Seismic Behavior of a Bituminous-Faced Rock-Fill Dam: The Menta Dam
Date Issued
2021
Author(s)
Ljupcho Petkovski, Stevcho Mitovski, Frosina Panovska
DOI
https://doi.org/10.1007/978-3-030-51085-5_33
Abstract
In the analysis of the dynamic response of the bituminous-faced rockfill dam (BFRD) Menta, is applied non-linear model, where the rock material is
approximated by variable sliding modulus, and the asphaltic facing with thickness
of 32 cm is applied by joint elements with linear elastic constitutive law. Permanent
displacements during the seismic excitation are determined by Dynamic deformation
analysis, where the incremental forces are calculated by the difference of the effective
stresses in two successive time steps, resulting in adequate deformations. For the state
of reservoir rapid filling, as pre-earthquake state by normal water elevation in the
reservoir, is used elastoplastic model by variable modulus of elasticity for the rock
material. By the dynamic analysis is verified the seismic resistance of the fill dam
at action of design earthquakes by PGA of 0.26 g, without disruption of the water
impermeability of the asphaltic facing and without danger for rapid and uncontrolled
emptying of the reservoir, because the settlements in the dam crest caused by dynamic
inertial forces for the earthquake duration amounts 40 cm, i.e. they are much lower
than the height above normal elevation in the reservoir till the dam crest, with value
of 7.25 m.
approximated by variable sliding modulus, and the asphaltic facing with thickness
of 32 cm is applied by joint elements with linear elastic constitutive law. Permanent
displacements during the seismic excitation are determined by Dynamic deformation
analysis, where the incremental forces are calculated by the difference of the effective
stresses in two successive time steps, resulting in adequate deformations. For the state
of reservoir rapid filling, as pre-earthquake state by normal water elevation in the
reservoir, is used elastoplastic model by variable modulus of elasticity for the rock
material. By the dynamic analysis is verified the seismic resistance of the fill dam
at action of design earthquakes by PGA of 0.26 g, without disruption of the water
impermeability of the asphaltic facing and without danger for rapid and uncontrolled
emptying of the reservoir, because the settlements in the dam crest caused by dynamic
inertial forces for the earthquake duration amounts 40 cm, i.e. they are much lower
than the height above normal elevation in the reservoir till the dam crest, with value
of 7.25 m.
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