• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Constitutive modeling of idealized rock joints under quasi-static and cyclic loading.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_td_8814235_sip1_m.pdf
    Size:
    6.820Mb
    Format:
    PDF
    Description:
    azu_td_8814235_sip1_m.pdf
    Download
    Author
    Fishman, Kenneth Lawrence.
    Issue Date
    1988
    Advisor
    Desai, C. S.
    
    Metadata
    Show full item record
    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
    A rather novel plasticity based constitutive model to describe the response of simulated (rock) joints under cyclic, quasi-static and static shear is developed. Development of the constitutive model includes both mathematical formalization based on the hierarchical approach and laboratory testing. The mathematical formulation is such that the model is basic and general and is capable of predicting observed behavior of joints. Laboratory test results are used for the determination of parameters for the model, and for comparison with model predictions. The constitutive model is based on the theory of incremental plasticity. A generalized three-dimensional plasticity model capable of predicting the behavior of geologic solid material such as soil and rock is specialized to describe the behavior of individual rock joints. At this time, the model allows for effects of initial normal stress, states of shear and normal stress, plastic hardening, nonassociativeness, volume changes at joints, and cycles of loading, unloading and reverse loading. The test program was conducted on simulated joints. The simulated specimens were cast in concrete with a variety of surface geometries (angles of asperities). Specimens were subjected to a series of quasi-static and fast cyclic direct shear tests. Tests were performed with a special device known as the Cyclic Multi-Degree-of-Freedom (CYMDOF) shear device; minor modifications of the device were necessary for the testing of joints. Quasi-static tests included shear loading, unloading and reverse loading, and fast cyclic tests repeated cycles of shear loading at the frequency of 1.0 Hz. Tests were conducted under different levels of normal stress and amplitudes of cyclic displacement. The constants for elastic and inelastic responses were found from the laboratory test data. Then typical observed results were predicted by integrating the incremental plasticity equations which were expressed in terms of the constants. The predictions, in general, were found to provide satisfactory correlation with the observations. The results of this research have demonstrated that the model described herein is capable of capturing many aspects of rock joint behavior during quasi-static and cyclic shear loading. The model is sufficiently simplified so that it can be easily implemented in numerical techniques such as the finite element method. Such computational procedures can be used to solve practical boundary value problems in rock mechanics involving static and dynamic loads.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Civil Engineering and Engineering Mechanics
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Dissertations

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.