Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface
Abstract Floating piles have been widely employed as foundations in coastal regions abounding with marine clay. A growing concern for these floating piles is their long-term performance of bearing capacity. To better understand the time-dependent mechanisms behind the bearing capacity, in this paper...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-37854-y |
| _version_ | 1827910844936093696 |
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| author | Wangjing Yao Tao Zhang Qianshen Chen Jiuchun Sun Sifa Xu Zhouxiang Ding Zhe Wang |
| author_facet | Wangjing Yao Tao Zhang Qianshen Chen Jiuchun Sun Sifa Xu Zhouxiang Ding Zhe Wang |
| author_sort | Wangjing Yao |
| collection | DOAJ |
| description | Abstract Floating piles have been widely employed as foundations in coastal regions abounding with marine clay. A growing concern for these floating piles is their long-term performance of bearing capacity. To better understand the time-dependent mechanisms behind the bearing capacity, in this paper a series of shear creep tests was conducted to study the effects of load paths/steps and roughness on shear strain of the marine clay-concrete interface. Four main empirical features were observed from the experimental results. First, the creep process of the marine clay-concrete interface can be largely decomposed into the instantaneous creep stage, the attenuation creep stage and the uniform creep stage. Second, the creep stability time and the shear creep displacement generally increase as the shear stress level increases. Third, the shear displacement rises as the number of loading steps drops under the same shear stress. The fourth feature is that under the shear stress condition, the rougher the interface is, the smaller the shear displacement is. Besides, the load-unloading shear creep tests suggest that: (a) shear creep displacement typically contains both viscoelastic and viscoplastic deformation; and (b) the proportion of unrecoverable plastic deformation increases with increasing shear stress. These tests confirm that the Nishihara model can provide a well-defined description of the shear creep behavior of marine clay-concrete interfaces. |
| first_indexed | 2024-03-13T01:55:18Z |
| format | Article |
| id | doaj.art-47e6ad45b87a464f9af6411fb3727a07 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-13T01:55:18Z |
| publishDate | 2023-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-47e6ad45b87a464f9af6411fb3727a072023-07-02T11:13:36ZengNature PortfolioScientific Reports2045-23222023-07-0113111010.1038/s41598-023-37854-yEffects of shear stress path and roughness on shear creep behavior of marine clay-concrete interfaceWangjing Yao0Tao Zhang1Qianshen Chen2Jiuchun Sun3Sifa Xu4Zhouxiang Ding5Zhe Wang6Institute of Geotechnical Engineering, Zhejiang University of TechnologyInstitute of Geotechnical Engineering, Zhejiang University of TechnologyInstitute of Geotechnical Engineering, Zhejiang University of TechnologyTengda Construction Group Co. Ltd.Institute of Geotechnical Engineering, Zhejiang University of TechnologyDepartment of Mechanical Engineering, University of SaskatchewanInstitute of Geotechnical Engineering, Zhejiang University of TechnologyAbstract Floating piles have been widely employed as foundations in coastal regions abounding with marine clay. A growing concern for these floating piles is their long-term performance of bearing capacity. To better understand the time-dependent mechanisms behind the bearing capacity, in this paper a series of shear creep tests was conducted to study the effects of load paths/steps and roughness on shear strain of the marine clay-concrete interface. Four main empirical features were observed from the experimental results. First, the creep process of the marine clay-concrete interface can be largely decomposed into the instantaneous creep stage, the attenuation creep stage and the uniform creep stage. Second, the creep stability time and the shear creep displacement generally increase as the shear stress level increases. Third, the shear displacement rises as the number of loading steps drops under the same shear stress. The fourth feature is that under the shear stress condition, the rougher the interface is, the smaller the shear displacement is. Besides, the load-unloading shear creep tests suggest that: (a) shear creep displacement typically contains both viscoelastic and viscoplastic deformation; and (b) the proportion of unrecoverable plastic deformation increases with increasing shear stress. These tests confirm that the Nishihara model can provide a well-defined description of the shear creep behavior of marine clay-concrete interfaces.https://doi.org/10.1038/s41598-023-37854-y |
| spellingShingle | Wangjing Yao Tao Zhang Qianshen Chen Jiuchun Sun Sifa Xu Zhouxiang Ding Zhe Wang Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface Scientific Reports |
| title | Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface |
| title_full | Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface |
| title_fullStr | Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface |
| title_full_unstemmed | Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface |
| title_short | Effects of shear stress path and roughness on shear creep behavior of marine clay-concrete interface |
| title_sort | effects of shear stress path and roughness on shear creep behavior of marine clay concrete interface |
| url | https://doi.org/10.1038/s41598-023-37854-y |
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