A discussion on the article by Quinde et al. is presented. The methodology introduced by the authors is based on residual displacements computed from the inelastic response of elastoplastic single-degree-of-freedom systems subjected to synthetic ground motions representative of those recorded at soft soil sites in Mexico City. While the subject to the article is pertinent for post-earthquake assessment, this discussion points out and clarifies several issues about residual displacement demands and their estimation based on previously published investigations by the discussers.
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