Statistical analysis of ensembles of strong motion records

摘要

Spatial variations of strong motion are generally studied in terms of attenuation laws for peak ground accelerations with reference to the epicentre, located from long distance records. The question arises, how a set of strong motion records obtained from arbitrarily located stations are inter-related among themselves and with the epicentre. To answer this question, a new approach is proposed in this paper by determining, a force centre statistically from the set of recorded accelerograms.