Flexural Behavior of RCC Beam Using Confined Reinforcement with Helical Stirrups

In the present condition the cost of construction goes on increasing due to usage of steel. In order to improve the tensile strength in concrete and reducing the usage of steel, a new type of reinforcement is essential for making an economical building. The main objective of our project is to reduce the usage of steel by providing helical stirrups in the reinforcement recommended as per IS 456:2000. By this method of reinforcement, we can achieve flexure in reinforced concrete beams which opposes conventional method of reducing the neutral axis depth of the beam. The under reinforced section of the beam can be achieved by this method of helical stirrups in the reinforcement. Steel is introduced in the tension zone to take the tensile stress, but as strength of concrete is ignored in tension zone with respect to compression zone. The objective of this research is to investigate the behavior of singly, doubly and confined reinforced beams. Ultimate load, deflection load, compressive stresses and tensile stresses were compared with the controlled plain reinforced helical stirrups beams. Single and double reinforced concrete beams were cast and tested for this purpose of investigation. The results obtained have indicated that enhanced the strength of concrete.