Residual displacement ratios of SDOF systems subjected to ground motions recorded on soft soils

Duofa Ji, Weiping Wen, Changhai Zhai*, Evangelos I. Katsanos

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


120 earthquake ground motions recorded on soft soil sites were employed to assess, through response history analysis of simplified systems, the residual displacement demand, Cr, defined as the ratio of the residual displacement to the maximum elastic displacement. Single degree of freedom systems were considered and the lateral strength ratio was parametrized to account for varying structural inelasticity. Four hysteretic laws were chosen to represent degrading and non-degrading performance while variation in the post-yield stiffness was considered. The analysis scheme enabled assessing the relationship of the residual displacement with the aforementioned structural characteristics. The residual displacement demand was found to be sensitive in the post-yield stiffness ratio. An equation was finally introduced to accommodate the reliable estimation of residual displacement ratio, the latter being beneficial for evaluating the seismic performance of existing structures built on soft soil sites.
Original languageEnglish
JournalSoil Dynamics and Earthquake Engineering
Pages (from-to)331-335
Publication statusPublished - 2018


  • Lateral strength ratio
  • Residual displacement ratio
  • Response history analysis
  • Single degree of freedom systems
  • Soft soil sites


Dive into the research topics of 'Residual displacement ratios of SDOF systems subjected to ground motions recorded on soft soils'. Together they form a unique fingerprint.

Cite this