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Simulation of seismic response in a city-like environment

Jean-Philippe Groby·Chrysoula Tsogka·Armand Wirgin
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Abstract

We study the seismic response of idealized 2D cities, constituted by non equally-spaced, non equally-sized homogenized blocks anchored in a soft layer overlying a hard half space. The blocks and soft layer are occupied by dissipative media. To simulate such response, we use an approximation of the viscoelastic modulus by a low-order rational function of frequency and incorporate this approximation into a first-order-in-time scheme. Our results display spatially-variable, strong, long-duration responses inside the blocks and on the ground, which qualitatively match the responses observed in some earthquake-prone cities of Mexico, France, the USA, etc.

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Jean-Philippe Groby, Chrysoula Tsogka, Armand Wirgin. 2004-04-14. Simulation of seismic response in a city-like environment. https://arxiv.org/abs/physics/0404067

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