Behavior of Reinforced Concrete Beams with 700 MPa High-Strength Reinforcement – Flexure and Serviceability

Using high-strength reinforcement could provide various benefits to construction industry; material and cost savings, reduction of rebar congestion, and efficient use of high-strength concrete. However, the value of reinforcing steel’s yield strength allowed in Korean design codes was limited to being no greater than 600 MPa. Thus it needs to increase the maximum allowable yield strength value in order to use 700 MPa high-strength rebars in Korean construction field. The objective of this research was the investigation of flexure and serviceability of beams reinforced with the high- strength steels. The performance of RC flexural beams designed according to the current KCI design code with 700 MPa high-strength steels would be evaluated by experiments and structural analysis. By analysing the results of the studies, this research would lead to revision recommendations of the KCI design codes to increase reinforcing steel’s maximum design yield strength to 700 MPa.