The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions
To address loading and unloading issues in civil and hydraulic engineering projects that employ coarse-grained soil as fill material under plane strain conditions during construction and operation, cyclic loading–unloading large-scale plane strain tests were conducted on two types of coarse-grained...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/2075-5309/14/1/200 |
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| author | Zhi Wang Shuai Shao Shengjun Shao Liguo Yang |
| author_facet | Zhi Wang Shuai Shao Shengjun Shao Liguo Yang |
| author_sort | Zhi Wang |
| collection | DOAJ |
| description | To address loading and unloading issues in civil and hydraulic engineering projects that employ coarse-grained soil as fill material under plane strain conditions during construction and operation, cyclic loading–unloading large-scale plane strain tests were conducted on two types of coarse-grained soils. The effects of coarse-grained soil properties on shear behavior and various modulus relationships were analyzed. The research results showed that coarse-grained soils with better particle roundness exhibit significant shear dilation deformation; it was also found that low parent rock strength can lead to strain softening, and an increase in confining pressure suppresses shear dilation deformation. During the cyclic loading–unloading process, the initial unloading modulus (<i>E</i><sub>iu</sub>) > unloading–reloading modulus (<i>E</i><sub>ur</sub>) > initial reloading modulus (<i>E</i><sub>ir</sub>) > initial tangent modulus (<i>E</i><sub>i</sub>), with the unloading modulus considerably greater than the others. In finite element simulations and model calculations, it is essential to select appropriate modulus parameters based on the stress conditions of the soil to ensure calculation accuracy. In this work, an elastoplastic and nonlinear elastic theory was used to establish a cyclic loading–unloading constitutive model. By comparing the values obtained using this model with experimental measurements, it was found that the model can reasonably predict stress–strain variations during cyclic loading–unloading of coarse-grained soils under plane strain conditions. |
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| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T09:56:17Z |
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| spelling | doaj.art-e151d041b987401aaded720e7d40a1682024-01-29T13:49:12ZengMDPI AGBuildings2075-53092024-01-0114120010.3390/buildings14010200The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain ConditionsZhi Wang0Shuai Shao1Shengjun Shao2Liguo Yang3Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaDepartment of Architecture and Urban Planning, Xi’an University of Technology, Xi’an 710048, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaDepartment of Civil and Traffic Engineering, Yellow River Conservancy Technical Institute, Kaifeng 475003, ChinaTo address loading and unloading issues in civil and hydraulic engineering projects that employ coarse-grained soil as fill material under plane strain conditions during construction and operation, cyclic loading–unloading large-scale plane strain tests were conducted on two types of coarse-grained soils. The effects of coarse-grained soil properties on shear behavior and various modulus relationships were analyzed. The research results showed that coarse-grained soils with better particle roundness exhibit significant shear dilation deformation; it was also found that low parent rock strength can lead to strain softening, and an increase in confining pressure suppresses shear dilation deformation. During the cyclic loading–unloading process, the initial unloading modulus (<i>E</i><sub>iu</sub>) > unloading–reloading modulus (<i>E</i><sub>ur</sub>) > initial reloading modulus (<i>E</i><sub>ir</sub>) > initial tangent modulus (<i>E</i><sub>i</sub>), with the unloading modulus considerably greater than the others. In finite element simulations and model calculations, it is essential to select appropriate modulus parameters based on the stress conditions of the soil to ensure calculation accuracy. In this work, an elastoplastic and nonlinear elastic theory was used to establish a cyclic loading–unloading constitutive model. By comparing the values obtained using this model with experimental measurements, it was found that the model can reasonably predict stress–strain variations during cyclic loading–unloading of coarse-grained soils under plane strain conditions.https://www.mdpi.com/2075-5309/14/1/200plane straincoarse-grained soilloading–unloadingconstitutive model |
| spellingShingle | Zhi Wang Shuai Shao Shengjun Shao Liguo Yang The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions Buildings plane strain coarse-grained soil loading–unloading constitutive model |
| title | The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions |
| title_full | The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions |
| title_fullStr | The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions |
| title_full_unstemmed | The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions |
| title_short | The Mechanical Behavior and Constitutive Model Study of Coarse-Grained Soil under Cyclic Loading–Unloading in Large-Scale Plane Strain Conditions |
| title_sort | mechanical behavior and constitutive model study of coarse grained soil under cyclic loading unloading in large scale plane strain conditions |
| topic | plane strain coarse-grained soil loading–unloading constitutive model |
| url | https://www.mdpi.com/2075-5309/14/1/200 |
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