過剰間隙水圧発生・消散過程を考慮した液状化地盤の地震時応答性状

概要

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Earthquake responses of sandy soil layers under the assumption of pore water pressure in drained condition are presented. Detailed overall consideration for various factors and effects induced by liquefaction are described by parametrical survey. The effective stress dynamic analysis by solving the discrete mass system with nonlinear hysteretic behavior is used. The following important factors for liquefaction and seismic response of sandy soil layers are considered by analysis, i.e. 1. Three types of earthquake ground motion records 2. Hysteretic properties of soils 3. Progressive developement of pore water pressure 4. Permeability of sand 5. Movement of water-table 6. Internal damping effect 7. Variation of soil rigidity in depth 8. Energy dissipation to bedrock. Time hystory and hysteretic responses in detail and maximum responses in each depth of soil layers are given for evaluation of some effects of pre-mentioned factors on liquefaction. Over-all discussions for liquefaction potential and prediction are prepared and some remarkable suggestions to engineering purpose for design are proposed.
社団法人日本建築学会の論文
1987-04-30