INFLUENCE OF INTERFACE BEHAVIOR IN DYNAMIC SOIL-STRUCTURE INTERACTION PROBLEMS.

Persistent Link:
http://hdl.handle.net/10150/184960
Title:
INFLUENCE OF INTERFACE BEHAVIOR IN DYNAMIC SOIL-STRUCTURE INTERACTION PROBLEMS.
Author:
ZAMAN, MD. MUSHARRAF-UZ-.
Issue Date:
1982
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:
Under static of dynamic loadings, the junction (interface) between a structure-foundation system can experience contact, slip, separation and rebonding modes of deformations. Two interface models are proposed for simulation of interface behavior in finite element analysis of dynamic soil-structure interaction problems. The first element called the thin-layer element has (small) finite thickness. Geometrically, this element is similar to the continuum (soil or structural) element; however, its constitutive relations are defined differently. The normal behavior is defined as a function of the material properties and stress-strain characteristics of the neighboring continuum element. The shear behavior is defined in terms of observed shear stress-relative displacement behavior expressed as function of factors such as normal stress, number of cycles of loading and amplitude of load (or displacements). Mohr-Coulomb criterion is used to define activated sliding strength of interface. Modes of deformations are simulated by using appropriate stress redistribution iterative schemes. The second model called the mixed interface element has zero thickness. Both displacements and tractions are treated as primary unknowns. Constraints associated with modes of deformations are included using a variational approach. An incremental solution scheme is proposed. Material parameters related to the proposed models are evaluated from the results of sand-concrete interface tests in a Cyclic Multi-Degree-of-Freedom shear device. Accuracy of the proposed models are verified with respect to a number of example problems. In general, consistent and satisfactory results are obtained. For further verification and evaluation of these models, several soil-structure interaction problems are solved and detailed results are presented. It is observed that behavior of structure-foundation systems can be significantly influenced by interface conditions. An analysis based on bonded interface condition appears to underestimate actual response. Hence, it will be appropriate to include interface behavior in the analysis and design of structures subjected to dynamic and earthquake loadings.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Structural dynamics -- Mathematical models.; Soil mechanics -- Mathematical models.; Foundations -- Mathematical models.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Desai, C. S.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleINFLUENCE OF INTERFACE BEHAVIOR IN DYNAMIC SOIL-STRUCTURE INTERACTION PROBLEMS.en_US
dc.creatorZAMAN, MD. MUSHARRAF-UZ-.en_US
dc.contributor.authorZAMAN, MD. MUSHARRAF-UZ-.en_US
dc.date.issued1982en_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.abstractUnder static of dynamic loadings, the junction (interface) between a structure-foundation system can experience contact, slip, separation and rebonding modes of deformations. Two interface models are proposed for simulation of interface behavior in finite element analysis of dynamic soil-structure interaction problems. The first element called the thin-layer element has (small) finite thickness. Geometrically, this element is similar to the continuum (soil or structural) element; however, its constitutive relations are defined differently. The normal behavior is defined as a function of the material properties and stress-strain characteristics of the neighboring continuum element. The shear behavior is defined in terms of observed shear stress-relative displacement behavior expressed as function of factors such as normal stress, number of cycles of loading and amplitude of load (or displacements). Mohr-Coulomb criterion is used to define activated sliding strength of interface. Modes of deformations are simulated by using appropriate stress redistribution iterative schemes. The second model called the mixed interface element has zero thickness. Both displacements and tractions are treated as primary unknowns. Constraints associated with modes of deformations are included using a variational approach. An incremental solution scheme is proposed. Material parameters related to the proposed models are evaluated from the results of sand-concrete interface tests in a Cyclic Multi-Degree-of-Freedom shear device. Accuracy of the proposed models are verified with respect to a number of example problems. In general, consistent and satisfactory results are obtained. For further verification and evaluation of these models, several soil-structure interaction problems are solved and detailed results are presented. It is observed that behavior of structure-foundation systems can be significantly influenced by interface conditions. An analysis based on bonded interface condition appears to underestimate actual response. Hence, it will be appropriate to include interface behavior in the analysis and design of structures subjected to dynamic and earthquake loadings.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectStructural dynamics -- Mathematical models.en_US
dc.subjectSoil mechanics -- Mathematical models.en_US
dc.subjectFoundations -- Mathematical models.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.advisorDesai, C. S.en_US
dc.contributor.committeememberGallagher, R. H.en_US
dc.contributor.committeememberNowatzki, E.en_US
dc.contributor.committeememberRamaswamy, G.en_US
dc.contributor.committeememberGlass, C. E.en_US
dc.identifier.proquest8303397en_US
dc.identifier.oclc683259434en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.