Evaluation of Shear Strength of RC Columns Strengthened by Concrete Jacketing
Reinforced concrete columns in existing multi-storeyed buildings may need to be strengthened to enhance the performance during an earthquake. An experimental study on strengthening of columns for shear by concrete jacketing is presented in this paper. 38 rectangular beam-column specimens were tested under monotonic single point lateral loading, in the presence or absence of axial load. The parameters considered for the study are compressive strength of jacket concrete, amounts of longitudinal and transverse reinforcements, thickness of jacket and level of axial load. The test programme, specimen details, test set-up and results in terms of the influence of the variation of each parameter on the shear strength of the specimens, are discussed in this paper.
KeywordsBuilding Column Concrete jacket Reinforced concrete Shear strength
- 1.Bett BJ, Klingner RE, Jirsa JO (1988) Lateral load response of strengthened and repaired reinforced concrete columns. ACI Struct J 85(5):499–508Google Scholar
- 3.Ersoy U, Tankut AT, Suleiman R (1993) Behaviour of jacketed columns. ACI Struct J 90(3):288–293Google Scholar
- 5.Gnanasekaran K (2008) Seismic retrofit of reinforced concrete columns in buildings using concrete jacket. Ph.D. thesis, Department of Civil Engineering, Indian Institute of Technology Madras, ChennaiGoogle Scholar
- 6.Hayashi T, Niwa H, Fukuhara M (1980) Strengthening methods of the existing reinforced concrete buildings. In: Proceedings, 7th world conference on earthquake engineering, Istanbul, Turkey, pp 89–97Google Scholar
- 7.Rodriguez M, Park R (1994) Seismic load tests on reinforced concrete columns strengthened by jacketing. ACI Struct J 91(2):150–159Google Scholar