2層Z型NCブレース架構の地震応答性状に関する研究

抄録

The authors have carried out an investigation aimed at establishing an earthquake resistant design method for a Z-type NC braced frame. Our previous papers demonstrated the seismic performance of a single-story braced frame, and this paper clarifies the performance of a two-story braced frame from results of both shaking table tests on two-story braced frame specimens and of earthquake response analyses on actual-scale numerical models. It is concluded that elastic strain energy accumulation due to incremental story deformation angle can reduce absolute acceleration response. Furthermore, deformation behavior can be controlled by a brace arrangement and residual deformation after an earthquake can be predicted accurately.