Steel-Reinforced Grout (SRG) strengthening of shear-critical RC beams

•Nine shear critical RC beams where strengthened using SRG jacketing.•The effectiveness of U- and fully-wrapped SRG jackets was investigated.•Strength and deformation capacity increased up to 160% and 450%, respectively.•Digital Image Correlation confirmed the effectiveness of SRG jacketing.•Express...

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Bibliographic Details
Published in:Construction & building materials 2019-08, Vol.216, p.68-83
Main Authors: Thermou, G.E., Papanikolaou, V.K., Lioupis, C., Hajirasouliha, I.
Format: Article
Language:English
Subjects:
FRCM
Jackets
Mortar
RC beams
Shear
SRG
Steel fabric
Strengthening
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Summary:•Nine shear critical RC beams where strengthened using SRG jacketing.•The effectiveness of U- and fully-wrapped SRG jackets was investigated.•Strength and deformation capacity increased up to 160% and 450%, respectively.•Digital Image Correlation confirmed the effectiveness of SRG jacketing.•Expressions are proposed for estimating the effective strain of the SRG jacket. This paper investigates the effectiveness of Steel-Reinforced Grout (SRG) jackets to strengthen shear critical reinforced concrete (RC) beams. Eleven RC beams were tested in three-point bending. Key parameters of investigation were the strengthening configuration (U- and fully-wrapped jackets), the density of the fabric (1.57 and 4.72 cords/cm) and the number of the strengthening layers (one and two). The test results demonstrated the efficiency of SRG jacketing in increasing both strength (up to 160%) and deformation capacity (up to 450%) of the shear critical beams. Expressions are proposed for estimating the effective strain of the SRG jacket.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2019.04.259