Research Article

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

Figure 5

DK,k-k relations of specimens R1 to R24. (a) Group 1. (b) Group 2. (c) Group 3. (d) Group 4. (e) Group 5. (f) Group 6. (g) Group 7. (h) Group 8.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)