Abstract
Abstract: A procedure for estimation of frequency‐dependent strong motion duration (FDSMD) is developed. The proposed procedure utilizes the continuous wavelet transform and is based on the decomposition of the earthquake record into a number of component time histories (named “pseudo‐details”) with frequency content in a selected range. The “significant” strong motion duration of each pseudo‐detail is calculated based on the accumulation of the Arias intensity (AI). Finally, the FDSMD of the earthquake record in different frequency ranges is defined as the strong motion duration of the corresponding pseudo‐detail scaled by a weight factor that depends on the AI of each pseudo‐detail. The efficiency of this new strong motion definition as an intensity measure is evaluated using incremental dynamic analysis (IDA). The results obtained show that the proposed FDSMD influence the peak response of short‐period structures with stiffness and strength degradation.
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