Use of Slab composite with galvanized steel deck in reinforced concrete frame

Abstract

Slabs composite with galvanized steel deck and in-situ concrete are commonly used in steel framed structures. This approach proven to reduce structural weight and increase the efficiency of structural design. Furthermore, the steel deck acts as permanent formwork and also as positive reinforcement after concrete hardening. The study reported in this paper concentrates on the use of composite slab with galvanized steel deck in reinforced concrete (RC) framed buildings. This requires the assessment of the system under flexural loads and slip forces that develops between the RC beam and the composite slab in shear transferring zone. Four-point static and push-off tests were used to find the flexural capacity of system and the amount of slip between the beam and the slabs. Results of the numerous experimental tests and analytical studies demonstrate that the composite slab can be implemented in RC frames since both composite beam flanges and RC beam flanges conducted by the same beam stem manifested almost the same flexural behavior and had roughly similar load-carrying capacity in static test. Moreover, no slip was developed between the RC beam and the composite slab in all four test cases with different reinforcement set up. This can be considered as an important advantage of this system.