Design procedure for seismic retrofit of RC beam-column joint using single diagonal haunch

  • Zabihi, Alireza (Centre for Sustainable Infrastructure, Swinburne University of Technology) ;
  • Tsang, Hing-Ho (Centre for Sustainable Infrastructure, Swinburne University of Technology) ;
  • Gad, Emad F. (Centre for Sustainable Infrastructure, Swinburne University of Technology) ;
  • Wilson, John L. (Centre for Sustainable Infrastructure, Swinburne University of Technology)
  • Received : 2019.02.20
  • Accepted : 2019.04.05
  • Published : 2019.08.25


Exterior beam-column joint is typically the weakest link in a limited-ductile reinforced concrete (RC) frame structure. The use of diagonal haunch element has been considered as a desirable seismic retrofit option for reducing the seismic demand at the joint. Previous research globally has focused on implementing double haunches, while the use of single haunch element as a less-invasive and more architecturally favorable retrofit option has not been investigated. In this paper, the key formulations and a design procedure for the single haunch system for retrofitting RC exterior beam-column joint are developed. An application of the proposed design procedure is then illustrated through a case study.


Supported by : Bushfire and Natural Hazards Cooperative Research Centre


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