The shear capacity of reinforced concrete T-beam strengthened with CFRP sheet can be significantly improved by anchorage device, and the shear effect (relative control beam) of the strengthened beam can be increased from 21.16% of U-shaped stirrups to 92.55%.

1) The shear capacity of reinforced concrete T-beam strengthened with carbon fiber fabric can be significantly improved by anchorage device, and the shear effect (relative control beam) of the strengthened beam can be increased from 21.16% of U-shaped stirrups to 92.55%.

2) The anchoring device can increase the maximum strain of CFRP from 5.675 *10-3 of U-shaped hoop to 16.058 *10-3.

3) Anchorage efficiency of different anchorage is obviously different. The four types of anchorage devices reported in this paper are fiber anchorage type I (FAI), fiber anchorage type II (FAII), embedded plate type I (EAI) and embedded plate type II (EAII). The anchorage efficiency is 4.54%, 40.12%, 46.02% and 58.37% respectively.

4) Based on the comparative study of different anchorage systems, a high-performance anchorage device (embedded plate type II) is developed, which can simultaneously realize the self-locking of fiber cloth and anchor plate itself in the concrete groove hole. The technical problem that fiber anchorage (type I, type II) needs overlapping force transmission between fiber cloth and anchorage device, which results in early failure of anchorage is solved.

5) The influence of the main diagonal crack angle on the strength model prediction is significant.