Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading
This study integrates macroscopic dynamic triaxial tests with microscopic discrete element simulations to comprehensively examine the dynamic deformation characteristics of marine soft soils under cyclic loading. Unlike previous research that typically focuses solely on experimental or numerical met...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/12/12/2307 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850086224077783040 |
|---|---|
| author | Yajun Liu Heng Zhang Yindong Sun Ke Wu Wenbin Xiao |
| author_facet | Yajun Liu Heng Zhang Yindong Sun Ke Wu Wenbin Xiao |
| author_sort | Yajun Liu |
| collection | DOAJ |
| description | This study integrates macroscopic dynamic triaxial tests with microscopic discrete element simulations to comprehensively examine the dynamic deformation characteristics of marine soft soils under cyclic loading. Unlike previous research that typically focuses solely on experimental or numerical methods, this approach combines both techniques to enable a holistic analysis of soil behavior. The dynamic triaxial tests assessed macroscopic responses, including strain evolution and energy dissipation, under varying dynamic stress ratios, confining pressures, and water contents. Concurrently, discrete element simulations uncovered the microscopic mechanisms driving these behaviors, such as particle rearrangement, porosity variations, and shear zone development. The results show that (1) The strain range of marine soft soils increases significantly with higher dynamic stress ratios, confining pressures, and water contents; (2) Cumulative dynamic strain and particle displacement intensify at water contents of 50% and 55%. However, at a water content of 60%, the samples exhibit significant damage characterized by the formation of shear bands throughout the entire specimen; (3) As water content increases, energy dissipation in marine soft soils accelerates under lower confining pressures but increases more gradually under higher confining pressures. This behavior is attributed to enhanced particle packing and reduced pore space at elevated confining pressures. This integrated methodology not only enhances analytical capabilities but also provides valuable engineering insights into the dynamic response of marine soft soils. The findings offer essential guidance for the design and stabilization of marine soft soil infrastructure in coastal urban areas. |
| format | Article |
| id | doaj-art-fbae256d92f94c45ae2d2459671fca01 |
| institution | DOAJ |
| issn | 2077-1312 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-fbae256d92f94c45ae2d2459671fca012025-08-20T02:43:32ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-12-011212230710.3390/jmse12122307Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic LoadingYajun Liu0Heng Zhang1Yindong Sun2Ke Wu3Wenbin Xiao4School of Civil Engineering, Shandong University, Jinan 250061, ChinaSchool of Civil Engineering, Shandong University, Jinan 250061, ChinaSchool of Civil Engineering, Shandong University, Jinan 250061, ChinaSchool of Civil Engineering, Shandong University, Jinan 250061, ChinaSchool of Civil Engineering, Shandong University, Jinan 250061, ChinaThis study integrates macroscopic dynamic triaxial tests with microscopic discrete element simulations to comprehensively examine the dynamic deformation characteristics of marine soft soils under cyclic loading. Unlike previous research that typically focuses solely on experimental or numerical methods, this approach combines both techniques to enable a holistic analysis of soil behavior. The dynamic triaxial tests assessed macroscopic responses, including strain evolution and energy dissipation, under varying dynamic stress ratios, confining pressures, and water contents. Concurrently, discrete element simulations uncovered the microscopic mechanisms driving these behaviors, such as particle rearrangement, porosity variations, and shear zone development. The results show that (1) The strain range of marine soft soils increases significantly with higher dynamic stress ratios, confining pressures, and water contents; (2) Cumulative dynamic strain and particle displacement intensify at water contents of 50% and 55%. However, at a water content of 60%, the samples exhibit significant damage characterized by the formation of shear bands throughout the entire specimen; (3) As water content increases, energy dissipation in marine soft soils accelerates under lower confining pressures but increases more gradually under higher confining pressures. This behavior is attributed to enhanced particle packing and reduced pore space at elevated confining pressures. This integrated methodology not only enhances analytical capabilities but also provides valuable engineering insights into the dynamic response of marine soft soils. The findings offer essential guidance for the design and stabilization of marine soft soil infrastructure in coastal urban areas.https://www.mdpi.com/2077-1312/12/12/2307mechanical behaviormarine soft soilcyclic loadingdynamic triaxial testparticle flow analysis |
| spellingShingle | Yajun Liu Heng Zhang Yindong Sun Ke Wu Wenbin Xiao Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading Journal of Marine Science and Engineering mechanical behavior marine soft soil cyclic loading dynamic triaxial test particle flow analysis |
| title | Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading |
| title_full | Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading |
| title_fullStr | Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading |
| title_full_unstemmed | Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading |
| title_short | Mechanical Behavior of Marine Soft Soil with Different Water Contents Under Cyclic Loading |
| title_sort | mechanical behavior of marine soft soil with different water contents under cyclic loading |
| topic | mechanical behavior marine soft soil cyclic loading dynamic triaxial test particle flow analysis |
| url | https://www.mdpi.com/2077-1312/12/12/2307 |
| work_keys_str_mv | AT yajunliu mechanicalbehaviorofmarinesoftsoilwithdifferentwatercontentsundercyclicloading AT hengzhang mechanicalbehaviorofmarinesoftsoilwithdifferentwatercontentsundercyclicloading AT yindongsun mechanicalbehaviorofmarinesoftsoilwithdifferentwatercontentsundercyclicloading AT kewu mechanicalbehaviorofmarinesoftsoilwithdifferentwatercontentsundercyclicloading AT wenbinxiao mechanicalbehaviorofmarinesoftsoilwithdifferentwatercontentsundercyclicloading |