Study on Fatigue Characteristics of Carbonation Erosion Prestressed Hollow Slabs in Whole Life Cycle

Table 10

The comparison of strain and deflection (before and after bonded steel reinforcement) under different load.

Before reinforcement					After reinforcement
Load (kN)	W-1/2 (mm)	W-1/4 (mm)	Y-1 (με)	Y-5 (με)	W-1/2 (mm)	W-1/4 (mm)	Y-1 (με)	Y-5 (με)
50	0.37	0.3	−89.05	86.1	0.31	0.24	−94.65	66.4
100	0.52	0.4	−217.75	153.9	0.50	0.35	−181.7	123.3
150	1.11	0.73	−288.75	215.5	0.69	0.58	−262.2	189.5

Note. W-1/2: midspan deflection, W-1/4: quarter span deflection value, Y-1: compressive strain at the top of the midspan, and Y-5: tension strain at the bottom of the midspan.