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Structural Engineering and Mechanics
  Volume 14, Number 5, November 2002, pages 543-563

Seismic repair of reinforced concrete beam-column subassemblages of modern structures by epoxy injection technique
Tsonos AG

    The use of the epoxy pressure injection technique to rehabilitate reinforced concrete beam-column joints damaged by strong earthquakes is investigated experimentally and analytically. Two one-half-scale exterior beam-column joint specimens were exposed to reverse cyclic loading similar to that generated from strong earthquake ground motion, resulting in damage. Both specimens were typical of new structures and incorporated full seismic details in current building codes. Thus the first specimen was designed according to Eurocode 2 and Eurocode 8 and the second specimen was designed according to ACI-318 (1995) and ACI-ASCE Committee 352 (1985). The specimens were then repaired with an epoxy pressure injection technique. The repaired specimens were subjected to the same displacement history as that imposed on the original specimens. The results indicate that the epoxy pressure injection technique was effective in restoring the strength, stiffness and energy dissipation capacity of specimens representing a modem design.
Key Words
    beams (supports), columns (supports), earthquakes, epoxy resins, joints (functions), reinforced concrete, repairs
Aristotle Univ Thessaloniki, Sch Engn, Dept Civil Engn, Div Struct Engn, POB 482, GR-54006 Thessaloniki, Greece

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