ABSTRACT
This paper verified the structural behavior of three configurations of composite beams of wood and steel profiles, analytically by the mixed section homogenization method (MHSM), by experimental tests and simulated by the finite element method (FEM). Unreinforced wooden beam (V-SR), with bent steel sheet profiles fixed with stud (V-PRI) and self-tapping (V-AUT) screws were analyzed. The flexural behavior was analyzed by 3 points of these elements, represented by the load and displacement. It was found that the beam failure form was the same in all configurations, occurring in the tensioned part, without lateral buckling of the steel profiles or plastic deformation of the screws. It was noted that the insertion of steel profiles caused an increase in the strength of the composite beams, being 100% in the V-PRI sample and 32% in the V-AUT. The FEM simulations showed values closer to the bending behavior of the V-SR and V-PRI beams in the elastic regime (ELS). The experimental results of the V-AUT beams were more compatible with the mixed section homogenization model.
Keywords
beams; mixed structures; computer simulation; wood; metallic reinforcement