Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets

By N. Attari, S. Amziane, M. Chemrouk. 2012

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Experimental study of flexural behaviour of RC beams strengthened by longitudinal and U-shaped basalt FRP sheet (2018, methodology): “[18] reported that the 57 use of twin-layer GFRP sheets was effective in beam strengthening, exhibiting 58 flexural capacity gains as high as 114%.”
Experimental investigation of the behaviour of concrete beams reinforced with GFRP bars under static and impact loading (2016, methodology): “FRP has been used extensively for strengthening structural components including the application of FRP sheets or plates as external reinforcement to the exterior surface of beams [1] and slabs [2].”
Properties and applications of FRP in strengthening RC structures: A review (2018, methodology): “[103] revealed the use of twin-layer CFRP–GFRP composite materials to RC beams increased the strength capacity by 114% compared with the control beam, but increases by 84% and 72% compared with the reference beam as reported by [91] Mehmet and Zarringol [63], respectively.”