/ / / Tab 5

Research Article

# Experiment on Natural Frequency Change of Reinforced Concrete Members under Low Cycle Loading

## Table 5

Frequency change equations and damage rate equations of test members.
 Specimen category Equation Frequency change equation Damage rate equation A = 30 mm Z-1 (T = 1.875 s) ω = 0.0027N2 − 0.5725N + 78.079 V = 2 ∗ 0.0027N − 0.5725 Z-2 (T = 2.4 s) ω = 0.0009N2 − 0.2582N + 78.747 V = 2 ∗ 0.0009N − 0.2582 Z-3 (T = 3.0 s) ω = −0.0024N2 − 0.2918N + 80.029 V = 2 ∗ (−0.0024)N − 0.2918 J-1 (T = 1.875 s) ω = 0.0051N2 − 0.7685N + 82.852 V = 2 ∗ 0.0051N − 0.7685 J-2 (T = 2.4 s) ω = 0.0012N2 − 0.2823N + 85.962 V = 2 ∗ 0.0012N − 0.2823 J-3 (T = 3.0 s) ω = 0.0064N2 − 0.9811N + 86.278 V = 2 ∗ 0.0064N − 0.9811 M-1 (T = 1.875 s) ω = 0.005N2 − 0.873N + 88.11 V=2 ∗ 0.005N − 0.873 M-2 (T = 2.4 s) ω = 0.001N2 − 0.225N + 96.91 V = 2 ∗ 0.001N − 0.225 M-3(T = 3.0 s) ω = 0.002N2 − 0.386N + 92.10 V = 2 ∗ 0.002N − 0.386 A = 24 mm Z-4 (T = 1.875 s) ω = 0.003 N2 − 0.341N + 88.40 V = 2 ∗ 0.003N − 0.341 Z-5 (T = 2.4 s) ω = 0.002 N2 − 0.264N + 85.62 V = 2 ∗ 0.002N − 0.264 Z-6 (T = 3.0 s) ω = 0.014N2 − 0.877N + 90.20 V = 2 ∗ 0.0014N − 0.877 J-4 (T = 1.875 s) ω = 0.0078N2 − 1.2601N + 95.533 V = 2 ∗ 0.0078N − 1.2601 J-5 (T = 2.4 s) ω = 0.0018N2 − 0.3531N + 97.122 V = 2 ∗ 0.0018N − 0.3531 J-6 (T = 3.0 s) ω = 0.0015N2 − 0.286N + 96.913 V = 2 ∗ 0.0015N − 0.286 M-4 (T = 1.875 s) ω = 0.001N2 − 0.238N + 102.5 V = 2 ∗ 0.001N − 0.238 M-5 (T = 2.4 s) ω = 0.001N2 − 0.239N + 109.0 V = 2 ∗ 0.001N − 0.239 M-6 (T = 3.0 s) ω = 0.001N2 − 0.214N + 106.6 V = 2 ∗ 0.001N − 0.214 A = 18 mm Z-7 (T = 1.875 s) ω = 0.0015N2 − 0.2305N + 101.74 V = 2 ∗ 0.0015N − 0.2305 Z-8 (T = 2.4 s) ω = 0.0015N2 − 0.2532N + 99.158 V = 2 ∗ 0.0015N − 0.2532 Z-9 (T = 3.0 s) ω = 0.0009N2 − 0.1555N + 97.336 V = 2 ∗ 0.0009N − 0.1555 J-7 (T = 1.875 s) ω = 0.0012N2 − 0.2003N + 98.11 V = 2 ∗ 0.0012N − 0.2003 J-8 (T = 2.4 s) ω = 0.0011N2 − 0.255N + 87.926 V = 2 ∗ 0.0011N − 0.255 J-9 (T = 3.0 s) ω = 0.0019N2 − 0.3883N + 86.874 V = 2 ∗ 0.0019N − 0.3883 M-7 (T = 1.875 s) ω = 0.001N2 − 0.204N + 116.3 V = 2 ∗ 0.001N − 0.204 M-8 (T = 2.4 s) ω = 0.001N2 − 0.216N + 115.2 V = 2 ∗ 0.001N − 0.216 M-9 (T = 3.0 s) ω = 0.001N2 − 0.222N + 113.5 V = 2 ∗ 0.001N − 0.222

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