Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations
This study examines the impact of structural frequency under various input excitations on the dynamic behavior of a piled raft (PR) foundation embedded in a dry sand layer. Numerical modeling using the finite element method was evaluated by experimental results from centrifuge test. The findings rev...
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| Format: | Article |
| Language: | English |
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Semnan University
2025-08-01
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| Series: | Journal of Rehabilitation in Civil Engineering |
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| Online Access: | https://civiljournal.semnan.ac.ir/article_9296_d41d8cd98f00b204e9800998ecf8427e.pdf |
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| author | Boshra Razmi Fahime Rafiee Mohammad Hassan Baziar Alireza Saeedi Azizkandi |
| author_facet | Boshra Razmi Fahime Rafiee Mohammad Hassan Baziar Alireza Saeedi Azizkandi |
| author_sort | Boshra Razmi |
| collection | DOAJ |
| description | This study examines the impact of structural frequency under various input excitations on the dynamic behavior of a piled raft (PR) foundation embedded in a dry sand layer. Numerical modeling using the finite element method was evaluated by experimental results from centrifuge test. The findings reveal that the structure's natural frequency, affected by the dynamic characteristics of both the soil and the foundation, is significantly lower than that of the fixed-base condition. However, the structure's frequency changes are independent of the excitation dominant frequency. Furthermore, as the structure's natural frequency rises, the disparity between the fixed-base condition and the foundation-inclusive scenario becomes increasingly pronounced. These changes significantly affect the whole dynamic system responses, precisely the maximum bending moment along the piles. It highlights the importance of considering the soil-structure interaction in the design process. Additionally, when the frequency of the input excitation closely aligns with the system's natural frequency, it induces the most significant dynamic responses in the soil, pile, raft, and structure. Consequently, relying solely on fixed-based methods in design can lead to unrealistic and potentially unsafe technical decisions. |
| format | Article |
| id | doaj-art-51952ce4123d45aba40eee58ecd554ac |
| institution | DOAJ |
| issn | 2345-4415 2345-4423 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Semnan University |
| record_format | Article |
| series | Journal of Rehabilitation in Civil Engineering |
| spelling | doaj-art-51952ce4123d45aba40eee58ecd554ac2025-08-20T03:12:58ZengSemnan UniversityJournal of Rehabilitation in Civil Engineering2345-44152345-44232025-08-0113315016510.22075/jrce.2025.35148.21629296Evaluation of Structure Frequency on the Dynamic Response of Piled Raft FoundationsBoshra Razmi0Fahime Rafiee1Mohammad Hassan Baziar2Alireza Saeedi Azizkandi3Master’s Graduted of Geotechnical Engineering, Iran University of Science and Technology (IUST), Narmak, IranAssistant Professor, School of Engineering, Damghan University, Damghan, IranProfessor, School of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, IranAssociate Professor, School of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, IranThis study examines the impact of structural frequency under various input excitations on the dynamic behavior of a piled raft (PR) foundation embedded in a dry sand layer. Numerical modeling using the finite element method was evaluated by experimental results from centrifuge test. The findings reveal that the structure's natural frequency, affected by the dynamic characteristics of both the soil and the foundation, is significantly lower than that of the fixed-base condition. However, the structure's frequency changes are independent of the excitation dominant frequency. Furthermore, as the structure's natural frequency rises, the disparity between the fixed-base condition and the foundation-inclusive scenario becomes increasingly pronounced. These changes significantly affect the whole dynamic system responses, precisely the maximum bending moment along the piles. It highlights the importance of considering the soil-structure interaction in the design process. Additionally, when the frequency of the input excitation closely aligns with the system's natural frequency, it induces the most significant dynamic responses in the soil, pile, raft, and structure. Consequently, relying solely on fixed-based methods in design can lead to unrealistic and potentially unsafe technical decisions.https://civiljournal.semnan.ac.ir/article_9296_d41d8cd98f00b204e9800998ecf8427e.pdf3-d abaqus simulationfixed-base conditionpiled raft foundationseismicbehaviorsystem frequency |
| spellingShingle | Boshra Razmi Fahime Rafiee Mohammad Hassan Baziar Alireza Saeedi Azizkandi Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations Journal of Rehabilitation in Civil Engineering 3-d abaqus simulation fixed-base condition piled raft foundation seismicbehavior system frequency |
| title | Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations |
| title_full | Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations |
| title_fullStr | Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations |
| title_full_unstemmed | Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations |
| title_short | Evaluation of Structure Frequency on the Dynamic Response of Piled Raft Foundations |
| title_sort | evaluation of structure frequency on the dynamic response of piled raft foundations |
| topic | 3-d abaqus simulation fixed-base condition piled raft foundation seismicbehavior system frequency |
| url | https://civiljournal.semnan.ac.ir/article_9296_d41d8cd98f00b204e9800998ecf8427e.pdf |
| work_keys_str_mv | AT boshrarazmi evaluationofstructurefrequencyonthedynamicresponseofpiledraftfoundations AT fahimerafiee evaluationofstructurefrequencyonthedynamicresponseofpiledraftfoundations AT mohammadhassanbaziar evaluationofstructurefrequencyonthedynamicresponseofpiledraftfoundations AT alirezasaeediazizkandi evaluationofstructurefrequencyonthedynamicresponseofpiledraftfoundations |