Pushover解析に基づく鋼構造体育館の動的靭性指標の評価

抄録

The present paper discusses on resistance capacity of steel school gymnasiums subjected to horizontal seismic motions in the span direction. First, based on elastic-plastic dynamic response analysis for its corresponding 3-D full model composed of parallel gable frames, both of the dynamic seismic performance index _dI_S and dynamic ductility index _dF are evaluated depending on various input level. As the main parameter of the structural performance, the critical plastic rotation angles θ_p^cr appearing at beam ends on column sides of the gable frame are analyzed to quantify the effects of the rotations on _dF and _dI_S. Second, the correspondence of the direct time history analysis to pushover analysis based on a capacity spectrum method is studied in detail with respect to some adjustment factors in order that pushover analysis using the factors provide affective and accurate results. And the validity and usefulness of the proposed pushover analysis using the adjustment factors is proved as a design tool for evaluating the important seismic indexes _dF and _dI_S.