DefinePK

Abstract

In this study, a calculation system in Maxima (GNU) was implemented, based on the numerical integration of the flexibility parameters to obtain the elements of a T-beam stiffness matrix with linear haunches including zones of infinite rigidity (rigid end off-sets) and shear/axial deformations. The length of these zones is assumed as half the width of the beam-column joint. The goal is to demonstrate that, an analysis based on the geometry between centroidal axes without considering joint stiffness, tends to exhibit greater flexural strength, overestimating the lateral deformations, which can be important when calculating the lateral displacement of frames. The flexural rigidity parameters of a T-beam with and without zones of infinite rigidity were determined through the calculation of the flexibility integrals using the three-point Gaussian quadrature rule of integration. Increases in stiffness (%) were determined when rigid end off-sets were considered.