Table 4.

The details and results tested flexural beams.

Group	Specimen	T, oC	Strengthening Position	CFRP Length, mm	Pu, kN	Δu, mm	εCFRP	εCFRP/εfu (%)
1	FB1T23-0-E	23	External	None	114.5	12.5	–	–
	FB1T23-400-E			400	130.7	14.1	5179	31
	FB1T23-600-E			600	140.5	14.9	5965	36
	FB1T23-800-E			800	156.6	16.0	6995	42
2	FB2T23-0-I	23	Internal	None	114.5	12.5	–	–
	FB2T23-400-I			400	139.0	15.3	6907	41
	FB2T23-600-I			600	169.2	17.9	9041	54
	FB2T23-800-I			800	202.1	20.8	12042	72
3	FB3T150-0-I	150		None	93.1	11.8	–	–
	FB3T150-400-I			400	109.9	13.2	5676	34
	FB3T150-600-I			600	134.4	14.7	7141	43
	FB3T150-800-I			800	166.3	17.0	8918	53
4	FB4T250-0-I	250		None	76.4	11.1	–	–
	FB4T250-400-I			400	91.2	12.1	4171	25
	FB4T250-600-I			600	110.2	13.3	5596	34
	FB4T250-800-I			800	135.8	15.8	7278	44
5	FB5T500-0-I	500		None	55.8	10.8	–	–
	FB5T500-400-I			400	70.7	11.4	3643	22
	FB5T500-600-I			600	87.1	12.0	5036	30
	FB5T500-800-I			800	103.6	12.8	6122	37

Note: P_u: Load at ultimate, Δ_u: Deflection at ultimate, T: Temperature, ε_CFRP is the CFRP strain and ε_fu is the CFRP ultimate strain of 16700 με.