A ground motion selection and modification method capturing response spectrum characteristics and variability of scenario earthquakes

Earthquake ground motion variability is one of the primary sources of uncertainty in the assessment of the seismic performance of civil systems. The paper presents a novel method to select and modify ground motions to achieve specified response spectrum variability. The resulted ground motions capture the median, standard deviation and correlations of response spectra of an earthquake scenario conditioned on a specified earthquake magnitude, source-to-site distance, fault mechanism, site condition, etc.