ABSTRACT
Lead rubber bearings play very important roles in ensuring the seismic safety of seismically isolated bridges but their mechanical properties are varied due to aging deterioration. In this study, the effects of long-term aging deterioration of lead rubber bearings on the seismic behavior of isolated bridges were investigated based on incremental dynamic analysis. As a result, it was shown that the variation of column response after yielding is significant regardless of deterioration of seismic isolators especially if natural period of the bridge column on the fixed bearing condition is short.
