Deformation Behavior of 300 mm Depth Deep Deck Plate Under Construction Loads

In this study, full-scale mock-up tests were conducted to evaluate the deformation behavior of a newly developed deep deck plate with a depth of 300 mm for construction loads. Test parameters were the thickness of the deck plate, span length, use of shoring, and type of loading (in-situ sand and concrete loading). The measured deflections of the deck plates were compared with the calculated deflections. In the sand loading test, the maximum deflection at the final load (6.24 kN/m²) was 27.6 mm for 1.1 mm thick deck plates with a 6.6 m span, and 44.4 mm for 1.4 mm thick deck plates with an 8.4 m span. In the concrete loading test, after casting a 130 mm topping concrete (4.87 kN/m²), the final net deflection was 22.2 mm (L/275) for a 6.6 m span and 40.9 mm (L/193) for an 8.4 m span. The measured deflections were 0.95 to 1.29 times larger than the calculated deflections using the effective moment of inertia according to AISI S100-16. The net deflection under construction load was less than L/180, and the total deflection limit of 20 mm could be met by introducing camber. Measured strains showed that the deck plates remained within the elastic range even at the final load step, indicating that the deflection caused by the construction loads can be assumed to be recoverable.