A drift capacity prediction model for retrofitted reinforced concrete columns

Date

2022-03-01

Author

ÖZCAN, OKAN
Binici, Barış

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Seismic assessment of reinforced concrete (RC) buildings heavily relies on the deformation capacity predictions of members. Similarly, the prediction of the deformation capacity of retrofitted RC columns has the utmost importance for seismic retrofit design. In this paper, a new unified drift model is proposed in order to estimate the rotation capacity of RC columns retrofitted with concrete jacketing, steel jacketing and fibre-reinforced polymer (FRP) wrapping. In order to generate the model, an extensive database was compiled consisting of 269 columns composed of 39 concrete-jacketed, 91 steel-jacketed and 139 FRP-wrapped RC columns failing in flexure mode. In the proposed drift model, the key model parameters are the confinement stress ratio, the axial load ratio and the lap splice length. The accuracy and scatter of the estimations with regard to the previous models were studied. For all of the column retrofitting options, the proposed unified model was observed to have rotation predictions better than the previous models in terms of the mean of the predicted to experimental rotation capacity ratios and with a reduced standard deviation.

Subject Keywords

composite materials, failure, modelling, STRENGTHENED RC COLUMNS, SEISMIC BEHAVIOR, BRIDGE COLUMNS, REPAIR, PERFORMANCE, POLYMER, FRP

URI

https://hdl.handle.net/11511/96035

Journal

MAGAZINE OF CONCRETE RESEARCH

DOI

https://doi.org/10.1680/jmacr.19.00553

Collections

Department of Civil Engineering, Article

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Citation Formats

O. ÖZCAN and B. Binici, “A drift capacity prediction model for retrofitted reinforced concrete columns,” MAGAZINE OF CONCRETE RESEARCH, vol. 74, no. 5, pp. 236–250, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96035.