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Seismic Response of Bridge Pile Foundation in Permafrost Incorporating Advanced Pile-Soil Dynamic Interaction Model
https://orcid.org/http://orcid.org/0009-0001-1533-1318
https://orcid.org/http://orcid.org/0000-0002-4523-5001
https://orcid.org/http://orcid.org/0009-0003-1459-8912
https://orcid.org/http://orcid.org/0000-0002-4736-9775
High-rise pile cap foundations play a crucial role in bridge engineering within permafrost regions. This study aims to investigate the seismic response of bridge pile foundations with high-rise caps during both cold and warm seasons. Initially, the existing dynamic analysis model of pile-soil interaction is enhanced. Subsequently, a dynamic analysis finite element model incorporating pile-soil interaction is established, focusing on a bridge pile foundation with a high-rise cap along the Qinghai-Tibet Railway. The seismic response of the bridge pile foundation in the permafrost region under varying seasonal conditions is analyzed. Compared with thawed active layer condition, the acceleration response at the pier top is larger, the maximum shear force and moment of the pile foundation are larger under the frozen active layer condition. After the thawing of the active layer, the pile foundation and the pier top lateral displacement of increases significantly, and the residual gap between the pile-soil increases during earthquake. The pile plastic zone length is small and mainly concentrated near the soil surface when the active layer is frozen, while the pile plastic zone length increases after the thawing of the active layer, and the severe damages occur near the freezing and thawing interface of the soil layer.
Seismic Response of Bridge Pile Foundation in Permafrost Incorporating Advanced Pile-Soil Dynamic Interaction Model
https://orcid.org/http://orcid.org/0009-0001-1533-1318
https://orcid.org/http://orcid.org/0000-0002-4523-5001
https://orcid.org/http://orcid.org/0009-0003-1459-8912
https://orcid.org/http://orcid.org/0000-0002-4736-9775
High-rise pile cap foundations play a crucial role in bridge engineering within permafrost regions. This study aims to investigate the seismic response of bridge pile foundations with high-rise caps during both cold and warm seasons. Initially, the existing dynamic analysis model of pile-soil interaction is enhanced. Subsequently, a dynamic analysis finite element model incorporating pile-soil interaction is established, focusing on a bridge pile foundation with a high-rise cap along the Qinghai-Tibet Railway. The seismic response of the bridge pile foundation in the permafrost region under varying seasonal conditions is analyzed. Compared with thawed active layer condition, the acceleration response at the pier top is larger, the maximum shear force and moment of the pile foundation are larger under the frozen active layer condition. After the thawing of the active layer, the pile foundation and the pier top lateral displacement of increases significantly, and the residual gap between the pile-soil increases during earthquake. The pile plastic zone length is small and mainly concentrated near the soil surface when the active layer is frozen, while the pile plastic zone length increases after the thawing of the active layer, and the severe damages occur near the freezing and thawing interface of the soil layer.
Seismic Response of Bridge Pile Foundation in Permafrost Incorporating Advanced Pile-Soil Dynamic Interaction Model
https://orcid.org/http://orcid.org/0009-0001-1533-1318
https://orcid.org/http://orcid.org/0000-0002-4523-5001
https://orcid.org/http://orcid.org/0009-0003-1459-8912
https://orcid.org/http://orcid.org/0000-0002-4736-9775
High-rise pile cap foundations play a crucial role in bridge engineering within permafrost regions. This study aims to investigate the seismic response of bridge pile foundations with high-rise caps during both cold and warm seasons. Initially, the existing dynamic analysis model of pile-soil interaction is enhanced. Subsequently, a dynamic analysis finite element model incorporating pile-soil interaction is established, focusing on a bridge pile foundation with a high-rise cap along the Qinghai-Tibet Railway. The seismic response of the bridge pile foundation in the permafrost region under varying seasonal conditions is analyzed. Compared with thawed active layer condition, the acceleration response at the pier top is larger, the maximum shear force and moment of the pile foundation are larger under the frozen active layer condition. After the thawing of the active layer, the pile foundation and the pier top lateral displacement of increases significantly, and the residual gap between the pile-soil increases during earthquake. The pile plastic zone length is small and mainly concentrated near the soil surface when the active layer is frozen, while the pile plastic zone length increases after the thawing of the active layer, and the severe damages occur near the freezing and thawing interface of the soil layer.
Seismic Response of Bridge Pile Foundation in Permafrost Incorporating Advanced Pile-Soil Dynamic Interaction Model
Lecture Notes in Civil Engineering
Guo, Wei (editor) / Qian, Kai (editor) / Tang, Honggang (editor) / Gong, Lei (editor) / Yu, Shengsheng (author) / Zhang, Xiyin (author) / Wang, Wanping (author) / Guan, Jiada (author)
International Conference on Green Building, Civil Engineering and Smart City ; 2023 ; Guiyang, China
2024-02-02
9 pages
Article/Chapter (Book)
Electronic Resource
English
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