Seismic in St. Louis

by Mark R. Capron, (M.ASCE), Sverdrup Civil, Inc., Maryland Heights, MO,

Serial Information: Civil Engineering—ASCE, 1997, Vol. 67, Issue 10, Pg. 62-64

Document Type: Feature article


Following collapse of sections of the double-deck I-880 Cypress Viaduct in the 1989 Loma Prieta earthquake, the Missouri Department of Transportation initiated a seismic evaluation and retrofit of the of the U.S. 40/I-64 bridge complex in St. Louis. The link, which carries more than 130,000 vehicles per day between Missouri and Illinois, was designed in the mid-1960s and includes more than 15,700 ft of side-by-side and double-deck roadway. The seismic evaluation, performed by Sverdrup Civil, Inc., identified a number of deficiencies needing serious attention. The retrofit will include competitive procurement of a seismic isolation system, hinge bearing replacement, shock transmitters, cross-frame modifications, column jackets and foundation mechanics.

Subject Headings: Seismic tests | Seismic effects | Rehabilitation | Highway and road design | Decks | Viaducts | Vehicles

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