NEHRP Clearinghouse
- Title
- Behavior of Strengthened and Repaired Reinforced Concrete Columns under Cyclic Deformations.
- File
- PB87148177.pdf
- Author(s)
- Bett, B. J.; Klingner, R. E.; Jirsa, J. O.
- Source
- National Science Foundation, Washington, DC. Directorate for Engineering., December 1985, 84 p.
- Identifying Number(s)
- PMSFEL-85-3
- Abstract
- The behavior of strengthened and/or repaired reinforced concrete short columns under cyclic deformations was studied. Based on an 18-in. square prototype column, three column test specimens were constructed to two-thirds scale, using identical geometry and reinforcement. The original specimens had a 12-in. square cross section reinforced with eight no.6 longitudinal bars, sets of 6 mm ties spaced at 8 in., and 1 in. cover. Spacing of the transverse reinforcement, though greater than what would currently be specified, was intended to represent the practice of column design in seismic regions of the United States in the 1950s and 1960s. Two specimens were strengthened prior to testing. A single lateral displacement history was used for all tests. Constant axial load was applied. Both the strengthened and the repaired columns exhibited greater ductility than the original column.
- Keywords
- Maintenance; Reinforced concrete; Columns (Supports); Earthquake engineering; Concrete structures; Cyclic loads; Tests