Research Article
Identification of Sudden Stiffness Change in the Acceleration Response of a Nonlinear Hysteretic Structure
Table 10
Relative errors between identification results and theoretical values under El-Centro earthquake wave.
| | Case | Time (s) | Relative error (%) | | k1 | k2 | ζ1 | ζ2 | Y | α | β | γ | n |
| | Case 1 | 0∼10 | 0.93 | 0.12 | 6.50 | 8.50 | 0.29 | 10.00 | 6.00 | 8.00 | 4.00 | | 10∼30 | 0.89 | 0.10 | 6.50 | 2.00 | 4.00 | 10.00 | 0.00 | 2.00 | 2.00 |
| | Case 2 | 0∼10 | 0.49 | 0.35 | 8.00 | 8.00 | 5.07 | 10.00 | 8.00 | 8.00 | 4.00 | | 10∼20 | 0.96 | 0.23 | 6.00 | 9.00 | 0.02 | 10.00 | 8.00 | 12.00 | 4.50 | | 20∼30 | 1.08 | 0.07 | 3.00 | 8.00 | 5.49 | 10.00 | 8.00 | 8.00 | 5.50 |
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