Uniaxial stress-strain relationship of concrete confined by various shaped steel tubes

摘要

A method is presented to predict the complete stress-strain curve of concrete subjected to traxial compressive stresses caused by axial load plus lateral pressure due to the confinement action in circular, box and octagonal shaped concrete-filled steel tubes. Available empirical formulas are adopted to determine the lateral pressure exerted on concrete in circular concrete-filled steel Columns. To evaluate the lateral pressure exerted on the concrete on the concrete in box and octagonal shaped columns, FEM analysis is adopted With the help of a concrete-steel interaction model.