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Table 3 Calibrated models of low cycle fatigue based on total strain amplitude for multiple slenderness ratios.

From: High-Strength Reinforcing Steel Bars: Low Cycle Fatigue Behavior Using RGB Methodology

Reinforcement grade

Slenderness ratio L/d

Equation

\(R^{2}\)

80 (550)

5

\(\epsilon _{a}=0.171(2N_{f})^{-0.497}\)

0.998

10

\(\epsilon _{a}=0.127(2N_{f})^{-0.490}\)

0.998

15

\(\epsilon _{a}=0.148(2N_{f})^{-0.573}\)

0.990