On-Line Seismic Response Tests on Embankments Founded on Saturated Sandy Deposits

Fujii, Teruhisa; Hyodo, Masayuki; Kusakabe, Shin; Fukuda, K.

doi:10.2208/jscej.2000.652_229

Cited by 1 publication

(1 citation statement)

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“…Subsequent development concentrated on evaluating the potential for one-dimensional liquefaction. In such studies, the liquefiable layer was physically modelled by a soil element test, whereas a numerical model was applied to the remaining layers (Adachi et al, 1998;Fujii et al, 2000;Katada and Hakuno, 1982;Kusakabe and Morio, 1995;Sento et al, 2002). In these studies, the soil deformation caused by liquefaction both during and after an earthquake was evaluated.…”

Section: Introductionmentioning

confidence: 99%

Development of a real-time hybrid testing method in a centrifuge

Kong¹,

Cassidy

Gaudin

2015

International Journal of Physical Modelling in Geotechnics

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This paper presents a pioneering real-time hybrid testing method for geotechnical centrifuges. The method was used to investigate the behaviour of a jack-up leg reinstalled near an existing footprint, a problem that is highly nonlinear, stress dependent and involves complex soil-structure interactions. By physically modelling only the footprintleg interaction and numerically modelling the rest of the jack-up structure, the method enables a realistic account of all the parameters involved in the interaction, including the footprint geometry, soil heterogeneity and structural properties of the jack-up unit. The paper also details the three-degree-of-freedom actuators developed to model the interaction, which features controlled loads and motions along the vertical, horizontal and moment directions, and the real-time algorithm that bridges the physical and numerical models. The algorithm allows the stiffness on each axis to be varied. Testing performed at 1g and in the centrifuge, modelling jack-ups with different stiffness on the horizontal and moment axes, is presented to validate the apparatus and methodology. The hybrid apparatus and real-time testing method were found to produce much more realistic boundary constraints than previous fixedsystem apparatuses, and this allowed the test results to be considerably more informative, accurate and useful.

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Section: Introductionmentioning

confidence: 99%