Research Article
An Experimental Investigation of Unbonded Laminated Elastomeric Bearings and the Seismic Evaluations of Highway Bridges with Tested Bearing Components
Table 4
Comparison of both the equivalent stiffness and damping ratio of specimen Y2-8/45-UB.
| ESS (%) | Equivalent stiffness | Equivalent damping ratio | Experiment (×103 Nmm) | OpenSees (×103 Nmm) | Difference (%) | Experiment (×103 Nmm) | OpenSees (×103 Nmm) | Difference (%) |
| 75 | 1.723 | 1.301 | 24.5 | 0.161 | — | — | 100 | 1.627 | 1.301 | 20.0 | 0.166 | — | — | 150 | 1.433 | 1.163 | 18.8 | 0.281 | 0.230 | 18.8 | 200 | 0.641 | 0.706 | −10.0 | 0.371 | 0.320 | 13.7 | 250 | 0.524 | 0.472 | 9.9 | 0.412 | 0.370 | 10.2 | 300 | 0.424 | 0.393 | 7.3 | 0.440 | 0.460 | −4.6 | 350 | 0.341 | 0.336 | 1.3 | 0.443 | 0.477 | −7.6 | 400 | 0.286 | 0.294 | −3.0 | 0.452 | 0.495 | −9.5 |
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