Seismic in St. Louis

Article Abstract:

Some sections of the double-deck I-880 Cypress Viaduct and 40/I64 double-deck bridge in St. Louis, MO, have been damaged by the 1989 Loma Prieta earthquake. Investigations show that the structures do not conform with seismic standards. The Missouri Dept of Transportation (DoT) has made seismic evaluation and retrofit plans for the damaged structures to enhance their capability and meet current design standards which can withstand seismic activities.

Standards, Remodeling and renovation, Bridges, Bridge construction, Bridges (Structures), Earthquake resistant design, Viaducts

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Grace under pressure

Article Abstract:

The architectural and structural advantages offered by coupled core walls, constructed using coupling beams, are presented. The design methodologies for the development of next generation of steel and composite coupling beams are also presented.

United States, Steel Structurals & Piling, Iron and Steel Mills, Usage, Design and construction, Steel, Structural, Structural steel, Beams (Structural), Wall systems

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