Comparação entre o método de cálculo manual e de um software comercial no dimensionamento de lajes maciças

Abstract

Due to the demand in the structural design market to have more efficient, economical and faster designs, several engineering software have been developed in order to reduce the designer's work in carrying out calculation routines and reduce the work generated in the detailing of the entire project, providing an environment so that the designer could focus on structural solutions that would result in economic gains in the amount of concrete and steel used. Even though the software presents more reliable results, the standard responsible for projects of reinforced concrete structures in Brazil does not specify which method to be used, which creates space for comparisons of material consumption, structural behavior and project detailing. The purpose of this work was to develop a structural project for a multi-family residential building in reinforced concrete, aiming to review and apply the concepts learned in reinforced concrete disciplines throughout the course. Two calculation procedures were adopted, the computational procedure, using the Eberick software and the manual procedure, using the Marcus method, with the aid of electronic spreadsheets in accordance with the prescriptions of ABNT NBR 6118:2014. Next, a comparison was presented between the results obtained by the two calculation procedures, analyzing possible discrepancies and, simultaneously, their justifications. This made it possible to conclude which method was more economical.