THREE-DIMENSIONAL NONLINEAR SOIL-STRUCTURE INTERACTION ANALYSIS OF PILE GROUPS AND ANCHORS.

Persistent Link:
http://hdl.handle.net/10150/187818
Title:
THREE-DIMENSIONAL NONLINEAR SOIL-STRUCTURE INTERACTION ANALYSIS OF PILE GROUPS AND ANCHORS.
Author:
MUQTADIR, ABDUL.
Issue Date:
1984
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Analysis and design of structures supported by geological media pose various complexities such as nonlinear behavior of supporting media, nature of loading, irregularities in geometry and boundary condition, and the interaction effects. It is extremely difficult to find closed-form solutions for such problems. So often, numerical techniques such as finite difference, finite element and boundary integral methods are used. In this research two soil-structure interaction problems are analyzed using the finite element method involving fully three-dimensional idealizations. In order to incorporate nonlinear behavior of a soil, a nonlinear elastic (hyperbolic model), and generalized single surface plasticity model including hardening are implemented in the finite element program for analysis of a pile group foundation, and an anchor in sands, respectively. The parameters required to define these models are determined from comprehensive laboratory stress-strain data obtained by using a multiaxial testing device. Typical stress paths are back predicted using the generalized plasticity model to verify that it is capable of predicting those paths, and is found to be satisfactory. In order to include the interaction effects resulting in relative slip and debonding or crack and openings at the junction between two dissimilar materials, the thin-layer element model is implemented. Load deformation behavior, force and stress distributions in various components of pile group foundation, and the anchor-soil system are predicted by using the numerical procedure. The predictions are compared with results from a model test for the pile group and field observations for the anchor problem; the comparisons are found to be satisfactory. The effects of soil nonlinearity and interface behavior are also delineated and it is found that their inclusion, particularly in case of anchors analysis, can substantially effect the behavior of the system. Detailed analysis of the results permits an increased understanding of the stress deformation mechanisms of the three-dimensional problems.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Soil mechanics.; Soils -- Plastic properties.; Structural engineering.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleTHREE-DIMENSIONAL NONLINEAR SOIL-STRUCTURE INTERACTION ANALYSIS OF PILE GROUPS AND ANCHORS.en_US
dc.creatorMUQTADIR, ABDUL.en_US
dc.contributor.authorMUQTADIR, ABDUL.en_US
dc.date.issued1984en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractAnalysis and design of structures supported by geological media pose various complexities such as nonlinear behavior of supporting media, nature of loading, irregularities in geometry and boundary condition, and the interaction effects. It is extremely difficult to find closed-form solutions for such problems. So often, numerical techniques such as finite difference, finite element and boundary integral methods are used. In this research two soil-structure interaction problems are analyzed using the finite element method involving fully three-dimensional idealizations. In order to incorporate nonlinear behavior of a soil, a nonlinear elastic (hyperbolic model), and generalized single surface plasticity model including hardening are implemented in the finite element program for analysis of a pile group foundation, and an anchor in sands, respectively. The parameters required to define these models are determined from comprehensive laboratory stress-strain data obtained by using a multiaxial testing device. Typical stress paths are back predicted using the generalized plasticity model to verify that it is capable of predicting those paths, and is found to be satisfactory. In order to include the interaction effects resulting in relative slip and debonding or crack and openings at the junction between two dissimilar materials, the thin-layer element model is implemented. Load deformation behavior, force and stress distributions in various components of pile group foundation, and the anchor-soil system are predicted by using the numerical procedure. The predictions are compared with results from a model test for the pile group and field observations for the anchor problem; the comparisons are found to be satisfactory. The effects of soil nonlinearity and interface behavior are also delineated and it is found that their inclusion, particularly in case of anchors analysis, can substantially effect the behavior of the system. Detailed analysis of the results permits an increased understanding of the stress deformation mechanisms of the three-dimensional problems.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectSoil mechanics.en_US
dc.subjectSoils -- Plastic properties.en_US
dc.subjectStructural engineering.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineEngineering and Engineering Mechanicsen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.committeememberDaDeppo, D. A.en_US
dc.contributor.committeememberNowatzki, E. A.en_US
dc.contributor.committeememberRichard, R. M.en_US
dc.identifier.proquest8501918en_US
dc.identifier.oclc693362483en_US
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