ABSTRACT
Various types of models of a lead core rubber bearing are discussed in this contribution. This includes an analytical model defining the overall behavior of the isolator and a finite element model in which constitutive relations are formulated for the constituencies (rubber, lead, and steel). The models are being developed for implementation in the finite element model of a seismically protected structure. The presented ongoing study aims to simulate the dynamic response of a base-isolated bridge during a strong ground motion. On the one hand, the focus is on the LRB model, and the bridge structure is being described with relatively few details. On the other hand, both the analytical and the finite element models are to be implemented in the finite element model of the bridge. Comparison of the dynamic response of the bridge obtained with the LRB models will enable the assessment of the analytical model validity domain.
