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Simplified Numerical Analysis on Earthquake Response of Irregularly Bounded Surface Layer

by Choshiro Tamura, Univ of Tokyo, Tokyo, Japan,
Kazuo Konagai, Univ of Tokyo, Tokyo, Japan,



Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering

Abstract:

Evaluation of seismic response of a soft surface layer is the essence in a design of a lifeline in this layer. For this purpose, a quasi-three dimensional ground model was developed by the authors. In this model, a surface layer is modeled by a horizontally spread finite-element-net with its nodes supported by the Winkler-type springs. Some important simplifications are adopted in the present approach to take account of irregular shape and profile of a surface layer efficiently. This paper describes review of these assumptions so that the present method can be properly used in practice.

Subject Headings: Finite element method | Numerical analysis | Lifeline systems | Earthquakes | Soil analysis | Seismic tests | Seismic design

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