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26 (a) Specimens F1, F2, F3 (b) Specimens F4, F5, F6 Figure 11. Load-midspan steel strain. effectively and reliably be used to determine flexural capacity of members with A1035 longitudinal reinforcement. Members reinforced with high-strength ASTM A1035 bars exhibit ade- Table 15. Ratio of peak strain to quate ductility and do not suggest any unexpected response target strain and maximum characteristics. concrete strain. Peak Strain/ Peak Concrete 2.4 Fatigue Performance of Specimen Target Strain Strain F1 2.46 0.0025 High-Strength Reinforcing Steel F2 2.07 0.0027 F3 3.14 0.0034 Fatigue is a process of progressive structural change in a F4 3.68 0.0038 material subjected to transient loads, stresses or strains. Fatigue F5 1.92 0.0039 strength is defined as the maximum transient stress range (S) F6 3.24 0.0033 that may be repeated without causing failure for a specified