Application of the generalised scaling law to saturated ground

作者：Tobita Tetsuo^*; Iai Susumu; von der Tann Loretta; Yaoi Yuji

来源：International Journal of Physical Modelling in Geotechnics, 2011, 11(4): 138-155.

DOI：10.1680/ijpmg.2011.11.4.138

• centrifuge modelling, dynamics, liquefaction
• scaling laws

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.

• 出版日期2011
• 单位防灾科技学院