Stiffness and Crack Behavior of Unbonded Posttensioned Concrete Beam Strengthened with Aluminum Alloy Plate

Figure 6

The failure modes picture of the specimens: (a) SL1; (b) SL2; (c) SL3; (d) SS1; (e) SS2; (f) SS3.

(a)

(b)

(c)

(d)

(e)

(f)