Dimensionamento de pilares de concreto armado: análise comparativa entre os métodos aproximados estabelecidos pela NBR 6118:2014

Abstract

This work presents a comparison on use of steel in columns calculated by different regulated methods of local effects of 2a order available at ABNT NBR 6118:2014. In Brazil, the most used method in civil construction is the reinforced concrete and the Norm responsible for dimensioning columns provides several forms of calculation to obtain a safe structure, these methods are approximate which can generate different results. The work initially supply basic concepts on the subject and a bibliographic review of predecessor studies close to the subject. After that, with the use of P-Calc app, was simulated and calculated columns with slenderness index values of 35, 50, 75 and 90, differents loads and moments applied, characteristic strength of concreto to compression of 25, 35 and 45 MPa by the different methods presents at ABNT NBR 6118:2014. In the end, was made a comparative analysis of the amount of steel requesting that each method requires for each collumn situation in wich it presented a required reinforcement rate difference of up to 1,27%.