Análisis comparativo de costos entre estructuras de hormigón aramado y acero

Abstract

The present work has been done, to know the cost of construction in reinforced concrete and steel structures, for which we have taken as a reference, a 10-storey type building and a two-storey house, for this it is first necessary to carry out the analysis And structural design with the two materials mentioned above. For the design of the reinforced concrete structure we have been based on the standards of code ACI 318-99. The design of the steel structure is possible by means of hot rolled sections, reinforced girders or cold bent profiles. The steel in our country is imported and there are no hot rolled profiles on the market such as those listed in the AISC code, the hot rolled profiles in the Ecuadorian market are profiles with a maximum height of 40cm with very great thicknesses in relation to their Exterior dimensions so that they are not economical, for this reason the structure of the 10-story building will be made using reinforced girders based on AISC standards. Cold folded profiles are a good choice for steel structures, but commercially they exist in small dimensions with thicknesses of up to 6mm so they can not be used in large buildings, but if they are very useful in small buildings, this Reason, the two-story house will be made with these profiles, based on the rules of the AISI code. The AISC and AISI codes govern the elastic design of structures with hot rolled sections or reinforced girders and with cold folded profiles respectively. The plastic design of structures with the RLFD code, is still not recommended to be used in the design of tall buildings because it is not well defined and does not apply to thin steel profiles because their width to thickness ratios are much larger than those Are required for the formation of plastic joints and before this would occur local buckling.