COMPARISON OF STEEL CONCRETE COMPOSITE(SCC) AND REINFORCED CONCRETE(RC) STRUCTURES IN HIGH RISE BUILDING WITH REGARD TO USABLE AREA AND COST SAVING ASPECTS: A CASE STUDY ON B+G+10, B+G+15 AND B+G+19 BUILDINGS AT ADAMA TOWN.

Major Advisor: Dr. Kabtamu Getachew Executive Summary In recent years, the shortage and value of land in terms of cost and asset has increased, these lead us to use land effectively and efficiently. This is more significant in High-Rise multi storey buildings, where small unusable dimension from each floor will accumulate and add up to huge loss of usable area. The concrete-steel composite construction has obtained an extensive receiving around the globe. However, as Ethiopia is a developing country, it is relatively a new concept for its construction industry when compared with the developed countries around the globe. Although, the RCC construction is suitable and economical for construction of framing systems of low-rise buildings, but 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. RC construction have some problems regarding saving area and also demographic chart of static data shows that the population growth rate doubled with in a year and population flows from rural are to urban is very high but the area which we have is remain the same, these leads us to use alternative technology. As our country is one of the poorest countries when we talk about new technology in our society mind, about its cost comes first. So these researches try to answer their question regarding these new technology cost and try to distinguish which technology save usable area. B+G+10, B+G+15 & B+G+19 storey commercial building are selected for this study in Adama city, Oromia, Ethiopia. A comparison is made between conventional RCC columns structure and SCC concrete-encased composite columns structure. The Linear Respectrum Analysis is performed using ETABS-2018 software for different height of building such as B+G+10, B+G+15 & B+G+19. In the design, the strength and serviceability requirements is checked satisfying the Ethiopian new code requirements ESEN 8, 2015, ENES 2,2015 and ESEN 4,2015. Finally comparison is made with respect to usable area, cost and dead weight of both structures and conclusion will be drawn accordingly. According to this research both RC and SCC are with in allowable limit with regard to strength performance such as period of vibration, storey drift, storey displacement and base shear, thus the thesis main aim is as comparing SCC and RC with regard to usable area and cost saving. These thesis shows that SCC save 1.6% of the total area of building than RC but as cost aspect due to low industrialization of steel in Ethiopia RC become economical and RC have maximum dead weight than SCC.