ABSTRACT
The type II cold-rolled deformed steel bar is a new specially shaped high-strength steel product having good bonding performance with normal concrete, which will highly improve the mechanical performance of corresponding reinforced members. In this paper, the mechanical behaviours of concrete slabs reinforced by the steel bars are studied. Four three-meter-span single-way slabs were tested in the structural lab of Tongji University. Two of them are reinforced by general steel bars and the other two are reinforced by the type II cold-rolled deformed bars with the same steel ratio. The experimental results show superior property of thinner cracks, better ductility and higher limited bearing capacity of concrete slabs reinforced by this new type bars compared with those slabs reinforced by general steel bars. The test also shows that concrete slabs reinforced by the type II cold-rolled deformed steel bars may work well even if they have a smaller reinforcement ratio than the minimum requirement of Chinese Concrete Structure Standard. The numerical results using ANSYS show the elastic design of concrete members reinforced by the type II cold-rolled deformed bars can use the same method as general concrete members. The results in the paper can give some suggestion for the revision of Chinese Code for design of concrete structures.
