PSI - Issue 64

Maher AL-Hawarneh et al. / Procedia Structural Integrity 64 (2024) 1103–1110 Maher AL-Hawarneh,Moustafa Mansour, Ahmad Rteil/ Structural Integrity Procedia 00 (2019) 000 – 000

1108

6

Fig. 5. Stress vs Strain uni-directional 1-layer FRCM 55 MPa specimens with control specimens

The uni-directional specimens with 2 layers of FRCM showed a similar effect on the compressive strength as the 1-layer specimens, where the increase for the 2 layers specimens were 25%, 11% and 34%, with an average increase of around 23% compared to that for the control specimens. Unlike the 1-layer specimens, the 2-layer specimens showed a significant increase in the concrete maximum strain achieved at failure due to FRCM confinement (Fig.6).

Fig. 6. Stress vs Strain uni-directional 2-layer FRCM 55 MPa specimens with control specimens

Table 3: Summary of the FRCM effect on the compressive strength of the 30MPa concrete specimens

Peak compressive strength

30 MPa

Specimen

Strength gain (MPa)

Strength gain (%)

- - -

- - -

30-0#1 30-0#2

27.7 32.3 30.0 32.5 30.0 31.3 34.6 40.6 37.6 36.0 37.0 36.5

Control

Avg

30-1-B#1 30-1-B#2

2.6 0.1 1.3 4.6 7.6 6.0 7.0 6.5

8.6 0.2 4.4

Bi-directional (1 layer)

avg

30-1-U#1 30-1-U#3

15.5 35.4 25.5 20.1 23.4 21.7

Uni-directional (1 layer)

10.6

Avg

30-2-U#1 30-2-U#3

Uni-directional (2 layers)

avg