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Response of Axially Loaded Piles in Sands with and without Seismically Induced Porewater Pressures
The paper presents a procedure to predict the mobilized shaft resistance of axially loaded piles in medium dense sands with/without liquefaction (limited liquefaction). The technique is developed to assess the load transfer-settlement (t-z) curve, and varying pile-side resistance and pile-head axial load versus the pile settlement in sands. The mobilized pile-side and tip resistances are determined based on stress-strain relationships of sands under drained and undrained conditions. The proposed approach allows the assessment of the t—z curve along the pile length under undrained conditions with the consideration of the porewater pressure (PWP) developing in surrounding sands. The presented model accounts for the variation of the PWP in the near-field soil under axial load which is combined with the influence of the free-field PWP generated by cyclic loading (post-seismic event). The study also employs an undrained constitutive model for sands with limited liquefaction to calculate the variation of shear stresses and strains in the surrounding soil along the length of the pile. A computer code is developed to implement the presented technique.
Response of Axially Loaded Piles in Sands with and without Seismically Induced Porewater Pressures
The paper presents a procedure to predict the mobilized shaft resistance of axially loaded piles in medium dense sands with/without liquefaction (limited liquefaction). The technique is developed to assess the load transfer-settlement (t-z) curve, and varying pile-side resistance and pile-head axial load versus the pile settlement in sands. The mobilized pile-side and tip resistances are determined based on stress-strain relationships of sands under drained and undrained conditions. The proposed approach allows the assessment of the t—z curve along the pile length under undrained conditions with the consideration of the porewater pressure (PWP) developing in surrounding sands. The presented model accounts for the variation of the PWP in the near-field soil under axial load which is combined with the influence of the free-field PWP generated by cyclic loading (post-seismic event). The study also employs an undrained constitutive model for sands with limited liquefaction to calculate the variation of shear stresses and strains in the surrounding soil along the length of the pile. A computer code is developed to implement the presented technique.
Response of Axially Loaded Piles in Sands with and without Seismically Induced Porewater Pressures
Ashour, Mohamed (author) / Helal, Amr (author)
2012-12-01
Article (Journal)
Electronic Resource
English
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