Abstract
In cold-formed steel-deck concrete composite slab systems, there are quite few theoretical and experimental studies on seismic in-plane shear transfer mechanism of composite floor slabs having bottomless trench ducts for cellular raceway systems. Herein, experimental studies are conducted by using fourteen different full-scale test specimens with and without a bottomless trench duct. During the test, alternately repeated in-plane lateral forces are applied to all the specimens on the laboratory test floor, and complete hysteresis loops for load and deformation relations are obtained. Test results indicate that the composite floor slabs with a bottomless trench duct have adequate initial stiffness and strength in case when the steel-decks are sufficiently welded onto the steel supporting girders.
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