Prediction of Load-Displacement Curve of High-Strength Concrete Columns under Simulated Seismic Loading

摘要

This paper presents an analytical method for the prediction of load-flexural deformation curve of reinforced concrete columns subjected to simulated seismic loading. The method is based on a finite element approach which allows for the spreading of inelasticity along the member. The effect of lateral confinement by transverse reinforcement is included in the uniaxial stress-strain relations of confined core concrete. The effect of the configuration of transverse steel and the presence of strain gradient on confinement effectiveness is considered by introducing Wo confinement effectiveness factors in the stress-strain model of confined high-strength concrete. The influence of the difference between plastic hinge length assumed in the analysis and the gauge length used in the measurement of stress-strain relations of concrete is also considered in the analysis. The accuracy of predictions of the method has been verified by comparing the hysteretic load deformation curves obtained from the computer program with the experimental results published in the literature.