Rate-Independent Linear Damping for the Improved Seismic Performance of Inter-Story Isolated Structures

Ashkan Keivan, Ruiyang Zhang, Darioush Keivan, Brian M. Phillips, Masahiro Ikenaga, Kohju Ikago

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this study, rate-independent linear damping (RILD) is proposed for the seismic protection of inter-story isolated structures. For practical applications, the RILD force is approximated using a causal algorithm and then tracked using semi-active control. Both numerical simulation and shake table real-time hybrid simulation (RTHS) are used to study a 14-story inter-story isolated structure. First, the causal approximation of RILD evaluated in RTHS is compared to numerical simulation. Second, the benefits of RILD for inter-story isolated structures are demonstrated as compared to conventional damping. RILD offers an attractive control alternative by restricting isolation layer displacements without amplifying accelerations.

Original languageEnglish
Pages (from-to)793-816
Number of pages24
JournalJournal of Earthquake Engineering
Issue number2
Publication statusPublished - 2022
Externally publishedYes


  • Rate-independent linear damping
  • inter-story isolation
  • real-time hybrid simulation
  • semi-active control
  • shake table testing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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