Influência da espessura da placa de base na rigidez da ligação e no deslocamento da coluna em perfis I ou H submetidos à flexão composta com cisalhamento

Abstract

Base plates are responsible for the connection between steel columns and concrete foundations. It is intuitive that increasing the thickness of this element leads to an increase in stiffness and a decrease in rotation. This article aims to quantify this influence through a numerical simulation using the finite element method. To this end, two loading scenarios were applied to the connection: bending with tension (flexo-tension) and bending with compression (flexo-compression), both combined with shear force. Based on the Brazilian standard, in conjunction with international standards and published academic studies, and using software that employs the finite element method, an analysis of different thicknesses was carried out. The results showed a relative stiffness increase of up to 191%, which consequently led to a relative reduction in column displacement of up to 34%.