The Application of Seismic Isolation to Bridges

by Ian G. Buckle, Dynamic Isolation Systems Inc, United States,
Ronald L. Mayes, Dynamic Isolation Systems Inc, United States,

Document Type: Proceeding Paper

Part of: Seismic Engineering: Research and Practice


Unlike a building application the primary intent in a bridge is to protect the structure below the plane of isolation - the superstructure being relatively rigid to in-plane loads and of adequate strength to resist these loads. Bridges are particularly suitable for isolation and literature surveys indicate that more than 90% of the world's isolated structures are, in fact, bridge structures. Applications include both new construction and retrofit work. Implementation within the United States has only occurred within the last few years and then predominantly as a retrofit measure rather than in new construction. This activity is reviewed in this paper.

Subject Headings: Seismic tests | Seismic effects | Base isolation | Bridges | Load factors | Bridge design | Load and resistance factor design | Case studies | United States

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