PSI - Issue 37

Jamal A. Abdalla et al. / Procedia Structural Integrity 37 (2022) 652–659 Abdalla et al./ Structural Integrity Procedia 00 (2021) 000 – 000

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ultimate load and corresponding deflection values.

0 10 20 30 40 50 60 70 80 90

0

10

20

30

40

50

CB1

B1W0

B2W1

B3W2

Fig. 4. Load-deflection relationships .

Table 7 describes the failure modes and Figure 5 shows the modes of failure of the four tested beams. The control beam failed in pure flexural failure (Fig. 5 (a)), while the beam without anchorage failed by delamination of the concrete cover (Fig. 5 (b)). The beam with one layer of CFRP U-Wrap anchors failed by plate de-bonding, while the specimen with two layers of CFRP U-wrap anchors failed by sheet de-bonding that was followed by plate de-bonding and finally flexural failure. It is evident that the use of anchors greatly influenced the mode of failure of RC beams strengthened with externally bonded AA plates.

(a) Control Beam – flexural failure

(b) B1W0 – cover delamination

(c) B2W1 – plate de-bonding

(d) B3W2 – wrap and plate de-bonding

Fig. 5. Failure Modes .