased or decreased stiffness, and change on the functionality of the composite construction for intermediate to high-rise buildings constructed in Pakistan. A Base + Ground + 11 storey commercial building is selected for this study. A comparison is made between conventional R.C.C columns structure and concrete-encased composite columns structure. The equivalent static nonlinear analysis is performed using ETABS 2017 software. Although, for Base + Ground + 11 storey building, the construction cost of concrete-encased composite structure is 7.7% more than the conventional R.C.C columns structure, but the concrete-encased composite structure will have 13.013% more constructed floor area. This increased floor area helps to settle the cost difference between the two structures.
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