Elasto-plastic and post-buckling analysis was performed to trace the cyclic behavior of concrete-filled steel tubular (CFT) beam-columns, which had been tested previously. Analytical model to solve the deflections of the beam-column was divided into a number of elements, and the solution satisfying the equilibrium at each subdivision point was searched by the proposed way of combining the degrading type moment-curvature relation with the numerical integration scheme. The effect of local buckling of steel tube was taken into account by employing the degrading type of stress-strain relation. The paper first presents how to handle the deflection analysis of a member whose moment-curvature relation possesses the descending part, which is not possible by the conventional numerical integration, and discusses the accuracy of the solution compared with the test results.
雑誌名
Research reports of the Faculty of Engineering, Mie University
Analysis of Elasto-Plastic Behavior of Concrete-Filled Steel Tubular Beam-Columns Falling in Local Buckling
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