コンクリート充填円形鋼管柱の弾塑性曲げ性状 : その1 拘束効果と残留応力の影響

抄録

In this paper, inelastic flexural behavior of concrete filled circular steel tubular columns is described. In order to obtain the flexural behavior more accurately, uniform bending tests were conducted in wide range of axial load ratio by using thirteen specimens, half of which were annealed to remove residual stresses, including two hollow tube specimens. Analytical methods for estimating bending moment capacity and moment-curvature relationships with taking account of confinement effects between steel tube and infilled concrete are proposed. Comparing the analytical results with the experimental results, influence of the confinement effects and residual stresses in steel tube on the flexural behavior is discussed.