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

Figure 17

Hysteresis loops for specimens S1 to S9: (a) S1. (b) S2. (c) S3. (d) S4. (e) S5. (f) S6. (g) S7. (h) S8. (i) S9.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)