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

Kim, Mu-Kwang; Lee, Sei-Hyun; Choo, Yun Wook; Kim, Dong-Soo

doi:10.1016/j.soildyn.2011.06.010

Cited by 65 publications

(40 citation statements)

References 20 publications

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“…M s ). Following the work ofSwaisgood (2003),Kim et al (2011) performed centrifuge tests of typical types of Korean dams and the results obtained in terms of recorded settlements matched quite well to the values of field data ofSwaisgood (2003) and the proposed damage levels, as the centrifuge results followed a similar trend.32Ioanna Rapti et al…”

supporting

confidence: 67%

Liquefaction analysis and damage evaluation of embankment-type structures

Rapti

López-Caballero

Modaressi-Farahmand-Razavi

et al. 2018

Acta Geotech.

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The increasing importance of performance-based earthquake engineering analysis points out the necessity to assess quantitatively the risk of liquefaction of embankment-type structures. In this extreme scenario of soil 2 Ioanna Rapti et al. liquefaction, devastating consequences are observed, e.g. excessive settlements, lateral spreading and slope instability. The present work discusses the global dynamic response and interaction of an earth structure-foundation system, so as to determine quantitatively the collapse mechanism due to foundation's soil liquefaction. A levee-foundation system is simulated and the influence of characteristics of input ground motion, as well as, of the position of liquefied layer on the liquefaction-induced failure is evaluated. For the current levee model, its induced damage level (i.e. induced crest settlements) is strongly related to both liquefaction apparition and dissipation of excess pore water pressure on the foundation. The respective role of input ground motion characteristics is a key component for soil liquefaction apparition, as long duration of mainshock can lead to important nonlinearity and extended soil liquefaction. A circular collapse surface is generated inside the liquefied region and extends towards the crest in both sides of the levee. Even so, when the liquefied layer is situated in depth, no significant effect on the levee response is found. This research work provides a reference case study for seismic assessment of embankment-type structures subjected to earthquake and proposes a high-performance computational framework accessible to engineers.Keywords Dynamic analysis · Nonlinear coupled hydromechanical behavior · Soil liquefaction · Earthquake loading · strain localization · instability · FE modeling Liquefaction analysis and damage evaluation of embankment-type structures 3

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supporting

confidence: 67%

Liquefaction analysis and damage evaluation of embankment-type structures

Rapti

López-Caballero

Modaressi-Farahmand-Razavi

et al. 2018

Acta Geotech.

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“…For the centrifugal loading tests, the acceleration response and residual deformation were investigated for the Earth-core rock-fill dam and concrete-faced rock-fill dam [7]. The effect of the liquefaction of foundation on the deformation of the dam was examined [8].…”

Section: Previous Studiesmentioning

confidence: 99%

Seismic Crack Investigation in an Earth Dam by Centrifugal Loading Test

Kobayashi¹,

Murakami²

2019

Dam Engineering

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There are many Earth-fill dams in Japan, which are mostly used for irrigation use. Most of these dams in Japan were constructed by experience over 100 years ago. There are so many irrigation dams, which suffered earthquake damage in the past. Due to the damages, the cracks at the crest in the dam-axis direction have been reported in many cases. For the rock-fill dam recently constructed, the crack on the crest in the dam-axis direction has also been found in the case of a large earthquake. The mechanism of such a crack has not been discussed well. In this study, to clarify the mechanism of a crack in the dam-axis direction, a centrifugal loading test was applied to the dam with a 50 G gravity field. As a result, the critical level of strain was observed at the crest of the model, and it was found that the horizontal displacement at the upper part of the dam was excessive. It can be concluded from the study that the seismic cracks in the dam-axis direction occurred due to the excessive tensile stress, which was not considered in the design process.

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“…The base shaking acceleration can be exerted to a maximum value of 20gh with a maximum payload of 700 kg, which corresponds to 0.5gh in prototype scale at 40gc centrifugal acceleration. There are advantages to generate real earthquake signal as well as the Sine wave in KAIST Earthquake Simulator (Kim et al, 2011). The scaling laws for centrifuge testing have been derived by Scofield(1980).…”

Section: Kaist Dynamic Geo-centrifuge Testing Facilitymentioning

confidence: 99%

“…Dynamic geotechnical centrifuge modeling is one of the effective ways to observe the soil structure interaction during earthquake (Ghosh and Madabhushi, 2007;Kim MK, 2010, 2011. For the proper simulation of soil-foundation-structure system in the centrifuge modeling, dynamic soil properties such as V S profile, normalized modulus reduction (G/G max ) and damping (D) curves should be duplicated as in situ and the model foundation and structure need to be designed according to the scaling law (Scofield, 1980).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Centrifuge Simulation for Soil-Foundation-NPP Containment System

Ha¹,

Lee²,

Kim³

et al. 2012

GeoCongress 2012

Self Cite

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The objective of this study is to duplicate the full soil structure interaction (SSI) behavior of Hualien Large-Scale Seismic Test (LSST) in the centrifuge modeling. To simulate dynamic soil properties, a series of resonant column tests were performed to determine model soil preparation conditions, such as compaction density and ratio of soil-gravel contents. After the model preparation, the shear wave velocity (V S ) profile of the model was evaluated using in-flight bender element tests and compared with the insitu V S profile. The containment building and its foundation were modeled by aluminum according to the scaling law. A series of dynamic centrifuge tests were performed with 1/50-sized model using the recorded base motion at Chi-Chi earthquake. By comparing the recorded data during earthquake with centrifuge test data, the applicability of centrifuge test in the simulation of soil-foundation-structure interaction of NPP containment system was assessed.

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

Cited by 65 publications

References 20 publications

Liquefaction analysis and damage evaluation of embankment-type structures

Liquefaction analysis and damage evaluation of embankment-type structures

Seismic Crack Investigation in an Earth Dam by Centrifugal Loading Test

Dynamic Centrifuge Simulation for Soil-Foundation-NPP Containment System

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