Experimental study on the behavior of eccentrically compressed reinforced concrete columns strengthened with CFRP composite sheets

  • Trung Hieu Nguyen Faculty of Building and Industrial Construction, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Xuan Dat Pham Faculty of Building and Industrial Construction, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Khuong Duy Tran Faculty of Post-Graduate Studies, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
Keywords: CFRP sheets, confinement, eccentricity, curvature, ductility

Abstract

Strengthening of reinforced concrete (RC) columns is needed when the actual load-carrying capacity of the columns does not reach the required level due to either structural deterioration or increasing acting loads. This experimental study aims to evaluate the strengthening effect on the eccentrically-compressed RC columns using Carbon fiber reinforced polymer (CFRP) sheets, that confine around the column cross-section. Three RC column specimens with the same geometrical dimensions, reinforcement detailing, and concrete compressive strength were cast and tested in the current experimental investigation. One RC column without being strengthened is referred as the control specimen whereas two other RC columns were partially strengthened by CFRP sheets. All three RC columns were axially loaded with the same initial eccentricity e0 of 80 mm. Based on the test results such as the ultimate load-carrying capacity, the load-rotation relationship, and load-curvature at the middle of column height, the effectiveness of the strengthening technique is discussed.

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Published
31-10-2021
How to Cite
Nguyen, T. H., Pham, X. D., & Tran, K. D. (2021). Experimental study on the behavior of eccentrically compressed reinforced concrete columns strengthened with CFRP composite sheets. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 15(4), 172-181. https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-15
Section
Research Papers