MECHANICAL BEHAVIOR OF COMPOSITE SLABS OF CERAMIC CONCRETE POST-POURED ON PRESTRESSED ORDINARY CONCRETE

摘要

Through the experiments of three simply supported and three continuous composite slabs, the mechanical behavior of such slabs made of ceramic concrete post-poured on precast prestressed concrete has been studied. These composite slabs have been compared with the prestressed composite slabs made of ordinary concrete with regard to ultimate strength, regularity of moment redistributions, deflection at service load, ductility of members and the shear strength at the interfaces. Test results show that the continuous composite slabs with lower level of prestressing can meet the requirement of serviceability limit state and have better ductility. There is no steel at the interface of precast and post-poured concrete, but enough shear strength exists between them.