Pore Pressure Generation in Saturated Sand Induced by One- And Two-Dimensional Shakings

Tzou-Shin Ueng ； Che-An Lee

《Journal of GeoEngineering》 10卷2期 (2015/08) Pp. 53-61

https://doi.org/10.6310/jog.2015.10(2).3

並列摘要

The test data obtained from shaking table tests at the National Center for Research on Earthquake Engineering were processed and analyzed to study the effect of one- and two-dimensional shakings on soil liquefaction. The measured pore water pressures generated under one- and two-dimensional shakings at various locations within the sand specimens were compared. It was found that the ratios of the maximum excess pore water pressure generated in the sand specimens under two-dimensional shakings to that generated under one-dimensional shakings were always larger than 1.0 and the values were about the same at all different piezometer locations in the same shaking table test series. The ratio of the maximum pore pressure ratio, (r_u)_(max)=(Δ_u/σ_v')max, under two-dimensional shakings to that under one-dimensional shakings is approximately 5.0, and 3.0 for Vietnam sand and Mailiao sand, respectively. Analyses based on these findings showed that the liquefaction resistance of sand under two-dimensional shakings is approximately 0.75 to 0.85 of that under one-dimensional shakings.

並列關鍵字

Pore pressure ； liquefaction ； shaking table test ； multidirectional shaking ； sand ； earthquake