塑性率を損傷評価の指標とする機械設備の地震PRAにおける地震動強さの指標の検討

抄録

This study tries to evaluate the applicability of four candidate indices, those are JMA Instrumental Seismic Intensity, Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV) and Standardized CAV, as Earthquake Hazard Index in the Seismic Probabilistic Risk Analysis (PRA) of mechanical components. As results of parametric elastoplastic earthquake response analyses of one-degree-of-freedom system with bi-linear load-deflection model against 60 near-field earthquake motions selected from NIED's K-NET and KiK-net observed earthquake motion data base in Japan, the correlation between those four indices and Ductility Factor (as Damage Assessment Index) reveals that the index A_JMA, based on JMA Instrumental Seismic Intensity, has similar characteristics with PGV and suggests to be most promising one in the seismic capacity evaluations of mechanical features made by ductile materials.