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| Titel |
Performance of heterogeneous earthfill dams under earthquakes: optimal location of the impervious core |
| VerfasserIn |
S. López-Querol, P. J. M. Moreta |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 8, no. 1 ; Nr. 8, no. 1 (2008-01-10), S.9-18 |
| Datensatznummer |
250005317
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| Publikation (Nr.) |
 copernicus.org/nhess-8-9-2008.pdf |
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| Zusammenfassung |
| Earthfill dams are man-made geostructures which may be especially
damaged by seismic loadings, because the soil skeleton they are
made of suffers remarkable modifications in its mechanical
properties, as well as changes of pore water pressure and flow of
this water inside their pores, when subjected to vibrations. The
most extreme situation is the dam failure due to soil
liquefaction. Coupled finite element numerical codes are a useful
tool to assess the safety of these dams. In this paper the
application of a fully coupled numerical model, previously
developed and validated by the authors, to a set of theoretical
cross sections of earthfill dams with impervious core, is
presented. All these dams are same height and have the same volume
of impervious material at the core. The influence of the core
location inside the dam on its response against seismic loading is
numerically explored. The dams are designed as strictly stable
under static loads. As a result of this research, a design
recommendation on the location of the impervious core is obtained
for this type of earth dams, on the basis of the criteria of minor
liquefaction risk, minor soil degradation during the earthquake
and minor crest settlement. |
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