The Effect of Varying Geometry on The Amplification of Ground Motion on Zoned Earthen Dams
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Date
2020
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Addis Ababa University
Abstract
Stability and safety are very important issues for embankment dams built in seismic
regions. Earthquakes impose additional loads on to embankment dams over those
experienced under static conditions that could cause settlement and longitudinal and
transverse cracking of the embankment, particularly near the crest of the dam. The
main objective of this study is to conduct seismic analysis of a zoned earth dam to
observe the effect of dam geometry on the amplification of ground motion within the
body of the dam. This can be done using GeoStudio which is a finite element based
software. A typical dam cross section with fixed slope and different geometric sizes
on top of different foundations have been analyzed. Thus real earthquake records are
used as input motion with varying peak ground acceleration. The results obtained
from the study show that varying the geometry together with the ground motion and
peak ground acceleration values have significant effect on the ground motion
amplification within the dam body.
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Keywords
Ground Motion, Zoned Earthen Dams, Geometry, Amplification