A comprehensive testing database composed of modeling-quality, multi-directional cyclic simple shear testing on medium to high relative density, fully-saturated samples of Monterey 0/30 sand has recently been developed. This testing incorporated a variety of never before examined multi-directional stress paths on both level and sloping ground. Results from these tests have proven useful for enhancing current understanding of liquefaction behavior by allowing for a more complete theory to emerge. This new three-dimensional theory greatly expands current understanding of liquefaction behavior and elucidates some areas in which current theory—which has been based principally on uni-directional testing—can be misleading or unconservative. Of particular interest are the topics of (a) pore pressure generation as a function of loading magnitude and direction, (b) the effects of sloping ground conditions, (c) the post-liquefaction pore pressure behavior within each cycle, and (d) strain accumulation. Also described is the impact of multidirectional loading on maximum achievable pore pressures.
International Conference on Soil Mechanics and Geotechnical Engineering - 16th International Conference on Soil Mechanics and Geotechnical Engineering (Osaka)
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