Dynamic Analysis of Artificial Boundaries in Gravity Dam-Foundation Rock Interaction System

Abstract:

ANSYS was used to focus on comparative analysis of several artificial boundary conditions that are widely used in engineering applications. The accuracy and stability of dynamic analysis results were then analyzed in details of a semi-infinite foundation with different artificial boundaries and different frequency input loads. Lastly, the seismic response of a gravity dam-foundation rock system was explored numerically. Experimental results revealed the simulation accuracy of artificial boundaries was closely related to the dynamic characteristics of input load and the elastic wave velocity. When the input load frequency was high, only the material with comparably higher elastic wave velocity could maintain the stability of the artificial boundary. Viscoelastic artificial boundary is practically simple and can better simulate the semi-infinite material elastic recovery ability and energy radiation outside the boundary.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 1680-1686
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.1680
• Online since: July 2014
• Authors: Wen Qiao*, Guo Ming Liu
• Keywords: Artificial Boundary Condition, Dynamic Analysis, Gravity Dam-Foundation System, Hydraulic Structure, Seismic Wave

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