Modelling the load-deformation response of deep foundations under oblique loading

Johnson, K. and Lemcke, Pamela M. and Karunasena, W. and Sivakugan, Nagaratnam (2006) Modelling the load-deformation response of deep foundations under oblique loading. Environmental Modelling and Software, 21 (9). pp. 1375-1380. ISSN 1364-8152

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 moment loads. Often these loads will act together to form a combination of loads, such as previous oblique term 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 are 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 three-dimensional finite element modelling using ABAQUS 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 designers when determining the bearing capacity for previous oblique term interaction for square piles. The final design chart shows the change in capacity for in-plane loaded, square cross-sectioned piles as compared to circular piles. The difference in capacity is shown to be a function of the previous oblique term interaction angle and length to diameter ratio.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Depositing User: ePrints Administrator
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 06 Nov 2007 10:15
Last Modified: 02 Jul 2013 22:53
Uncontrolled Keywords: ABAQUS; pile foundation; pile–soil interaction; pile shape; square pile
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
01 Mathematical Sciences > 0102 Applied Mathematics > 010207 Theoretical and Applied Mechanics
Socio-Economic Objective (SEO2008): B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified
Identification Number or DOI: doi: 10.1016/j.envsoft.2005.04.015
URI: http://eprints.usq.edu.au/id/eprint/3492

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