Abstract
The purpose of this study is to propose two ways of reducing residual displacements for the high ductility steel bridge piers after severe earthquakes. The first way is to use a seismic isolation bearing. The second way is to fill partially in the pier attached to a seismic isolator with concrete. For this purpose, a new method of pseudodynamic test for steel bridge piers with a seismic isolator is established. Based on the results of the pseudodynamic tests, they are shown that the seismic performance of steel bridge piers with a seismic isolator is evaluated, and a rational range of the natural period to be augmented by the isolator is proposed for practical design.
