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Analysis of Laterally Loaded Piles in Liquefiable Soils with a Frozen Crust
Liquefaction has been a common occurrence in past major earthquakes across the world, and has caused extensive damage to the built infrastructures. A substantial portion of these ground failures and structural damages are a direct result of or related to lateral spreading. Lateral spreading is particularly damaging if a non-liquefiable crust rides on top of the liquefied soil. When the ground crust is frozen, its physical properties, including stiffness, shear strength, and permeability, will be changed substantially. This paper reports preliminary results obtained from analyzing the seismic interaction between soil and pile foundation through the use of three-dimensional Finite Element (FE) modeling and the simplified static Beam on Nonlinear Winkler Foundation (BNWF) approach. It is found that the maximum shear and bending moment increase greatly when the ground crust freezes. The pile responses predicted by the BNWF approach agree well with those from the 3D FE modeling. It is concluded that the BNWF approach can be used to predict pile performance in the seismic design of deep foundations embedded in liquefiable soils in the cold regions.
Analysis of Laterally Loaded Piles in Liquefiable Soils with a Frozen Crust
Liquefaction has been a common occurrence in past major earthquakes across the world, and has caused extensive damage to the built infrastructures. A substantial portion of these ground failures and structural damages are a direct result of or related to lateral spreading. Lateral spreading is particularly damaging if a non-liquefiable crust rides on top of the liquefied soil. When the ground crust is frozen, its physical properties, including stiffness, shear strength, and permeability, will be changed substantially. This paper reports preliminary results obtained from analyzing the seismic interaction between soil and pile foundation through the use of three-dimensional Finite Element (FE) modeling and the simplified static Beam on Nonlinear Winkler Foundation (BNWF) approach. It is found that the maximum shear and bending moment increase greatly when the ground crust freezes. The pile responses predicted by the BNWF approach agree well with those from the 3D FE modeling. It is concluded that the BNWF approach can be used to predict pile performance in the seismic design of deep foundations embedded in liquefiable soils in the cold regions.
Analysis of Laterally Loaded Piles in Liquefiable Soils with a Frozen Crust
Li, Qiang (author) / Zhang, Xiaoyu (author) / Yang, Zhaohui (author)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 205-214
2012-03-29
Conference paper
Electronic Resource
English
Analysis of Laterally Loaded Piles in Liquefiable Soils with a Frozen Crust
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