Journal
JOURNAL OF STRUCTURAL ENGINEERING
Volume 142, Issue 10, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)ST.1943-541X.0001541
Keywords
Vertical ground motion; Gravity dam; Incremental dynamic analysis; Fragility function; Seismic uncertainty; Seismic effects
Funding
- Dissertation Completion Fellowship from the Civil, Environmental, and Architectural Engineering department at the University of Colorado, Boulder
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This paper explores the seismic fragility curves for gravity dams with or without ground motion vertical component within the context of performance-based earthquake engineering. Structural analyses are performed using multiple-record incremental dynamic ones. The resulting capacity curves are contrasted with the well-established ones of framed structures. An optimal intensity measure parameter is also selected among 37 variations, and it is determined that the combined spectral acceleration leads to lowest dispersion. Finally, the derived fragility curves using the scaled records are compared with those from probabilistic seismic demand analysis (unscaled records). Results show acceptable consistency between the two methods. In addition, the effect of accounting for the epistemic uncertainty and pool elevation are discussed and are found to respectively alter the dispersion and median value of the collapse fragility curves.
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