Flexural Strengthening of Beams and Slabs - Strengthening Design of Reinforced Concrete with FRP - page 147

4.5 m 5.0 m

FIGURE 5.P.6

Problem 5.11
Al-Tamimi et al. (2011) have designed, built, strengthened, and tested the beam
shown in Figure 5.P.7 (B85P). It has a CFRP plate extending 1,521 mm along the
span of the beam covering 85% of the shear span. ReCon Plate CFL Grade CF210,
100-mm wide by 1.4-mm thick, was used to strengthen the beam ( f * fu = 2500 MPa,
E f = 215 GPa). The average measured compressive strength of the concrete was 54
MPa. The modulus of elasticity and yield strength for the tensile steel reinforcement
were 202 GPa and 611 MPa, respectively. Determine the capacity of the beam using
the FIB model for cover delamination. Compare the ultimate load predicted to the
experimental ultimate load at cover delamination of 60.7 kN and conclude.

2 Φ 10 mm

70 mm

70 mm

100 mm Closed tie

Φ 8 mm@ 80 mm C-C

Φ 8 mm@ 80 mm C-C

a

155 mm

180 mm

10 sp. @ 80 mm = 800 mm

10 sp. @ 80 mm = 800 mm

110 mm

a

2 Φ 10 mm

Section a-a

1840 mm

(a) Longitudinal and cross-section reinforcement details of the beam

P

a = 561.5 mm 567 mm a = 561.5 mm

d = 155 mm

1690 mm

75 mm 75 mm

(b) Details of Tested Beams

FIGURE 5.P.7