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9-1Šª
”NF
1994”N
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PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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Shunichi IGARASHI
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EVALUATION OF ENERGY-BASED FACTOR OF SAFETY AGAINST LIQUEFACTION
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The factor of safety against liquefaction of saturated soil is defined: F¡ = ¡(¡/¡) where ¡ is the strain energy increament in the pore-water due to the plastic deformation of the skeleton and ¡ is the increament necessary to cause liquefaction. A pair of material constants, namely energy absorption ratio and dynamic internal friction angle, are introduced to express the strength of soil against liquefaction. A procedure is developed to evaluate F¡ from strong motion parameters and is verified by the case study of the Wildlife Liquefaction Array.
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