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Structural Engineering and Mechanics
  Volume 71, Number 4, August25 2019, pages 341-350

Design procedure for seismic retrofit of RC beam-column joint using single diagonal haunch
Alireza Zabihi, Hing-Ho Tsang, Emad F. Gad and John L. Wilson

    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.
Key Words
    limited-ductile; RC frame; exterior beam-column joint; seismic retrofit; single diagonal haunch
Centre for Sustainable Infrastructure, Swinburne University of Technology, Melbourne, Australia

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