Earthquake Analysis of Arch Dams:Factors to Be Considered

Abstract eng:
The factors that influence significantly the three-dimensional analysis of arch dams are identified: the semiunbounded size of the reservoir and foundation rock domains, dam-water interaction, wave absorption at the reservoir boundary, water compressibility, dam-foundation rock interaction, and spatial variations in ground motion at the dam-rock interface. Linear analysis procedures and implementing computer software, EACD-3D2008, that include the aforementioned factors are mentioned. Through a series of example analyses of several actual dams, the significance of the aforementioned factors is demonstrated, leading to the conclusion that they should all be included in computing seismic demands on arch dams. Unfortunately, however, most finite element analyses of dams conducted in professional practice are based on commercial software, which ignore these factors.

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