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Fault rupture and kinematic distress of earth filled embankments

V. Zania, Y. Tsompanakis, P.N. Psarropoulos

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Summary

According to common practice the seismic design of any type of structure or infrastructure is focused on theinertial loading and the resulting distress generated due to the imposed ground shaking. Regarding the effects offault rupture on seismic design, seismic norms contain mainly provisions that are related to the citation of thestructures/geostructures. Moreover, the additional distress imposed to large-scale structures (like bridges,lifelines, dams, or earth-filled embankments) by the applied permanent deformations produced during apotential fault rupture may not be possible to be avoided. As in many cases the exact location of faults is notknown, especially when surface scarps are not present, the consequences of the permanent deformations inlarge-scale structures should be carefully and realistically evaluated. The current study examines numericallythe behavior of earth-filled embankments, focusing on their kinematic distress due to fault rupture propagation.Apart from a brief literature review of the problem, a parametric study is conducted in order to investigate therole of the main parameters involved. The results indicate that the effects of fault rupturing in earth-filledembankments should be treated with caution. Additionally, the resulting kinematic distress should not bedisregarded in the stability assessment, and therefore, it should be taken into account in the overall seismicdesign of the embankments

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