Study on 3-D Dynamic Analysis of Arch Dam Against Strong Earthquake Motion Cosidering Discontinuous Behavior of Joints

Ariga, Yoshiaki; Cao, Zengyan; Watanabe, Hiroyuki

doi:10.2208/jscej.2004.759_53

Cited by 7 publications

(1 citation statement)

References 6 publications

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“…The 3D earthquake response analyses of the dam and foundation system are carried out using UNIVERSE, which is a program designed for the analysis of dams (Ariga et al, 2004).…”

Section: The Engineering Bedrock and The Input Ground Motions At This Locationmentioning

confidence: 99%

Characteristics of seismic motions at a concrete gravity dam site and suggestions for setting the engineering bedrock

Yasuda¹,

Cao

2021

Earthquake Spectra

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The earthquake records of a concrete gravity dam with eight seismographs were spectrally analyzed to clarify the characteristics of the seismic motions at each monitoring station. Based on the analysis results, whether it is appropriate to use such earthquake records to generate the input ground motion in assessments of the seismic performance of dams was discussed. It was found that the earthquake records at the dam base show reduced amplitudes at frequencies corresponding to the natural vibration modes of the dam. When these earthquake records are used to generate the input ground motion in an assessment of the seismic performance of a dam, sufficient consideration should be given to this feature. Suggestions on where to install seismographs at dam sites are presented. Based on the numerical simulation of the seismic response of the dam, it is suggested that the engineering bedrock should be considered to be located at a depth of at least 1.5 times the dam height, and the shear wave velocity of the rock at that depth should preferably be 2000 m/s or more. Since this study uses seismic motions recorded across the entire dam site, including the deep rock, which is globally rare, it is considered that the basic conclusions obtained in the article can provide a reference for other concrete dams.

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“…The 3D earthquake response analyses of the dam and foundation system are carried out using UNIVERSE, which is a program designed for the analysis of dams (Ariga et al, 2004).…”

Section: The Engineering Bedrock and The Input Ground Motions At This Locationmentioning

confidence: 99%

Characteristics of seismic motions at a concrete gravity dam site and suggestions for setting the engineering bedrock

Yasuda¹,

Cao

2021

Earthquake Spectra

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Analytical study on effects of fracture energy for crack propagation in arch dam during large earthquake

Sato¹,

Kondo²,

Sasaki³

et al. 2019

Sustainable and Safe Dams Around the World

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Evaluation of the Material Property and Seismic Performance of a Rockfill Dam During Large Doublet Earthquakes

Yasuda¹,

Cao

Nakamori³

2021

Journal of JSCE

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The relationship between the shear modulus and shear strain of embankment materials is evaluated based on earthquake records. When the average shear strain of a dam body is less than approximately 2.0×10 -4 , the decreased stiffness of the embankment materials can be promptly recovered. However, when the shear strain exceeds 1.0×10 -3 , one week or more may be necessary for the stiffness to be recovered. Using the evaluated nonlinear properties, the behaviors of the Aratozawa dam during an assumed large doublet earthquake are investigated through numerical analyses. The results indicate that the change in the dynamic characteristics of the dam in response to the first event considerably influences the dynamic behaviors of the dam during the second event. In addition, a procedure to evaluate the seismic performance of rockfill dams during doublet earthquakes is proposed. In this approach, the variation in the material properties in the first and second events is considered. The final residual subsidence of the dam is predicted by summing the sliding displacements caused by each earthquake and subsidence related to the shaking and rearrangement of soil particles. Furthermore, as a precautionary measure for assumed large doublet earthquakes, after a dam experiences a large earthquake, it is recommended that the reservoir be adjusted to a safe water level and maintained at that level for at least one week as an emergency response measure.

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Study on 3-D Dynamic Analysis of Arch Dam Against Strong Earthquake Motion Cosidering Discontinuous Behavior of Joints

Cited by 7 publications

References 6 publications

Characteristics of seismic motions at a concrete gravity dam site and suggestions for setting the engineering bedrock

Characteristics of seismic motions at a concrete gravity dam site and suggestions for setting the engineering bedrock

Analytical study on effects of fracture energy for crack propagation in arch dam during large earthquake

Evaluation of the Material Property and Seismic Performance of a Rockfill Dam During Large Doublet Earthquakes

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