Inelastic spectra for displacement-based seismic design

In recognition of the emergence of displacement-based seismic design as a potentially more rational approach than force-based techniques, this paper addresses derivation of inelastic displacement spectra and associated topics. A well-constrained earthquake strong-motion data set is used to derive inelastic displacement spectra, displacement reduction factors and ductility-damping relationships. These are in a format amenable for use in design and assessment of structures with a wide range of response characteristics.