Influencia en el comportamiento estructural de los nudos hibridos en edificios con losas steel deck y emparrillados mixtos

Abstract

The introduction of collaborating slabs or "steel deck" in Ecuador in the last decade, brought new construction techniques as the mixed grid of concrete beams with steel beams that cross and interrupt the concrete beam in the middle of the light and gives origin to a mixed knot. The performance of the beam and hybrid connection have not been fully studied, there is empiricism at constructive detail of a concrete beam-steel beam connection. Currently three types of knots are known: articulated, semi-rigid and rigid. In this classification, extreme cases represent ideal behavior: no stiffness in the first case, infinite in the last one, and an intermediate stiffness. This degree work has as objetive to know the influence of the independent variables (Hybrid know type, number of storeys and floor squareness) on the dependent variables (Bending moment, shear force and drift) in buildings with steel deck slabs and mixed grids, for this eight buildings are proposed, defined by the 2 3 factorial design, each considered as an experiment, which have interaction between the independent variables mentioned above. These experiments will be subjected to a statistical treatment with the objective to obtaining the p-value, which will accept or reject the hypotheses raised in the experiment design, to determine if the results are statistically significant. In buildings with secondary beams in one and two directions, the mechanical knot model significantly influenced the results of the dependent variables, moment, shear, and floor drift at the load combinations 1,2D + 1,6L and 1,2D + 1E + 1L.