CQC and SRSS methods for non‐classically damped structures

R. Sinha, T. Igusa

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


Two mode combination methods are presented for structures with non‐classical (non‐proportional) damping. They are of the same level of complexity as the well‐known SRSS and CQC methods. They require only a single, real‐valued participation factor for each mode, a single correlation coefficient, and standard relative displacement response spectra. A base‐isolation study shows that the standard SRSS and CQC methods for classically damped structures give under‐conservative response predictions, and that the proposed methods give accurate predictions.

Original languageEnglish (US)
Pages (from-to)615-619
Number of pages5
JournalEarthquake Engineering & Structural Dynamics
Issue number4
StatePublished - Apr 1995
Externally publishedYes

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)


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