2026 Volume 26 Issue 2 Pages 2_75-2_87
Lead rubber bearings (LRB) generate restoring forces that depend on the temperature and strain rate of the lead. An analytical model considering work hardening and recovery of lead was proposed for the LRB. Both work hardening and recovery are defined according to the Arrhenius law. The modification method from existing models is presented, and parameter was identified using experimental results from dynamic tests on full-scale LRBs with a diameter of 1300 mm. The proposed model was shown to reproduce experimental results very well for different frequencies and amplitudes while reflecting the temperature rise of the lead plug due to cyclic loading. This model has the potential to be applied to modeling viscoelastic materials with similar dependencies.
