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Journal ArticleDOI

A Newly Developed State-of-the-Art Geotechnical Centrifuge in Korea

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TLDR
The first large scale geotechnical centrifuge in Korea has recently been developed at KAIST under the Korea Construction Engineering Development (KOCED) Collaboratory program as discussed by the authors.
Abstract
The first large scale geotechnical centrifuge in Korea has recently been developed at KAIST under the Korea Construction Engineering Development (KOCED) Collaboratory program. A 5 m platform radius, 240 g-tons state-of-the-art geotechnical centrifuge has been installed in a new facility. The centrifuge has the unique feature of an automatic balancing system and includes parts for general testing purposes such as fluid rotary joints, slip rings, a fiber optic rotary joint and an Ethernet network system. In addition, a four degree-of-freedom in-flight robot can be equipped to simulate complex construction or in-situ testing process during centrifuge flight. In order to simulate earthquake motion during operation, a self-balancing type biaxial shaking table has also been developed. Since the KOCED program promotes collaboration and remote use, tele-presence and tele-participation environments have been implemented in this facility.

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Citations
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Journal ArticleDOI

The behavior characteristics of a reservoir levee subjected to increasing water levels

TL;DR: In this article, the authors investigated the behavior characteristics of reservoir levees with different velocities of increasing water levels, and they confirmed that increased water levels at higher velocity induces dramatic increases in the displacement, plastic volumetric strain and risk of hydraulic fracturing occurring in the core of the levee.

An experimental study for the effect of soil plug on the basal heave stability for the vertical shaft excavation in clay

Abstract: Recently, the need for research on vertical shaft excavation is increasing with the increase of the demands for the underground and utility tunnels. As a part of the R&D project of the Ministry of Land, Infrastructure and Transport, CUT (center for utility tunnel) has developed “Ring cut method”. “Ring cut method” is a method to improve the stability of the ground against the basal heave by excavator wall pre-penetration during vertical shaft excavation. In this study, the basal heave was simulated by centrifugal model test. The basal heave, ground subsidence, and ground deformation of surrounding ground were analyzed by soil plug effect from wall pre-penetration. It was found that the soil plug could control the basal heaving and ground subsidence, and verified that the ‘Ring cut method’ could be a good countermeasure for the ground stability against the basal heave.
Journal ArticleDOI

Evaluation of the Virtual Fixed-Point Method for Seismic Design of Pile-Supported Structures

TL;DR: In this paper, the applicability and accuracy of the virtual fixed point (VFP) method to evaluate piles under seismic loads has not been sufficiently explored, despite the popularity of the technique.
References
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Journal ArticleDOI

Cambridge Geotechnical Centrifuge Operations

A. N. Schofield
- 01 Sep 1980 - 
TL;DR: In this paper, the authors show that the stress/strain behavior of soil alters with change of effective pressure p and specific volume v. The range of values of a new equivalent liquidity LI5 = LI+0·5 log (p′/5) associated with yielding is 1·9
Reference BookDOI

Geotechnical Centrifuge Technology

R.N. Taylor
TL;DR: A N Schofield Geotechnical centrifuges: past, present and future - Dr W H Craig Centrifuge modelling: practical considerations - R N Taylor Retaining walls and soil-structure interaction - W Powrie Buried structures and underground excavations as mentioned in this paper.
Journal ArticleDOI

Seismic behaviors of earth-core and concrete-faced rock-fill dams by dynamic centrifuge tests

TL;DR: In this article, a series of staged centrifuge tests was performed by applying real earthquake records from 0.05 to 0.5g and the distributions of amplification ratio differed depending on the magnitude of earthquake loading and the zoning condition.
Journal ArticleDOI

A wireless high-speed data acquisition system for geotechnical centrifuge model testing

TL;DR: In this paper, the authors describe a novel high-speed wireless data acquisition system (WDAS) developed at the University of Western Australia for operation onboard a geotechnical centrifuge, in an enhanced gravitational field of up to 300 times Earth's gravity.