SMALL SCALE TESTING OF SHEAR-BOND BEHAVIOR IN COMPOSITE DECK SLABS WITH PROFILED STEEL SHEETING

This study investigates the shear-bond behavior of composite deck slabs incorporating profiled steel sheeting through a series of small-scale push-off and pull-out tests. The experimental program evaluates the influence of mechanical interlock, friction, and embossment geometry on the interface performance between concrete and steel sheeting. Specimens were prepared using galvanized steel profiles and tested under varying vertical loads to simulate realistic shear conditions. The results demonstrate that re-entrant features and embossments significantly enhance shear resistance by preventing horizontal slip and vertical separation. Frictional coefficients were quantified, and failure mechanisms were observed to resemble those in full-scale slab tests. The findings provide critical insights for developing finite element models and optimizing composite slab design, offering a cost-effective alternative to full-scale testing.