Retrofitting reinforced concrete beam-column joints by hydraulic displacement amplification damping system

Tracy Sau Kwai Chung, Siu Shu Eddie Lam, Bo Wu, You Lin Xu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)


In applications where structures are subjected to moderate earthquake or when small inter-story displacement are expected, the conventional usage of energy dissipation devices may not be suitable. In this paper, a hydraulic displacement amplification damping system (HDADS) is proposed to retrofit non-seismic reinforced concrete beam-column joints. HDADS is based on a group of hydraulic cylinders connected to fluid viscous dampers. Two 1/2 scale reinforced concrete beam-column joint specimens designed for gravity loads only and without seismic provisions were constructed. At the end of October 2006, the specimens were tested under reverse cyclic displacements at low frequencies. Based on the hysteresis responses of the specimens, performance of HDADS under repeated cyclic displacements were assessed. The experimental results indicate that HDADS is an effective and convenient energy dissipation system for the strengthening of reinforced concrete beam-column joints.
Original languageEnglish
Title of host publicationNew Horizons and Better Practices
Publication statusPublished - 1 Dec 2007
Event2007 Structures Congress: New Horizons and Better Practices - Long Beach, CA, United States
Duration: 16 May 200719 May 2007


Conference2007 Structures Congress: New Horizons and Better Practices
Country/TerritoryUnited States
CityLong Beach, CA

ASJC Scopus subject areas

  • Computer Science (miscellaneous)

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