Aplicativo para o dimensionamento de armaduras de estruturas laminares de concreto

Abstract

Among surface structures, shells exhibit a complex behavior generated by changes in boundary condition, special geometry and types of loads. Classical analytical solutions available to determine the internal forces required for the reinforcement design are not always easily obtained and, related to the technical bibliography, equations are established only for specific structures. Thus, for the analysis of general shells, softwares based on the Finite Element Method (FEM) are used. The section 14.2.3 of the NBR 6118:2014 code highlights that the reinforcement design cannot be performed only based on the stresses or internal forces, but the stress fields must be integrated along the shell thickness to this purpose. This work presents an application program developed in order to determine the reinforcement area for concrete laminar structures based on the Three Layers methodology presented in the Model Code 1990. Examples of FEM structural analysis of a slab and a dome are didactically explored in order to explain the reinforcement design procedure.