PSI - Issue 64

J.A.O. Barros et al. / Procedia Structural Integrity 64 (2024) 833–840 Barros et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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2. Experimental program 2.1. Group of beams, strengthening configurations, and procedures

The experimental program is formed by three beams, whose particularities are represented in Fig. 2: a reference beam (Ref) and two beams strengthened with three CutInov CFRP bars (3CI and 3CI_A) with the geometry indicated in Fig. 2. The unique difference between these two beams is that 3CI_A has fan-type CFRP anchors (S&P C-Anchor) close to the transition zone of the CutInov CFRP. The three beams have a flexural reinforcement ratio of 0.52% and a shear reinforcement ratio of 0.09%. BEAM | Ref 100 100 A BEAM | Ref 6Ø6 Section A A'

Section A A'

A

6Ø6 Stirrup Ø6

BEAM | Ref 100 400

100

Section A A'

A

6Ø6 Stirrup Ø6 2Ø10

300

300

250

300

300

150 300

300

300

250

300

300 300

150

220

100

100

400

4000

220 400

Stirrup Ø6 2Ø10

300

300

250

300

300

150 300

300

300

250

300

300 300

150

A'

400

4000

220 400

2Ø10

300

300

250

300

300

150 300

300

300

250

300

300 300

150

A'

4000

400

BEAM | 3CI

A'

Section BB'

a)

B

2Ø8 CutInov CFRP @ 380 mm from support

BEAM | 3CI

100

Section BB'

B

2Ø8 CutInov CFRP @ 380 mm from support

BEAM | 3CI 400

100

30

Section BB'

B

2Ø8 CutInov CFRP @ 380 mm from support 1Ø8 CutInov CFRP @ 780 mm from support

380

250 380

400

400

250

220

100

400

30

4000

220 400

1Ø8 CutInov CFRP @ 780 mm from support

380

250 380

400

400

250

B'

400

30

4000

220 400

1Ø8 CutInov CFRP @ 780 mm from support

380

250 380

400

400

250

B'

4000

400

b)

BEAM | 3CI_A

B'

Section CC'

C

Axis of symmetry

2Ø8 CutInov CFRP @ 380 mm from support

CutInov CFRP

BEAM | 3CI_A

100

Section CC'

C

Axis of symmetry

2Ø8 CutInov CFRP @ 380 mm from support 1Ø8 CutInov CFRP @ 780 mm from support

CutInov CFRP CFRP fan-type anchors CFRP fan-type anchors CFRP fan-type anchors CutInov CFRP

BEAM | 3CI_A 400

100

30

Section CC'

C

Axis of symmetry

2Ø8 CutInov CFRP @ 380 mm from support 1Ø8 CutInov CFRP @ 780 mm from support 4 CFRP fan-type anchors 2 @ 425 mm from support 2 @ 845 mm from support 1Ø8 CutInov CFRP @ 780 mm from support 4 CFRP fan-type anchors 2 @ 425 mm from support 2 @ 845 mm from support 4 CFRP fan-type anchors 2 @ 425 mm from support 2 @ 845 mm from support

250

380

355

220

100

400

30

45

45

220 400

250

380

355

C'

400

30

45

45

220 400

c)

250

380

355

C'

Fig. 2. Geometry of the beams, steel reinforcements, and strengthening configurations: a) reference beam (Ref); Strengthening beam b) without and with S&P C-Anchors close to the transition regions of CutInov reinforcements (3CI, 3CI_A). Note: All units are in [mm]. 400 45 45

C'

The geometry of the CutInov CFRP bars and the S&P C-Anchors are depicted in Fig. 3. The CutInov CFRP bars have a diameter of 8 mm and helical wrapping formed by Polyester fibres. The part of the CutInov CFRP bars applied according to the ETS technique has an inclination of 45° relative to the other part of these bars, which became disposed parallel to the longitudinal axis of the beam when applied to strengthen the beam.