Análise técnica de estruturas de edifícios em concreto armado de 3 a 21 pavimentos, com variação de resistência à compressão.

Abstract

This study aimed to technical and economic analysis of buildings 3-21 floors, with application of different characteristic values compressive strength at 28 days (fck), ranging between 25 and 40 MPa, with geometric relation, in plant of 1:4. It is estimated that by the results obtained it is possible to assist the design and mainly, subsidize the budget of the superstructure of buildings in reinforced concrete that include such geometric relation. With the results, it follows that: (I) increasing the value of the "fck" implies a significant reduction of the dimensions of the elements of the vertical subsystems and steel consumption; (II) for the analyzed case ("A" to "F") , the average thickness of the flooring type and consumption of molds remained virtually independent of the increase in the value of "fck" constant; (III) the cost composition showed that systems dimensioned resistance concrete (C -35) produce lower overall costs.