The Response of Isolated Bridges Accounting for Spatial Variability of Ground Motion |
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Authors: | A Lupoi |
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Institution: | 1. Department of Structural &2. Geotechnical Engineering , “Sapienza” University of Rome , Rome, Italy alessio.lupoi@uniroma1.it |
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Abstract: | The effects of the spatial variability of ground motion (loss of coherence, wave passage, and local site conditions) on the response of isolated bridges are investigated. Therefore, a statistical approach is adopted to represent uncertainties in both the bridge configuration and the ground motion variability. The response of isolated bridges, designed for a standard input motion, under a spatially varying ground motion, is evaluated by nonlinear time-history analyses; the system performance is measured by the displacement demand on isolators. Results show that the phenomenon affects the structural response considerably; the demand increases for the majority of isolators, irrespective of bridge configuration. |
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Keywords: | Isolated Bridge Spatial Variability Site Effect Seismic Time-History |
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