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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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Derivation of the scaling laws used in geotechnical centrifuge modelling-application of dimensional analysis and buckingham π theorem

TL;DR: In this paper, a derivation of scaling laws by dimensional analysis for the centrifugal modelling is presented, and basic principles of centrifuge modelling are described, for slow events like consolidation and fast events like dynamic loads are shown.
Book ChapterDOI

LEAP-UCD-2017 Centrifuge Test at KAIST

TL;DR: In this article, the ground models were prepared in a rigid box with a 5° sloping model with relative densities of 85 and 50% by using Ottawa sand and subjected to non-destructive and destructive motions based on a ground motion consisting of a tapered 1 Hz sine wave.
Journal ArticleDOI

Improved load capacity of a hybrid bucket foundation for offshore structures in sand

TL;DR: In this paper, a hybrid bucket foundation (HBF) design is proposed in which a suction bucket is connected to an underlying mat to increase load capacity, but the behavior of this design under combined vertical, horizontal, and/or moment loads is not yet well understood.
Journal ArticleDOI

Liquefaction evaluation using frequency characteristics of acceleration records in KAIST centrifuge tests for LEAP

TL;DR: In this article, the frequency characteristics of liquefied and partially liquefified models were observed using Fast Fourier Transform (FFT), ratio of response spectra (RRS) and time-frequency analysis of recorded accelerations.
Journal ArticleDOI

Correlation between the Shear-Wave Velocity and Tip Resistance of Quartz Sand in a Centrifuge

TL;DR: In this paper, the in-flight strength and stiffness parameters of the soil model were evaluated to understand soil behavior in a centrifuge model, and both the shear-wave velocity (Vs) and cone velocity (CV) were evaluated.
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.