Research Article

Test and Numerical Analysis on Damaged Steel Beam Strengthened with Prestressed CFRP Sheet

Table 1

Test matrix and results.

Specimen numberPrestressed degree (%Pu)Damaged level (%)Type of CFRPYield load of bottom flange Pt (kN)/(%Pu)Yield load of top flange Py (kN)/(%Pu)Ultimate load Pu (kN)Failure modes (CFRP sheet)

SB0050Not strengthened41/(30)95/(69.5)136.6—
CFSB11350Prestressed CFRP sheet53.1/(33.2)112.2/(70.1)160Some part debonding and rupture
CFSB2050CFRP sheet53.9/(34.1)104.5/(66.1)158.2Rupture
CFSB313100Prestressed CFRP sheet36.2/(35.8)71.2/(70.6)100.8Some part debonding