Repairing of Shear-Damaged RC Joint Panel Zone Using Chemical Epoxy Injection Methodology

Abstract eng:
In this experimental study, the effectiveness of epoxy-injection repair methodology applied to a full-scale, T-shaped beam-column joint specimen was investigated. One full-scale reinforced concrete beam-column joint specimen was designed and built according to the old construction practice and previous Turkish Earthquake Code (TDY-75) with no seismic provisions including smooth reinforcing bars, inadequate transverse reinforcement, and low concrete compressive strength. The beam-column joint was subjected to a reversed cyclic lateral load and a constant axial load equivalent to forty percent of its maximum axial load capacity. The specimen experienced pure shear failure due to the large shear deformation in the joint region. The damaged specimen was then repaired using epoxy-injection technique to seal the large shear cracks and was tested again under the same loading condition. Although, the shear failure was observed again, the Lateral load capacity and consequently the shear capacity was enhanced significantly.

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