DETERMINATION OF STRENGTH OF A COMPOSITE SLAB SYSTEM OF STEEL AND CONCRETE BY SEMI-EMPIRICAL M-K METHOD

Resumo

In this work the results of an experimental study of the behavior and strength of a composite
slab system, after the cure of the concrete, are presented. The steel deck consists of trapezoidal profile
with embossments in V-shape. Tests were carried out on a series of twelve composite slab models,
simply supported, submitted to bending. Different thicknesses of the steel deck, heights of composite
slabs and shear spans, were employed in the manufacturing of the models, according the EN 1994-1-
1:2004 and ANSI/ASCE 3-91:1992. During the tests deflections, end slips and strains of the steel
decks were measured, allowing the analysis of the behavior of the composite slab system and the
determination of its failure mode. The semi empirical “m-k” method, according ABNT NBR
8800:2008, were used for the determination of the longitudinal shear strength of the composite slab
system of steel and concrete. In order to illustrate the use of the longitudinal shear strength obtained by
the m-k method, an example of practical application will be made.