Abstract
Recently, the authors proposed an analytical model based on decaying sinusoids for near-fault ground motion velocity pulses. This pulse model is used to investigate relations between strength reduction factor and ductility demand of inelastic structures subject to near-fault ground motions. It is shown that pulse ductility demand and pulse strength reduction factors match well with those of actual ground motions for which the pulse approximation has been obtained. It is found that the ratio of the period of structures to that of the velocity pulses, T/T g , and the decaying factor for ground motion pulses, ζ g , determine the strength reduction factor for constant ductility demand.
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