Advances in Materials Science and Engineering

Research Article

Experimental Study on FRP-to-Concrete Bonded Joints with FRP Sheet Anchor System

Table 3

Ultimate bearing capacities of test specimens.


Specimens	Ultimate load	Failure mode	Average load	Increased load	Increased ratio	Unit load increased value
	(kN)		(kN)	(kN)	(%)	(kN)

W0L0-1	27.3	SD	29.2	—	—	—
W0L0-2	31.5	SD
W0L0-3	28.7	SD
W50-1	30.8	SD, SAD	31.2	2	6.85	2
W50-2	30.6	SD, SAD
W50-3	32.1	SD, SAD
W75-1	33.5	SD, SAD	34.1	4.9	16.78	3.3
W75-2	34.2	SD, SAD
W75-3	34.5	SD, SAD
W100 (L2)-1	33.3	SD, SAD	35.5	6.3	21.58	3.2(6.3)
W100 (L2)-2	36.3	SD, SAD
W100 (L2)-3	36.9	SD, SAD
W150-1	34.7	SD, AD	35	5.8	19.86	1.9
W150-2	35	SD, AD
W150-3	35.2	SD, AD
L1-1	29.4	SD, SAD	32.1	2.9	9.93	5.8
L1-2	35.3	SD, SAD
L1-3	31.7	SD, SAD
L3-1	38	SD, AD	37.7	8.5	29.11	5.7
L3-2	35.4	SD, AD
L3-3	39.7	SD, AD
L4-1	42.7	SD, AD	41.3	12.1	41.44	6.1
L4-2	37.8	SD, AD
L4-3	43.3	SD, AD

Note. W series: unit load increased value = increased load/(W_a/W_t) and L series: unit load increased value = increased load/(L_a/L_t), where W_a—the width of the CFRP sheet anchor; W_t—the width of the tensile sheet; L_a—the number of the CFRP sheet anchor layers; and L_t—the number of the longitudinal CFRP sheet. The unit load increased value of the W100 series was 3.2 kN. The unit load increased value of the L2 series was 6.3 kN. SD = sheet debonding; SR = sheet rupture; SAD = delamination between sheet and anchor sheet; AD = anchor sheet debonding.