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 stiffnessEquivalent damping ratio
Experiment
(×103 Nmm)
OpenSees
(×103 Nmm)
Difference (%)Experiment
(×103 Nmm)
OpenSees
(×103 Nmm)
Difference (%)

751.7231.30124.50.161
1001.6271.30120.00.166
1501.4331.16318.80.2810.23018.8
2000.6410.706−10.00.3710.32013.7
2500.5240.4729.90.4120.37010.2
3000.4240.3937.30.4400.460−4.6
3500.3410.3361.30.4430.477−7.6
4000.2860.294−3.00.4520.495−9.5