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

Table 1

Properties of specimens.

No.	Cross-sectional area (mm × mm)	Steel reinforcements	Steel strand
SL1	200 × 400	2C12	1A^S17.8
SL2	200 × 400	2C18	1A^S17.8
SL3	200 × 400	2C25	1A^S17.8
SS1	200 × 300	2C12	1A^S17.8
SS2	200 × 300	2C18	1A^S17.8
SS3	200 × 300	2C22	1A^S17.8