Experimental Study on Bending Behavior of Cold-Rolled Deformed Steel Bars Reinforced Concrete Slabs

Abstract

Cold-rolled deformed bar with wing is a new type of cold-rolled deformed bar, it has high tensile strength and better ductility than the general cold-rolled deformed bars, and has good bonding properties with concrete. Five types of totally 15 full-scale specimens were tested to investigate the mechanical behavior, failure mode and the suitable value of minimum reinforcement ratio of concrete slab with cold-rolled deformed bar with wing. Experimental parameters include the reinforcement ratio, concrete strength, and reinforcement diameter. The deflection of mid-span, the strain of cold-rolled deformed bar and the crack width measured under each load level were studied. The test shows that the specimens with the reinforcement ratio of 0.15% present ductile failure, while those with the reinforcement ratio of 0.12% present brittle failure. Based on the results of the experiment, this paper suggests that the value of minimum reinforcement ratio of concrete slabs with cold-rolled deformed bar with wing could be 0.15%.