A new approach to assess the dynamic sliding stability of structures: Application to concrete dams

Abstract eng:
This paper proposes a new numerical technique to assess the dynamic sliding stability of structures. First, special finite elements are developed to account for the effects of cohesive contact and tensile strength along interfaces regardless of the complexity of their geometric irregularity. The developed elements can account for sliding, rocking and degradation of the mechanical properties along contact interfaces during dynamic excitation. For illustration purposes, the proposed methodology is applied to an existing concrete dam subjected to earthquakes. Based on the results, the simplifying assumptions commonly adopted in this type of analyses are criticized and are shown to be unconservative in some cases.

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