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Main Title: Numerical evaluation of the pipe-pile buckling during vibratory driving in sand
Author(s): Bakroon, Montaser
Daryaei, Reza
Aubram, Daniel
Rackwitz, Frank
Type: Conference Object
Abstract: The buckling of steel pipe piles during vibratory driving is numerically studied using the Multi-Material Arbitrary Lagrangian-Eulerian (MMALE) method. This method handles the large soil deformations that occur during pile driving and other geotechnical installation processes. The Mohr-Coulomb and an elastic-perfectly plastic material model are used to model the soil and the pile mechanical behavior, respectively. The result of a small-scale pile driving experiment is used to validate the numerical model. The penetration trend agrees well with the experimental measurements. Thereafter, four case scenarios and their possible effects on pile buckling, namely the presence of heterogeneity in the soil (a rigid boulder inside the soil) and the existence of geometrical imperfection modes in the pile (ovality, out-of-straightness, flatness) are investigated. This study shows that a combination of local and global buckling initiates at the pile tip and the pile shaft, respectively. During the initiation of buckling, a decrease in the penetration rate of the pile is observed compared to the case where no or minimal buckling occurs. It is shown that a less portion of the driving energy is spent on the pile penetration and the rest is spent on other phenomena such as buckling, resulting in less pile penetration. The cross section of the pile tip after buckling takes a form of a “peanut”, yet with a different geometry for each case. In cases where the model was initially symmetric, an asymmetric shape in cross section of the pile tip was obtained at the final stage which can be attributed to complex soil-structure interaction. The results of the numerical approach provide promising results to be used as an evaluation tool to reach reliable predictions in pile installation practice.
Subject(s): pipe-pile buckling
pile installation
soil-structure interaction
Multi-Material Arbitrary Lagrangian-Eulerian
large deformations
Issue Date: Sep-2019
Date Available: 28-Jan-2020
Language Code: en
DDC Class: 550 Geowissenschaften
Proceedings Title: Proceedings of the 1st Mediterranean Young Geotechnical Engineers Conference
Editor: Ülgen, Deniz
Saygili, Altuğ
Kahyaoğlu, Mehmet Rifat
Durmaz, Selda
Toygar, Onur
Göçügenci, Aysu
Publisher: Turkish Society for ISSMGE; Muğla Sıtkı Koçman University; International Society for Soil Mechanics and Geotechnical Engineering
Page Start: 109
Page End: 116
TU Affiliation(s): Fak. 6 Planen Bauen Umwelt » Inst. Bauingenieurwesen » FG Grundbau und Bodenmechanik
Appears in Collections:Technische Universität Berlin » Publications

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