Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade
To calculate and analyze the equivalent resilient modulus of a submerged subgrade, a constitutive model considering the effect of saturation and matrix suction was introduced using ABAQUS’s user-defined material (UMAT)subroutine. The pavement response under falling weight deflectometer (FWD) load wa...
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MDPI AG
2024-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/4/949 |
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| author | Junyao Tang Siyu Chen Tao Ma Binshuang Zheng Xiaoming Huang |
| author_facet | Junyao Tang Siyu Chen Tao Ma Binshuang Zheng Xiaoming Huang |
| author_sort | Junyao Tang |
| collection | DOAJ |
| description | To calculate and analyze the equivalent resilient modulus of a submerged subgrade, a constitutive model considering the effect of saturation and matrix suction was introduced using ABAQUS’s user-defined material (UMAT)subroutine. The pavement response under falling weight deflectometer (FWD) load was simulated at various water levels based on the derived distribution of the resilient modulus within the subgrade. The equivalent resilient modulus of the subgrade was then calculated using the equivalent iteration and weighted average methods. Based on this, the influence of the material and structural parameters of the subgrade was analyzed. The results indicate that the effect of water level rise on the tensile strain at the bottom of the asphalt layer and the compressive strain at the top of the subgrade is obvious, and its trend is similar to an exponential change. The equivalent resilient modulus of the subgrade basically decreases linearly with the rise in the water level, and there is high consistency between the equivalent iteration and weighted average methods. The saturated permeability coefficient and subgrade height have the most significant effect on the resilient modulus of the subgrade, which should be emphasized in the design of submerged subgrades, and the suggested values of the resilient modulus of the subgrade should be proposed according to the relevant construction conditions. |
| first_indexed | 2024-03-07T22:22:29Z |
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| id | doaj.art-15a72d1ce08c4851b8b8d740fa4f48fd |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-07T22:22:29Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-15a72d1ce08c4851b8b8d740fa4f48fd2024-02-23T15:25:54ZengMDPI AGMaterials1996-19442024-02-0117494910.3390/ma17040949Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged SubgradeJunyao Tang0Siyu Chen1Tao Ma2Binshuang Zheng3Xiaoming Huang4School of Transportation, Southeast University, Nanjing 211189, ChinaSchool of Transportation, Southeast University, Nanjing 211189, ChinaSchool of Transportation, Southeast University, Nanjing 211189, ChinaSchool of Modern Posts, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaSchool of Transportation, Southeast University, Nanjing 211189, ChinaTo calculate and analyze the equivalent resilient modulus of a submerged subgrade, a constitutive model considering the effect of saturation and matrix suction was introduced using ABAQUS’s user-defined material (UMAT)subroutine. The pavement response under falling weight deflectometer (FWD) load was simulated at various water levels based on the derived distribution of the resilient modulus within the subgrade. The equivalent resilient modulus of the subgrade was then calculated using the equivalent iteration and weighted average methods. Based on this, the influence of the material and structural parameters of the subgrade was analyzed. The results indicate that the effect of water level rise on the tensile strain at the bottom of the asphalt layer and the compressive strain at the top of the subgrade is obvious, and its trend is similar to an exponential change. The equivalent resilient modulus of the subgrade basically decreases linearly with the rise in the water level, and there is high consistency between the equivalent iteration and weighted average methods. The saturated permeability coefficient and subgrade height have the most significant effect on the resilient modulus of the subgrade, which should be emphasized in the design of submerged subgrades, and the suggested values of the resilient modulus of the subgrade should be proposed according to the relevant construction conditions.https://www.mdpi.com/1996-1944/17/4/949submerged subgradeequivalent resilient modulusconstitutive modelfinite element methodfluid–solid coupling |
| spellingShingle | Junyao Tang Siyu Chen Tao Ma Binshuang Zheng Xiaoming Huang Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade Materials submerged subgrade equivalent resilient modulus constitutive model finite element method fluid–solid coupling |
| title | Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade |
| title_full | Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade |
| title_fullStr | Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade |
| title_full_unstemmed | Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade |
| title_short | Calculation of and Key Influencing Factors Analysis on Equivalent Resilient Modulus of a Submerged Subgrade |
| title_sort | calculation of and key influencing factors analysis on equivalent resilient modulus of a submerged subgrade |
| topic | submerged subgrade equivalent resilient modulus constitutive model finite element method fluid–solid coupling |
| url | https://www.mdpi.com/1996-1944/17/4/949 |
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