Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members

<div>D<sub>E<i>k</i></sub>-<i>n</i><sub><i>k</i></sub> relations for specimens S1 to S9: (a) S1, S2, S7 and S8. (b) S4, S5 and S6. (c) S3 and S9.</div>

Advances in Civil Engineering

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Figure 18

Figure 18: Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members 