強震時の地盤のモデル化と注入固化工法によるタンクの液状化時の挙動(<特集>最先端の地盤の数値解析)

概要

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Recent seismic designs use very strong earthquake ground motions as inputs. Accordingly, the nonlinear behavior of soils, even those in strongly nonlinear areas, must be analyzed in order to understand the soil's behaviors not only during shaking but also after liquefaction. In this study, the author modeled the nonlinearity of various types of soil, including completely liquefied soil. A constitutive equation was used for three-dimensional effective stress analysis of the seismic behavior of a tank designed in accordance with old laws and installed on soft ground that had been partly improved by means of chemical grouting. The tank's structural integrity was examined by evaluating the residual deformation of the soil after an earthquake according to a theory on liquefied soil.
2011-03-01