Experimental Study of Aged and Seriously Damaged RC Beams Strengthened Using CFRP Composites

Table 1

Test matrix.

Group	Specimen	Dimension and position of the CFRP sheet	Anchoring schemes	Greater than effective bond length	Beam side face strengthening
One	WE	Full span	No anchorage	Yes	No
	LEU	800 mm in the middle	U-shaped wraps	Yes	No
	WA	Full span (only CF anchors bonded with epoxy resin)	CF anchors	No	No
Two	WEA-S	Full span	CF anchors	Yes	Yes
	LEA-S	800 mm in the middle	CF anchors	Yes	Yes
	WPA-S	Full span (only 800 mm bonded with epoxy resin)	CF anchors	Yes	Yes
	LE-S	800 mm in the middle	No anchorage	Yes	Yes

L: local span strengthened with the CFRP sheet; W: whole span strengthened with the CFRP sheet; A: CFRP sheet fixed by CF anchors; U: U-shaped CFRP wraps as end anchorages; E: CFRP sheet bonded in the full span with epoxy; P: part of the CFRP sheet bonded in the beam span with epoxy resin; S: CFRP sheets were bonded onto the beam side faces.