一定軸力と変動曲げモーメントを受ける鉄骨鉄筋コンクリート断面の変形能力

Abstract

A numerical analysis is conducted on the moment-curvature relation of steel reinforcedconcrete column sections under constant axial load. Assuming piecewise-linear hysteretic, stress-strain relations for steel and concrete and using discrete element approach, the step-by-step incre-mental calculations show some interesting results that the ductility under repeated loading is muchless than that under monotonic loading, and that there exists some critical value of curvature ampli-tude for estimating the ductility. If the curvature amplitude is greater than its critical value, the moment capacity of the cross-section deteriorates considerably under repeated loading.