Table 5 Drift ratios related to the initial crack, yielding occurrence of the reinforcement, and final step (Chiu et al. 2019).
Specimen | Initial flexural crack | Initial shear crack | Initial yielding of main bars | Initial yielding of stirrups | Maximum strength point | 0.8 maximum strength point (%) | Final step (%) |
|---|---|---|---|---|---|---|---|
10S0.15 | + 0.375% (1st cycle) | + 0.375% (1st cycle) | + 2.0% (1st cycle) | + 2.0% (1st cycle) | + 2.0% (1st cycle) | 3.16 | − 5 |
10S0.30 | + 0.75% (3rd cycle) | + 0.50% (1st cycle) | + 2.0% (1st cycle) | + 0.75% (1st cycle) | − 1.5% (1st cycle) | 2.61 | − 4 |
15S0.15 | + 0.375% (1st cycle) | + 0.375% (1st cycle) | − 2.0% (2nd cycle) | − 0.75% (2nd cycle) | + 1.5% (1st cycle) | 2.48 | − 4 |
15S0.30 | + 0.25% (1st cycle) | + 0.25% (1st cycle) | − 0.75% (1st cycle) | + 0.375% (1st cycle) | + 1.5% (1st cycle) | 1.71 | − 3 |
20S0.15 | + 0.25% (1st cycle) | + 0.25% (1st cycle) | + 1.0% (2nd cycle) | − 1.0% (3rd cycle) | + 1.5% (1st cycle) | 1.83 | − 4 |
20S0.30 | + 0.25% (1st cycle) | + 0.50% (1st cycle) | − 0.375% (3rd cycle) | + 1.0% (1st cycle) | + 0.75% (1st cycle) | 1.36 | − 2 |