Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Modeling of Pullout Capacity of Screw Piles Under Seismic Loading in Layered Soil
https://orcid.org/http://orcid.org/0000-0003-1304-0303
Steel screw piles are deep foundation made of a square or circular shaft with one or more screw bearing plates. This study focused on numerical modeling of pullout behavior of screw piles installed in layered soil and subjected to seismic loading. Five models of screw piles were analyzed numerically using PLAXIS 3D software. All screw piles were subjected to a static uplift load, among which two were subjected to additional seismic loading. The seismic loading represents the range of peak ground acceleration (0.25 g and 0.47 g) of earthquakes that hit Baghdad city in the last few years. The pullout failure load was assumed corresponding to a displacement of around 5% of the helix diameter obtained from numerical analysis, which gave quite similar values to those recorded experimentally. Individual plate bearing was the failure pattern for a screw pile with a spacing to diameter ratio of S/D = 3, while cylindrical shear failure was the failure pattern for a screw pile with S/D = 2. The results obtained from the numerical models revealed a significant influence for the number of helix plates on the axial displacement and failure pullout capacity of screw pile under the effect of seismic loading, while the number of screw bearing plates has very slight effect on the lateral displacement.
Numerical Modeling of Pullout Capacity of Screw Piles Under Seismic Loading in Layered Soil
https://orcid.org/http://orcid.org/0000-0003-1304-0303
Steel screw piles are deep foundation made of a square or circular shaft with one or more screw bearing plates. This study focused on numerical modeling of pullout behavior of screw piles installed in layered soil and subjected to seismic loading. Five models of screw piles were analyzed numerically using PLAXIS 3D software. All screw piles were subjected to a static uplift load, among which two were subjected to additional seismic loading. The seismic loading represents the range of peak ground acceleration (0.25 g and 0.47 g) of earthquakes that hit Baghdad city in the last few years. The pullout failure load was assumed corresponding to a displacement of around 5% of the helix diameter obtained from numerical analysis, which gave quite similar values to those recorded experimentally. Individual plate bearing was the failure pattern for a screw pile with a spacing to diameter ratio of S/D = 3, while cylindrical shear failure was the failure pattern for a screw pile with S/D = 2. The results obtained from the numerical models revealed a significant influence for the number of helix plates on the axial displacement and failure pullout capacity of screw pile under the effect of seismic loading, while the number of screw bearing plates has very slight effect on the lateral displacement.
Numerical Modeling of Pullout Capacity of Screw Piles Under Seismic Loading in Layered Soil
https://orcid.org/http://orcid.org/0000-0003-1304-0303
Steel screw piles are deep foundation made of a square or circular shaft with one or more screw bearing plates. This study focused on numerical modeling of pullout behavior of screw piles installed in layered soil and subjected to seismic loading. Five models of screw piles were analyzed numerically using PLAXIS 3D software. All screw piles were subjected to a static uplift load, among which two were subjected to additional seismic loading. The seismic loading represents the range of peak ground acceleration (0.25 g and 0.47 g) of earthquakes that hit Baghdad city in the last few years. The pullout failure load was assumed corresponding to a displacement of around 5% of the helix diameter obtained from numerical analysis, which gave quite similar values to those recorded experimentally. Individual plate bearing was the failure pattern for a screw pile with a spacing to diameter ratio of S/D = 3, while cylindrical shear failure was the failure pattern for a screw pile with S/D = 2. The results obtained from the numerical models revealed a significant influence for the number of helix plates on the axial displacement and failure pullout capacity of screw pile under the effect of seismic loading, while the number of screw bearing plates has very slight effect on the lateral displacement.
Numerical Modeling of Pullout Capacity of Screw Piles Under Seismic Loading in Layered Soil
Transp. Infrastruct. Geotech.
Karkush, Mahdi O. (Autor:in) / Alkaby, Ahmed D. (Autor:in)
Transportation Infrastructure Geotechnology ; 10 ; 125-146
01.02.2023
22 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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