実大鋼構造ラーメンの繰り返し載荷挙動に対して弾塑性数値解析がもつ予測精度 : 実大3層鋼構造骨組を用いた耐震性能実証実験

Abstract

This paper presents a study on the calibration of numerical inelastic analyses for the capacity of estimating the elastic stiffness and yield strength of multi-story steel moment frames and of tracing inelastic cyclic behavior of such frames. To this end, a set of test results obtained from a full-scale cyclic loading test applied to a three-story, two span by one span steel moment frame were used as the reference. Pushover analyses using nominal material strength were able to estimate the frame's elastic stiffness and yield strength very reasonably, with the degree of errors not greater than 5%. Analyses for cyclic loading to a drfit angle of 1/25 rad were also very accurate (with errors not greater than 4%) if appropriate values were adopted for strain hardening of individual columns, column-bases, panel-zones, and beams and for increase of strength by floor composite action. The fish-bone (generic frame) model traced the experimental behavior nearly as accurately as the original frame model.