Modelling the response to deep foundations under oblique loading
Paper
Paper/Presentation Title | Modelling the response to deep foundations under oblique loading |
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Presentation Type | Paper |
Authors | Johnson, K. (Author), Lemcke, Pamela M. (Author), Karunasena, W. (Author) and Sivakugan, Nagaratnam (Author) |
Editors | Zerger, Andre and Argent, Robert M. |
Journal or Proceedings Title | Proceedings of the 15th International Congress on Modelling and Simulation (MODSIM03) |
Journal Citation | 4, pp. 2048-2053 |
Number of Pages | 6 |
Year | 2003 |
Publisher | Modelling and Simulation Society of Australia and New Zealand |
Place of Publication | Canberra, Australia |
ISBN | 0975840029 |
Web Address (URL) of Paper | http://www.mssanz.org.au/MODSIM03/Volume_04/C15/01_Johnson_Modelling.pdf |
Conference/Event | 15th International Congress on Modelling and Simulation (MODSIM03) |
Event Details | 15th International Congress on Modelling and Simulation (MODSIM03) Parent International Congress on Modelling and Simulation Delivery In person Event Date 14 to end of 17 Jul 2003 Event Location Townsville, Australia |
Abstract | Deep foundations are slender pile elements used to transfer loads from structures into deeper soil strata below the ground. Deep foundations have a variety of loads including axial, lateral and moments. Often these loads will act together to form a combination of loads, such as oblique forces that have a component of axial and lateral forces. Due to the pile’s length, which can extend past 30 m, it is difficult and expensive to carry out full scale testing. Any full-scale test data is limited to the area conditions and soil properties at the testing site. Small scale testing can be used as an alternative to full scale testing, although scaling effects will influence the conclusions from this type of study greatly. Computer simulations of finite element modelling allow for in- depth studies into the complex pile-soil interaction under combination loading in deep foundation structures. This work used 3D finite element modelling to explore the effect of pile shape, sand properties, pile length and loading conditions on the capacity of a pile. Using trends discovered by these simulations design charts were developed to aid consultants when determining the bearing capacity for oblique interaction for square piles. It was found through a carefully planned sensitivity analysis that sand properties and pile shape can influence the capacity of a pile extensively. The mesh density, boundary and initial stress conditions imposed on the simulation will ultimately determine the accuracy and reliability of the model results. To gain a good understanding of a model’s capability and accuracy the simulation output must be tested and verified against case studies. The trends obtained from modelling the complex mechanisms such as the pile-soil interaction allows for greater understanding of failure mechanisms, which could otherwise not be observed |
Keywords | ABAQUS; pile foundation; pile-soil interaction |
ANZSRC Field of Research 2020 | 401001. Engineering design |
400510. Structural engineering | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | James Cook University |
https://research.usq.edu.au/item/9zz17/modelling-the-response-to-deep-foundations-under-oblique-loading
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