Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay
Thesis (M.S.) -- Civil and Environmental Engineering, May 2024.
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| Format: | masterThesis |
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2024
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| Online Access: | http://hdl.handle.net/10725/16013 https://doi.org/10.26756/th.2023.696 http://libraries.lau.edu.lb/research/laur/terms-of-use/thesis.php |
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| _version_ | 1864513471870140416 |
|---|---|
| author | Saad, Gaby Michel |
| author_facet | Saad, Gaby Michel |
| author_role | author |
| dc.creator.none.fl_str_mv | Saad, Gaby Michel |
| dc.date.none.fl_str_mv | 2024-08-23T10:17:41Z 2024-08-23T10:17:41Z 2024 2024-05-23 |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10725/16013 https://doi.org/10.26756/th.2023.696 http://libraries.lau.edu.lb/research/laur/terms-of-use/thesis.php |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | Lebanese American University |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Soil-structure interaction -- Mathematical models Structural analysis (Engineering) Soil mechanics -- Mathematical models Finite element method Lebanese American University -- Dissertations Dissertations, Academic |
| dc.title.none.fl_str_mv | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| dc.type.none.fl_str_mv | Thesis info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/masterThesis |
| description | Thesis (M.S.) -- Civil and Environmental Engineering, May 2024. |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| id | LAURepo_dcce4fbf48acb9664fc1eed3c54f93b6 |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/16013 |
| publishDate | 2024 |
| publisher.none.fl_str_mv | Lebanese American University |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in ClaySaad, Gaby MichelSoil-structure interaction -- Mathematical modelsStructural analysis (Engineering)Soil mechanics -- Mathematical modelsFinite element methodLebanese American University -- DissertationsDissertations, AcademicThesis (M.S.) -- Civil and Environmental Engineering, May 2024.The interaction between mat foundations and the supporting soil is often simplified by assuming that the mat foundation rests on uncoupled Winkler springs representing the soil medium. This assumption results in a uniform distribution of the modulus of subgrade reaction which leads to erroneous results that mispredicts bending moments within the mat foundation. Previous studies tackled these problems by examining the distribution of the Winkler spring stiffness throughout the mat foundation to achieve more realistic results by considering the soil as a continuum medium. However, these studies only focused on the elastic behavior of soil or elastoplastic behavior under constant volume (undrained conditions). This thesis aims to understand the effects of plastic strains and volume changes that happen due to the consolidation of clayey soils. For this purpose, three-dimensional parametric analysis of slabs resting on elastoplastic soil are performed using the finite element software ANSYS for various soil characteristics and loading configurations under drained conditions. The soil behavior is simulated using the Modified Cam Clay constitutive model. The results show that the assumption of a linear elastic soil overpredicts the soil’s stiffness and the bending moments in mat foundations. Acknowledging the elastoplastic behavior of the soil is crucial for mat foundation design. Effort was also made to provide a practical design method that would generate outcomes resembling those of an elastoplastic continuum finite element analysis by comparing different methods of subgrade analysis. It was found that the discrete area method is most suitable for this purpose.1 online resource (xx, 141 leaves): ill. (some col.)Includes bibliographical references (leaves 110-112)Lebanese American University2024-08-23T10:17:41Z2024-08-23T10:17:41Z20242024-05-23Thesisinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/10725/16013https://doi.org/10.26756/th.2023.696http://libraries.lau.edu.lb/research/laur/terms-of-use/thesis.phpeninfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/160132024-12-11T07:02:53Z |
| spellingShingle | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay Saad, Gaby Michel Soil-structure interaction -- Mathematical models Structural analysis (Engineering) Soil mechanics -- Mathematical models Finite element method Lebanese American University -- Dissertations Dissertations, Academic |
| status_str | publishedVersion |
| title | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| title_full | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| title_fullStr | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| title_full_unstemmed | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| title_short | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| title_sort | Investigating the Distribution of the Modulus of Subgrade Reaction for the Structural Design of Mat Foundations in Clay |
| topic | Soil-structure interaction -- Mathematical models Structural analysis (Engineering) Soil mechanics -- Mathematical models Finite element method Lebanese American University -- Dissertations Dissertations, Academic |
| url | http://hdl.handle.net/10725/16013 https://doi.org/10.26756/th.2023.696 http://libraries.lau.edu.lb/research/laur/terms-of-use/thesis.php |