Análise de seção transversal de pilares mistos de aço e concreto submetidos a esforço axial de compressão

Abstract

With the search for optimization of materials used in civil construction, mixed steel and concrete structures have great potential for use in Brazil, having several advantages such as fire resistance, corrosion, high compressive strength and reduced local buckling. The use of mixed structures has been very efficient in tall buildings and structural reinforcements. This paper deals with a comparative study of the simple compressive strength between reinforced concrete pillars and fully filled mixed steel and concrete columns dimensioned following the recommendations of Annex P of ABNT NBR 8800: 2008 through Excel spreadsheet. For comparative effect of the load bearing capacity, several columns with longitudinal bars were designed according to the recommendations of ABNT NBR 6118: 2014 and dimensioned with the aid of the free software PCalc v1.4. The analysis focused on comparing different cross sections in order to find the highest strength for simple normal compression and the lowest cost to perform the abutments. The results obtained were satisfactory, as a compensatory cost difference was found for the execution of fully filled mixed steel and concrete columns.