Application of the generalised scaling law to saturated ground. Issue 4 (1st December 2011)

• Record Type: Journal Article
• Authors: Iai, Susumu; Yaoi, Yuji; von der Tann, Loretta; Tobita, Tetsuo
• Is Part Of: International journal of physical modelling in geotechnics. Volume 11:Issue 4(2011)
• Page Start: 138
• Page End: 155
• Publication Date: 2011-12-01
• Subjects: centrifuge modelling, dynamics, liquefaction; -- scaling laws; Rock mechanics -- Periodicals; Soil mechanics -- Periodicals; Geological modeling -- Periodicals; 624.151011
• DOI: 10.1680/ijpmg.2011.11.4.138
• Languages: English
• ISSNs: 1346-213X

Abstract

Abstract : To verify and find issues on the generalised scaling law for dynamic centrifuge tests, a series of centrifuge model tests are conducted under the scheme of the modelling of models technique. In a series of dynamic tests on a flat, saturated sand layer, four different centrifugal accelerations from 5 g to 70 g are applied to the scaled models for which the prototype is uniquely given. With the scaling law, the prototype is scaled down to 1/100. The models are exposed to sinusoidal input accelerations with 0·65 Hz and amplitudes of 2·1 m/s 2 and 3·1 m/s 2 in prototype scale. For response during shaking, nearly identical accelerations and excess pore-water pressure build-ups are recorded for all the cases in the prototype scale. Discrepancies are found on surface settlements and duration time for dissipation of excess pore-water pressure. The major cause of the discrepancy may be the small value of the shear modulus induced by the low confining stress in model ground under low centrifugal acceleration.