This paper aims to investigate seismic response behavior of buried pipelines subjected to large ground displacements during huge earthquakes and evaluate the response characteristics of them for various conditions of ground and pipelines. The seismic response analysis method for surface ground layers uses 2-dimensional effective stress analysis based on Biot’s two phase mixture theory and Iai’s constitutive equation. The pipeline analysis is based on a beam theory on an elastic foundation and modified transfer matrix method. Numerical computations are performed for various models with changing conditions of ground and pipes. As a result, axial and lateral response characteristics of pipelines are shown and evaluated by relating with earthquakes, ground and pipelines conditions.
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