On the Use of Vector-valued Intensity Measure to Predict Peak and Cumulative Demands of Steel Frames under Narrow-band Motions

摘要

In this study, various alternative vector-valued ground motion intensity measures (IMs) are used to estimate maximum inter-story drifts and hysteretic energy demands of steel framed buildings under long duration narrow-band ground motions. The vectors are based on the spectral acceleration at first mode of the structure as first parameter Sa(T_1). As the second parameter of the vector, IMs related to peak, integral and spectral shape parameters are selected. It is concluded that spectral-shape-based vector-valued IMs have the best relation with maximum inter-story drift and energy demands in steel frames subjected to narrow-band earthquake ground motions.