The Rolling Ball Rubber Layer (RBRL) earthquake isolation system, described by Dona et al. (2015a), is intended to have isotropic force-displacement behaviour in the horizontal plane. As with all earthquake isolation systems, time-history analyses are required for assessment of performance during strong ground motion excitation, for which a time-domain model is essential. A simplified preliminary analytical biaxial model is proposed, motivated by experimental results together with observed physical effects and the viscoelastic nature of rubber.
Biaxial model for the rolling-ball rubber-layer isolation system
Dona Marco;
2015
Abstract
The Rolling Ball Rubber Layer (RBRL) earthquake isolation system, described by Dona et al. (2015a), is intended to have isotropic force-displacement behaviour in the horizontal plane. As with all earthquake isolation systems, time-history analyses are required for assessment of performance during strong ground motion excitation, for which a time-domain model is essential. A simplified preliminary analytical biaxial model is proposed, motivated by experimental results together with observed physical effects and the viscoelastic nature of rubber.
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