The mechanical performance analysis of double-layer high-strength spiral stirrup confined concrete circular column under concentrated load

摘要

In order to study the mechanical performance of the double-layer high-strength spiral stirrup confined concrete circular column under axial compression load, based on the domestic and foreign scholars on the study of confined concrete, according to the test results, the finite element model of the double-layer high-strength spiral stirrup confined concrete circular column is simulated. Then the mechanical property of the high-strength spiral stirrup and concrete are analyzed. The results indicate that the simulation results are in good agreement with the test results. The double-layer high-strength spiral stirrup can restrain effectively horizontal deformation of reinforced concrete. The effective constraint has significant effect to improve the ultimate bearing capacity and ductility of reinforced concrete columns, and the results are inclined to safety. Therefore, the model can be used in nonlinear finite element analysis of the double-layer high-strength spiral stirrup confined concrete circular column.