An elastoplastic constitutive model for assessing ground settlements induced by deep excavations
Ground movements induced by deep excavations may cause damages on neighboring existing buildings. Finite element simulations generally give acceptable estimates of the horizontal displacements of the retaining wall, but results are less satisfactory for the vertical displacements of the ground surfa...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Sciendo
2023-09-01
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| Series: | Studia Geotechnica et Mechanica |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/sgem-2023-0011 |
| _version_ | 1797661004924977152 |
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| author | El-Arja Hiba Burlon Sébastien Bourgeois Emmanuel |
| author_facet | El-Arja Hiba Burlon Sébastien Bourgeois Emmanuel |
| author_sort | El-Arja Hiba |
| collection | DOAJ |
| description | Ground movements induced by deep excavations may cause damages on neighboring existing buildings. Finite element simulations generally give acceptable estimates of the horizontal displacements of the retaining wall, but results are less satisfactory for the vertical displacements of the ground surface behind the structure. A possible explanation is that most constitutive models describe volumetric strains in a simplified way. This paper proposes an elastoplastic constitutive model aimed at improving the prediction of vertical displacements behind retaining walls. The model comprises a single plastic mechanism with isotropic strain hardening, but has a specific flow rule that allows to generate contractive plastic strains. Identification of the parameters based on triaxial tests is explained and illustrated by an example of calibration. A numerical analysis of a well-documented sheet pile wall in sand in Hochstetten (Germany) is presented. The results given by the model are compared with the measurements and with those obtained using the Hardening Soil Model. The potential advantages of the proposed model are then discussed. |
| first_indexed | 2024-03-11T18:38:10Z |
| format | Article |
| id | doaj.art-c249d5266bc840bf8c82d362544b2c75 |
| institution | Directory Open Access Journal |
| issn | 2083-831X |
| language | English |
| last_indexed | 2024-03-11T18:38:10Z |
| publishDate | 2023-09-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Studia Geotechnica et Mechanica |
| spelling | doaj.art-c249d5266bc840bf8c82d362544b2c752023-10-12T14:09:01ZengSciendoStudia Geotechnica et Mechanica2083-831X2023-09-0145323124510.2478/sgem-2023-0011An elastoplastic constitutive model for assessing ground settlements induced by deep excavationsEl-Arja Hiba0Burlon Sébastien1Bourgeois Emmanuel2Univ Gustave Eiffel, Marne-la-Vallée, FranceTerrasol Setec, Paris, FranceUniv Gustave Eiffel, Marne-la-Vallée, FranceGround movements induced by deep excavations may cause damages on neighboring existing buildings. Finite element simulations generally give acceptable estimates of the horizontal displacements of the retaining wall, but results are less satisfactory for the vertical displacements of the ground surface behind the structure. A possible explanation is that most constitutive models describe volumetric strains in a simplified way. This paper proposes an elastoplastic constitutive model aimed at improving the prediction of vertical displacements behind retaining walls. The model comprises a single plastic mechanism with isotropic strain hardening, but has a specific flow rule that allows to generate contractive plastic strains. Identification of the parameters based on triaxial tests is explained and illustrated by an example of calibration. A numerical analysis of a well-documented sheet pile wall in sand in Hochstetten (Germany) is presented. The results given by the model are compared with the measurements and with those obtained using the Hardening Soil Model. The potential advantages of the proposed model are then discussed.https://doi.org/10.2478/sgem-2023-0011deep excavationssettlementsconstitutive modelfinite element methodelastoplastic model |
| spellingShingle | El-Arja Hiba Burlon Sébastien Bourgeois Emmanuel An elastoplastic constitutive model for assessing ground settlements induced by deep excavations Studia Geotechnica et Mechanica deep excavations settlements constitutive model finite element method elastoplastic model |
| title | An elastoplastic constitutive model for assessing ground settlements induced by deep excavations |
| title_full | An elastoplastic constitutive model for assessing ground settlements induced by deep excavations |
| title_fullStr | An elastoplastic constitutive model for assessing ground settlements induced by deep excavations |
| title_full_unstemmed | An elastoplastic constitutive model for assessing ground settlements induced by deep excavations |
| title_short | An elastoplastic constitutive model for assessing ground settlements induced by deep excavations |
| title_sort | elastoplastic constitutive model for assessing ground settlements induced by deep excavations |
| topic | deep excavations settlements constitutive model finite element method elastoplastic model |
| url | https://doi.org/10.2478/sgem-2023-0011 |
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