A simplified evaluation method of skeleton curve for RC frame with URM infill

Kiwoong Jin, Ho Choi

Research output: Contribution to journalArticlepeer-review


In this paper, a simplified evaluation method of the skeleton curve for reinforced concrete (RC) frame with unreinforced masonry (URM) infill is proposed in a practical form, based on the previous studies. The backbone curve for RC boundary frame was modeled by a tri-linear envelope with cracking and yielding points. On the other hand, that of URM infill was modeled by representative characteristic points of cracking, maximum, and residual strength; also, the interaction effect between RC boundary frame and the infill was taken into account. The overall force-displacement envelopes by the sum of RC boundary frame and URM infill, where the backbone curves of the infill from other studies were also considered, were then compared with the previous experimental results. The simplified estimation results from this study were found to almost approximate the overall experimental results with conservative evaluations, and they showed much better agreement than the cases employing the infill envelopes from other studies.

Original languageEnglish
Pages (from-to)309-322
Number of pages14
JournalEarthquake and Structures
Issue number3
Publication statusPublished - 2017 Sept 1


  • ASCE41-06
  • Backbone curve
  • Diagonal strut mechanism
  • RC frame
  • URM infill

ASJC Scopus subject areas

  • Civil and Structural Engineering


Dive into the research topics of 'A simplified evaluation method of skeleton curve for RC frame with URM infill'. Together they form a unique fingerprint.

Cite this