Computational Implementation of Methods to Obtain Strength of Reinforced Concrete Sections under Axial Load and Biaxial Bending

Antônio Ribeiro de Oliveira Neto¹; Samuel Silva Penna¹

¹ Departamento de Engenharia de Estruturas da Universidade Federal de Minas Gerais

doi:10.20906/CPS/CILAMCE2017-0468

Resumo

Structural elements under axial load and biaxial bending are common in usual reinforced concrete structures, for example, buildings columns. Such solicitation is characterized by a normal force and a bending moment not coincident with the principal axes of inertia. In the desing of reinforced croncrete, the problem of determining the position of the neutral line does not present an explicit and direct solution, thus, the calculation of the load capacity is given iteratively, resulting in a strength capacity surface known as the interaction diagram. Such surfaces can be obtained through computational algorithms that, due to the constant updating and changes of national and international codes for desing of reinforced structures, it must be improved, expanded and in many cases redone. In this scenario, this paper presents a software project to calculate the load capacity and subsequent composition of interaction diagrams of reinforced concrete sections under axial force and biaxial bending. For this, UML diagrams will be presented for class design, highlighting the generalization of the proposal. The software is implemented in JAVA programming language according to the Object-Oriented Programming paradigm. Finally, some examples will be presented illustrating the software functionalities.

Palavras-chave: Biaxial Bending; Interaction Diagram; Stress Integration; Load Capacity; Design Charts; Constitutive Law; Reinforced Concrete; JAVA