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1986”N
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1081-1086•Å
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PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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Akira OHTSUKI, Kohei WATANABE, Tetsuji ITOH, Naonobu TAKEWAKI
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TWO-DIMENSIONAL EFFECTIVE STRESS ANALYSIS OF LIQUEFACTION INCLUDING SOIL-STRUCTURE INTERACTION
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An effective stress method is presented for analysis of seismic response and liquefaction of irregular ground including soil-structure interaction, based on an implicit-explicit finite element method. A pore water pressure is computed with the total stress considering undrained condition. The proposed method of analysis is compared with other well-known methods for a one-dimensional model, which is in good agreement. The simulated pore water pressure is also in reasonably good agreement with the experimental data. The present effective stress method is applied to liquefaction problems involving two-dimentional soil-structure model. The structure is modeled by multi-degree of freedom system with bi-linear springs. It is recognized that the present method can simulate the response of the ground and the structure under the initial liquefaction reasonably well.
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