Loading test for assessing bending behavior of composite steel deck-slabs of simple span according to SDI T-CD-2017 standard
In this study, two testing slabs in steel-concrete composite of simple span were cast in the laboratory with the scale 1:1 having real dimensions 4500 × 900 × 140 mm. The loading test according to the American standard SDI T-CD-2017 of Steel Deck Institute (US) was carried out on these slabs to control the bending behavior in the ultimate limit state and the service limit state. The results obtained in the limit state design show that the load-carrying capacity of two testing slabs is practically similar to the applied load at which debonding or a slip relative displacement between the steel decking and the concrete. This load value is equal to about 46.8%-53.8% of the ultimate load-carrying capacity corresponding to the failure of the testing slabs. In this case study, the disposition of negative reinforcements for composite steel deck-slabs of simple span affect slightly on the bending capacity. However, it is possible to use negative reinforcements in order to limit the concrete cracking on the composite steel deck-slabs in real working conditions.
Keywords: composite steel deck-slabs, simple span, ultimate load-carrying capacity, shear bond resistance, concrete craking.
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