Absorbing Boundary Conditions for Seismic Analysis in ABAQUS
نویسنده
چکیده
Abstract: Absorbing boundary conditions are required to simulate seismic wave propagation in elastic media. In the first part of the paper, a number of relevant ABCs are reviewed with emphasis on practicality and ease of implementation. The second part of the paper describes the derivation of a new user element for seismic analysis in ABAQUS/Standard. The element is a combination of two ideas: one is the viscous boundary traction due to Lysmer and Kuhlemeyer, and the other is the free-field soil column as proposed by Zienkiewicz et al. The viscous boundary absorbs radiating waves, while the free-field soil column accounts for the seismic motions along the edges of the model. Element matrices are given in full.
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