Retrofitting Northwest Connector for Seismic Forcesby Kevin Harper, California Dep of Transportation, Sacramento, United States,
Abstract: Many pre-1971 bridges in California have inadequate seismic resistance due to non-ductile components or poor connectivity of superstructure elements. Caltrans has finished the first retrofit phase, tying the superstructures together to prevent drop off failures. In the second phase, the entire structure is analyzed during the design seismic event and techniques are being developed to retrofit the substructure. Northwest Connector Overcrossing on State Highway Route 90, in Los Angeles, was the first phase 2 retrofit structure to be awarded for contract.
Subject Headings: Rehabilitation | Highway bridges | Connections (structural) | Seismic tests | Load and resistance factor design | Seismic effects | Bridge design | Highway and road design | Structural analysis | Highway and road structures | Seismic design | North America | California | United States | Los Angeles
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