Prestress Loss of CFL in a Prestressing Process for Strengthening RC Beams

Table 2

Prestress loss by predictions and measurements during tension.

Specimens	Prestress levels/%	/mm	Predicted prestress loss/MPa	Measured prestress loss/MPa	Relative errors/%
PB-8	8	0.4	34.28	33.17	1.033
PB-15	15	0.6	51.43	50.16	1.025
PB-22	22	0.8	69.57	68.66	1.013

Note. PB-8 are prestressed-CFL-strengthened RC beams with 8% prestress level.