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Experimental investigation of shear modulus and damping ratio of saturated marine coral sand: Effects of frequency.

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Title: Experimental investigation of shear modulus and damping ratio of saturated marine coral sand: Effects of frequency.
Authors: Qin, You1,2,3 (AUTHOR), Guo, Hao4 (AUTHOR), Long, Hui3 (AUTHOR), Shan, Zhen-Dong1,2 (AUTHOR), Wu, Qi4 (AUTHOR), Zhuang, Hai-Yang5 (AUTHOR), Chen, Guo-Xing4 (AUTHOR) gxc6307@163.com
Source: Marine Georesources & Geotechnology. Dec2025, Vol. 43 Issue 12, p2368-2382. 15p.
Subjects: Modulus of rigidity, Damping capacity, Deformations (Mechanics), Strains & stresses (Mechanics), Cyclic loads, Measurement of shear strength, Prediction models
Abstract: The dynamic deformation characteristics of saturated sands are considerably influenced by the loading frequency (f). Nevertheless, the effect of f on the deformation behavior of saturated coral sand (CS) has not been comprehensively investigated. This study aims to investigate how frequency (0.01‒4Hz) affects the shear modulus (G) and damping ratio (λ) characteristics of CS through a series of cyclic shear tests. The experimental results demonstrate that, under consistent initial conditions, both the strain-dependent G and λ increase as f increases. Moreover, there is a linear relationship between the maximum shear modulus (G0) and small strain damping ratio (λmin) with ln(f). Specifically, the regularized G of CS remains unaffected by variations in f. To facilitate the prediction of G in CS at different f, we propose a prediction equation that integrates the revised Hardin's model and Davidenkov skeleton curve. Besides, a power function expression is suggested for λ−λmin versus G/G0 to predict λ in CS at different f. The revised equations for G and λ are validated using experimental data from natural sands in the literature, confirming their suitability for evaluating strain-dependent G and λ values of natural sandy soils over a wide strain range. [ABSTRACT FROM AUTHOR]
Copyright of Marine Georesources & Geotechnology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Experimental investigation of shear modulus and damping ratio of saturated marine coral sand: Effects of frequency.
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  Data: <searchLink fieldCode="AR" term="%22Qin%2C+You%22">Qin, You</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Hao%22">Guo, Hao</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Long%2C+Hui%22">Long, Hui</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shan%2C+Zhen-Dong%22">Shan, Zhen-Dong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Qi%22">Wu, Qi</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhuang%2C+Hai-Yang%22">Zhuang, Hai-Yang</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Guo-Xing%22">Chen, Guo-Xing</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> gxc6307@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Marine+Georesources+%26+Geotechnology%22">Marine Georesources & Geotechnology</searchLink>. Dec2025, Vol. 43 Issue 12, p2368-2382. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Modulus+of+rigidity%22">Modulus of rigidity</searchLink><br /><searchLink fieldCode="DE" term="%22Damping+capacity%22">Damping capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclic+loads%22">Cyclic loads</searchLink><br /><searchLink fieldCode="DE" term="%22Measurement+of+shear+strength%22">Measurement of shear strength</searchLink><br /><searchLink fieldCode="DE" term="%22Prediction+models%22">Prediction models</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The dynamic deformation characteristics of saturated sands are considerably influenced by the loading frequency (f). Nevertheless, the effect of f on the deformation behavior of saturated coral sand (CS) has not been comprehensively investigated. This study aims to investigate how frequency (0.01‒4Hz) affects the shear modulus (G) and damping ratio (λ) characteristics of CS through a series of cyclic shear tests. The experimental results demonstrate that, under consistent initial conditions, both the strain-dependent G and λ increase as f increases. Moreover, there is a linear relationship between the maximum shear modulus (G0) and small strain damping ratio (λmin) with ln(f). Specifically, the regularized G of CS remains unaffected by variations in f. To facilitate the prediction of G in CS at different f, we propose a prediction equation that integrates the revised Hardin's model and Davidenkov skeleton curve. Besides, a power function expression is suggested for λ−λmin versus G/G0 to predict λ in CS at different f. The revised equations for G and λ are validated using experimental data from natural sands in the literature, confirming their suitability for evaluating strain-dependent G and λ values of natural sandy soils over a wide strain range. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Marine Georesources & Geotechnology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/1064119X.2025.2462769
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 2368
    Subjects:
      – SubjectFull: Modulus of rigidity
        Type: general
      – SubjectFull: Damping capacity
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Cyclic loads
        Type: general
      – SubjectFull: Measurement of shear strength
        Type: general
      – SubjectFull: Prediction models
        Type: general
    Titles:
      – TitleFull: Experimental investigation of shear modulus and damping ratio of saturated marine coral sand: Effects of frequency.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Qin, You
      – PersonEntity:
          Name:
            NameFull: Guo, Hao
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            NameFull: Long, Hui
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            NameFull: Shan, Zhen-Dong
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            NameFull: Wu, Qi
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            NameFull: Zhuang, Hai-Yang
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            NameFull: Chen, Guo-Xing
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          Dates:
            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 1064119X
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              Value: 43
            – Type: issue
              Value: 12
          Titles:
            – TitleFull: Marine Georesources & Geotechnology
              Type: main
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