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- W2580034449 abstract "The Whittier Narrows earthquake on October 1, 1987,was recorded by the earthquake monitoring system on anoffshore platform installed in a water depth of 97 min the Santa Barbara Channel. The maximum seaflooracceleration was approximately 4% g, despite the site'sepicentral distance of 129 km. In addition to structureresponse, soil-motion recordings were obtained at twolocations in a well conductor directly beneath the platform(3.6 m and 93 m below mudline). Using these soilmotions as input, the output-error approach was used toidentify optimal modal parameters. The dynamic behaviorof the structure was modeled as a linear system havingclassical normal modes. The recorded response wasadequately modeled by four sway modes plus a torsionmode. Identification of reasonable natural frequency anddamping values was straightforward. Selection of plausiblemode shapes was somewhat more complicated. This mayhave been due to the presence of closely-spaced modes andpossibly incomplete representation of the input" @default.
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- W2580034449 date "1989-01-01" @default.
- W2580034449 modified "2023-10-15" @default.
- W2580034449 title "Modal Parameter Identification of an Offshore Platform From Earthquake Response Records" @default.
- W2580034449 hasPublicationYear "1989" @default.
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