Procedimentos simplificados de projeto para as estruturas de edifícios de pequeno porte

Abstract

In recent decades, with advances in microelectronics and computers, the exact structural calculation procedures could be implemented in commercial programs, facilitating the work of designers of structures. However, due to the high cost of these programs, the approximate calculation methods are still widely used in cases of small structures. This paper makes a comparison of internal forces and elastic deformations obtained by exact and approximate calculation methods in reinforced concrete structures. The analysis was performed considering the limitations indicated by the Brazilian Concrete Institute (IBRACON) for small structures, with the following structural elements studied: solid slabs, beams and columns, each with arbitrary geometry and loading. In general, the approximate methods used were satisfactory in obtaining internal forces - simply, the average values ranged from 20% lower to 15% higher than found by the exact method. To calculate the deformations, the approaches were unsatisfactory, with the best values below 30% of the deformations obtained by the exact method.