Output details

Plastic Input Motion: Transformation for the Response of Yielding Oscillators

Most demand indices in earthquake engineering rely on quantities extracted from recorded ground motions. Establishing these quantities requires using whole duration of time history and traditionally does not consider yield strength or make distinction between intervals of elastic and inelastic response. Paper proposes new kind of excitation time-history, derived from recorded ground motion record and properties of single-degree-of-freedom yielding oscillator. Modified forcing term, termed "plastic input motion", is uniquely associated with development of plastic deformation. A procedure for applying method to general waveforms is provided.