Behavior of Strengthened Composite Prestressed Concrete Girders under Static and Repeated Loading

Table 6

Summary of test results for girders G2 and P2.

Test results	Girder G2	G2/G1, %	Girder P2	P2/P1, %	P2/G2, %
Mcr, kN·m	1096	101	1255	98.4	114.5
Δcr, mm	32	100	44	104.8	137.5
My, kN·m	1639	96.6	2104	98.6	128.4
Δy, mm	113	117.7	136	147.8	120.4
Mu, kN·m	1834	93.1	2128	91.5	116.0
Δu, mm	163	87.6	153	92.7	93.9
Residual deflection, mm	119	129.3	91	116.7	76.6
Ductility index, Δu/Δy	1.44	74.2	1.13	63.1	78.5
Δ at service load level (70% of ultimate load), mm^#	65	180	61	191	93.8

Total absolute measured downward net deflection, ^#net deflection after subtracting camber value.