A concrete stress-strain model for analysis of high strength reinforced concrete columns

A concrete stress-strain model for analysis of eccentrically loaded both short and slender high strength reinforced concrete columns is proposed in this paper. The mathematical model has been developed based on the test data to represent the complete nonlinear stress-strain relationship of high strength concrete ranging from 40 to 90 MPa. Several slender high strength concrete columns available in the literature have been analysed using both proposed nonlinear stress-strain model and the equivalent rectangular stress block model to confirm the reliability and validity of the proposed model. Good agreement has been achieved between the computed theoretical ultimate strength capacities and the test results of high strength concrete columns