Response of Suspension and Deck Arch Bridges to Spatially Varying Ground Motion

by Ronald S. Harichandran, Michigan State Univ, East Lansing, United States,
Ahmad Hawwari, Michigan State Univ, East Lansing, United States,
Basheer N. Sweidan, Michigan State Univ, East Lansing, United States,

Document Type: Proceeding Paper

Part of: Probabilistic Mechanics and Structural and Geotechnical Reliability


Recent awareness of the spatial variation of earthquake ground motion has caused concern about the safety of large engineered structures under seismic excitation. The effects of spatially varying ground motion on the response of a few grossly simplified structures have been analyzed in the past few years. This paper summarizes the results obtained from studies of the stochastic response of three actual longspan bridges excited by spatially varying ground motion. Studies were conducted on: a) the lateral response of the Golden Gate suspension bridge (GGB) in California with a 4,200 ft center span and 1,125 ft side spans; and b) the longitudinal and lateral response of the 1,700 ft New River Gorge arch bridge (NRGB) in West Virginia, and the 700 ft Cold Spring Canyon arch bridge (CSCB) in California. Two-dimensional finite element models were used for all the bridges.

Subject Headings: Suspension bridges | Bridge decks | Arch bridges | Ground motion | Span bridges | Structural safety | Two-dimensional models | Bridges | California | United States | West Virginia

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