Control of seismic energy partitioning of bridge piers with sliding rubber bearing

摘要

Base isolation bearings have many good properties for seismic protection of bridges. Recently a new sliding rubber bearing was developed, which has both characteristics of sliding and rubber bearings. When we install these seismic isolation systems, reasonable inelastic design method is required. But since the conventional inelastic design method takes into account only bridge piers, it is hard to design seismic isolators which can cope with the interaction between seismic isolators and bridge piers. The purpose of this study is to understand the relationship between the seismic isolation systems and piers with respect to their energy dissipation etc. and to attempt to propose a design procedure for isolated bridges.