Shaking table tests on subgrade reaction of pipe embedded in sandy liquefied subsoil

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• 作者：Towhata ; I. ; Vargas-Monge ; W. ; Orense ; R.P. ; Yao ; M.
• 关键词：Dilatancy ; Flow failure ; Liquefaction ; Model test ; Sand ; Viscosity
• 刊名：Soil Dynamics and Earthquake Engineering
• 出版年：1999
• 出版时间：July, 1999
• 年：1999
• 卷：18
• 期：5
• 页码：347-361
• 全文大小：897 K

文摘

An interest in the behavior of liquefied sand during seismic flow failure led the authors to conduct shaking table tests in which an embedded pipe was pulled laterally and the required drag force was monitored. Test results showed that the amplitude of shaking acceleration affected the behavior of sand in both dry and water-saturated conditions. In dry sand, the induced inertia force decreased the shear strength and consequently the magnitude of the drag force. When the sand was saturated, a special consideration was made of the similitude of dilatancy between 1-G model tests and the in-situ situation. This goal was attained by employing very loose sand in model tests. The rate-dependency in which the drag force increased with the rate of pipe movement was focused on, leading to an apparently viscous behavior of sand. This is consistent with what several former studies reported.