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A platform for research: civil engineering, architecture and urbanism
Rehabilitation of Reinforced Concrete Circular Columns with Sprayed-Glass Fiber–Reinforced Polymer Composites
The seismic behavior of reinforced concrete (RC) circular columns rehabilitated with sprayed-glass fiber–reinforced polymer (GFRP) composites was investigated in this study. Six large-scale RC circular columns were constructed and tested under simultaneous reversed-cyclic lateral loads and a constant axial load. All columns had a diameter of 305 mm with 1,525-mm shear span and were deficient in lap-splice length at the footing-column joint. The six specimens were divided into two identical series. In each series, one specimen was rehabilitated after being fully damaged, one was rehabilitated after being partially damaged (up to 2.5% drift ratio), and one was strengthened without prior loading. The difference between the two series was the thickness of the sprayed-GFRP confinement: 3.0 and 6.0 mm. It was concluded that the 3-mm-thick sprayed GFRP was inadequate for rehabilitation of the fully damaged column; however, it can be used for the rehabilitation of undamaged and partially damaged columns. Sprayed GFRP of 6-mm thickness not only increased the drift capacity of the column but also significantly increased the lateral load capacity of seismically deficient RC circular columns.
Rehabilitation of Reinforced Concrete Circular Columns with Sprayed-Glass Fiber–Reinforced Polymer Composites
The seismic behavior of reinforced concrete (RC) circular columns rehabilitated with sprayed-glass fiber–reinforced polymer (GFRP) composites was investigated in this study. Six large-scale RC circular columns were constructed and tested under simultaneous reversed-cyclic lateral loads and a constant axial load. All columns had a diameter of 305 mm with 1,525-mm shear span and were deficient in lap-splice length at the footing-column joint. The six specimens were divided into two identical series. In each series, one specimen was rehabilitated after being fully damaged, one was rehabilitated after being partially damaged (up to 2.5% drift ratio), and one was strengthened without prior loading. The difference between the two series was the thickness of the sprayed-GFRP confinement: 3.0 and 6.0 mm. It was concluded that the 3-mm-thick sprayed GFRP was inadequate for rehabilitation of the fully damaged column; however, it can be used for the rehabilitation of undamaged and partially damaged columns. Sprayed GFRP of 6-mm thickness not only increased the drift capacity of the column but also significantly increased the lateral load capacity of seismically deficient RC circular columns.
Rehabilitation of Reinforced Concrete Circular Columns with Sprayed-Glass Fiber–Reinforced Polymer Composites
Mohit, Syed Abdullah (author) / El-Salakawy, Ehab (author)
2019-08-28
Article (Journal)
Electronic Resource
Unknown
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