Dimensionamento à flexão de vigas de seção transversal composta justaposta com ligação pregada via planilha eletrônica

Abstract

This work presents the development of an electronic spreadsheet for the flexural design of timber beams with simple and built-up cross-sections connected by nails, according to the criteria established by ABNT NBR 7190:2022. The tool contemplates simple beams, built-up beams composed of two members, and built-up beams composed of three members, considering the partial interaction between the elements through semi-rigid connections. The calculation procedure includes the determination of design resistances, normal and shear stresses, internal forces acting on the connectors, and the verification of instantaneous and final deflections. The validation of the tool was carried out through the comparison between analytically obtained results and those automatically generated by the spreadsheet, showing a high agreement between the methods, which confirms the consistency and reliability of the developed model.