Abstract
Hybrid procedure is developed in order to analyze the behavior of buried pipelines in soil liquefaction processes. The procedure presented herein consists of a ground response evaluation using the finite element method and a pipe response analysis using the transfer matrix method. A rise of the ground water table induced by dissipation of excess pore water pressure is considered in the former evaluation. Numerical models show that the unsaturated layer around the pipelines liquefies due to the rise of the ground water table and accumulation of the excess pore water pressure. It is evident from the present study that the response characteristics of the buried pipelines change in the liquefaction process.
