Computation of Axial Forces-Bending Moments Interaction Diagrams for Reinforced Concrete Polygonal Cross Sections
Palavras-chave:
Reinforced concrete, Ultimate, yielding and cracking interaction diagrams, Polygonal cross sectionsResumo
This study aimed to calculate the generalized stress (axial forces and bending moments) and their
respective interaction diagrams for reinforced concrete cross sections. Most of the approaches to compute the
generalize stress are restricted to particular cases, such as rectangular cross sections and simplified stress-strain
diagrams. The adopted methodology allows to calculate the generalized stress for any polygonal cross section, and
it is also flexible with respect to the choice of the stress-strain diagram of the materials. The main contribution of
the present study is to extend such methodology to calculate not only the ultimate axial forces-bending moments
interaction diagram, but also the interaction diagrams defined by the yielding of the reinforcements and cracking
of the concrete. Such diagrams are important in applications of non-linear analysis of reinforced concrete elements
by the lumped damage mechanics for the definition of yielding functions and evolution laws.
