Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading
Coral sand is an important filler resource that can solve the shortage of terrestrial fillers in coastal areas. Recently, the foundations of many infrastructures in the South China Sea have been built with coral sand as fillers, which have been subjected to wave and traffic cyclic loads. Resilient m...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/4/287 |
| _version_ | 1797570453229797376 |
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| author | Shao-Heng He Qiong-Fang Zhang Zhi Ding Tang-Dai Xia Xiao-Lu Gan |
| author_facet | Shao-Heng He Qiong-Fang Zhang Zhi Ding Tang-Dai Xia Xiao-Lu Gan |
| author_sort | Shao-Heng He |
| collection | DOAJ |
| description | Coral sand is an important filler resource that can solve the shortage of terrestrial fillers in coastal areas. Recently, the foundations of many infrastructures in the South China Sea have been built with coral sand as fillers, which have been subjected to wave and traffic cyclic loads. Resilient modulus (<i>M</i><sub>r</sub>) is an important design parameter in marine engineering, but there are few studies on the resilient modulus response of coral sand under cyclic loading. A series of drained cyclic triaxial tests were carried out to investigate the effects of the initial mean effective stress (<i>p</i><sub>0</sub>) and cyclic stress ratio (<i>ζ</i>) on the resilient modulus response of the coral sand from the South China Sea. The change of fractal dimension (<i>α</i><sub>c</sub>) can reflect the rule of particle breakage evolution. The <i>α</i><sub>c</sub> of coral sand shows a tendency of almost maintaining stable and then increasing rapidly with the increase of mean effective stress <i>p</i><sub>0</sub> under each cyclic stress ratio <i>ζ</i>. There is a threshold of <i>p</i><sub>0</sub>, when the <i>p</i><sub>0</sub> exceeds this threshold, <i>α</i><sub>c</sub> will increase significantly with the increase of <i>p</i><sub>0</sub>. The increase of <i>p</i><sub>0</sub> has a beneficial effect on the improvement of the <i>M</i><sub>r</sub>, while the increase of <i>ζ</i> has both beneficial and detrimental effects on the improvement of the <i>M</i><sub>r</sub>. A new prediction model of the <i>M</i><sub>r</sub> considering particle breakage was established, which can better predict the <i>M</i><sub>r</sub> of coral sand in the whole stress interval. The research results can provide guidance for the design of marine transportation infrastructures, which can promote the development of marine transportation industry and energy utilization. |
| first_indexed | 2024-03-10T20:24:48Z |
| format | Article |
| id | doaj.art-1108fec7e5464bc1aa58a486b1897329 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T20:24:48Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-1108fec7e5464bc1aa58a486b18973292023-11-19T21:50:17ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-04-018428710.3390/jmse8040287Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic LoadingShao-Heng He0Qiong-Fang Zhang1Zhi Ding2Tang-Dai Xia3Xiao-Lu Gan4Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaPower China Huadong Engineering Corporation, Hangzhou 310014, ChinaDepartment of Civil Engineering, Zhejiang University City College, Hangzhou 310015, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaCoral sand is an important filler resource that can solve the shortage of terrestrial fillers in coastal areas. Recently, the foundations of many infrastructures in the South China Sea have been built with coral sand as fillers, which have been subjected to wave and traffic cyclic loads. Resilient modulus (<i>M</i><sub>r</sub>) is an important design parameter in marine engineering, but there are few studies on the resilient modulus response of coral sand under cyclic loading. A series of drained cyclic triaxial tests were carried out to investigate the effects of the initial mean effective stress (<i>p</i><sub>0</sub>) and cyclic stress ratio (<i>ζ</i>) on the resilient modulus response of the coral sand from the South China Sea. The change of fractal dimension (<i>α</i><sub>c</sub>) can reflect the rule of particle breakage evolution. The <i>α</i><sub>c</sub> of coral sand shows a tendency of almost maintaining stable and then increasing rapidly with the increase of mean effective stress <i>p</i><sub>0</sub> under each cyclic stress ratio <i>ζ</i>. There is a threshold of <i>p</i><sub>0</sub>, when the <i>p</i><sub>0</sub> exceeds this threshold, <i>α</i><sub>c</sub> will increase significantly with the increase of <i>p</i><sub>0</sub>. The increase of <i>p</i><sub>0</sub> has a beneficial effect on the improvement of the <i>M</i><sub>r</sub>, while the increase of <i>ζ</i> has both beneficial and detrimental effects on the improvement of the <i>M</i><sub>r</sub>. A new prediction model of the <i>M</i><sub>r</sub> considering particle breakage was established, which can better predict the <i>M</i><sub>r</sub> of coral sand in the whole stress interval. The research results can provide guidance for the design of marine transportation infrastructures, which can promote the development of marine transportation industry and energy utilization.https://www.mdpi.com/2077-1312/8/4/287coral sandresilient modulusparticle breakagefractal dimensionprediction model |
| spellingShingle | Shao-Heng He Qiong-Fang Zhang Zhi Ding Tang-Dai Xia Xiao-Lu Gan Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading Journal of Marine Science and Engineering coral sand resilient modulus particle breakage fractal dimension prediction model |
| title | Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading |
| title_full | Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading |
| title_fullStr | Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading |
| title_full_unstemmed | Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading |
| title_short | Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading |
| title_sort | experimental and estimation studies of resilient modulus of marine coral sand under cyclic loading |
| topic | coral sand resilient modulus particle breakage fractal dimension prediction model |
| url | https://www.mdpi.com/2077-1312/8/4/287 |
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