S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Civil & Environmental Engineering (건설환경공학부) Journal Papers (저널논문_건설환경공학부)
Development of Dissipation Model of Excess Pore Pressure in Liquefied Sandy Ground
- Issue Date
- J. Geotech. Engrg., 135(4), 544-554
- Recently, several studies on the dissipation of excess pore pressure in liquefied sandy grounds have been reported on
evaluation of postliquefaction behavior of structures. To further contribute to the understanding of this complicated dynamic phenomenon,
centrifuge tests were performed in this research to analyze the liquefaction behavior of level saturated sandy grounds. The test results
showed that the excess pore pressure in the liquefied sand was dissipated by the combined process of the solidification of the sand grains
and the consolidation of the solidified layer. Based on the test results, a nonlinear model for the solidified layer thickness versus time, i.e.,
the solidification velocity, was developed. A new dissipation model was also developed by combining the nonlinear solidification model
with Scotts theory to improve the prediction for the time history of excess pore pressure. In addition, a method for evaluating the input
parameters in the dissipation model was proposed by relating the parameters to the particle size and the relative density of soils. The
proposed dissipation model properly estimated the dissipation of excess pore pressure with time observed in the centrifuge experiments.
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