Research Article
Identification of Sudden Stiffness Change in the Acceleration Response of a Nonlinear Hysteretic Structure
Table 11
Relative errors between identification results and theoretical values under Kobe earthquake wave.
| Case | Time (s) | Relative error (%) | k1 | k2 | ζ1 | ζ2 | Y | α | β | γ | n |
| Case 1 | 0∼10 | 0.15 | 0.10 | 7.00 | 8.50 | 6.82 | 0.00 | 12.00 | 12.00 | 2.00 | 10∼30 | 0.51 | 0.29 | 6.00 | 7.50 | 4.91 | 0.00 | 14.00 | 12.00 | 3.00 |
| Case 2 | 0∼10 | 1.25 | 0.14 | 11.00 | 8.00 | 5.93 | 0.00 | 6.00 | 14.00 | 2.50 | 10∼20 | 1.10 | 0.29 | 6.00 | 9.00 | 6.91 | 0.00 | 12.00 | 14.00 | 1.50 | 20∼30 | 1.17 | 1.04 | 6.00 | 7.50 | 4.60 | 0.00 | 12.00 | 10.00 | 2.00 |
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