• Admin
    UC Research Repository
    View Item 
       
    • UC Home
    • Library
    • UC Research Repository
    • College of Engineering
    • Engineering: Theses and Dissertations
    • View Item
       
    • UC Home
    • Library
    • UC Research Repository
    • College of Engineering
    • Engineering: Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of the RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    Statistics

    View Usage Statistics

    Seismic shear strength of circular bridge piers.

    Thumbnail
    View/Open
    Ang_thesis.pdf (18.02Mb)
    Author
    Ang, Beng Ghee
    Date
    1985
    Permanent Link
    http://hdl.handle.net/10092/11988
    Degree Grantor
    University of Canterbury
    Degree Level
    Doctoral
    Degree Name
    Doctor of Philosophy

    The project was carried out with the intention to study the shear strength of circular reinforced concrete bridge piers under seismic loading. Two series of tests were conducted. Initially, twenty-five column units were tested by subjecting them to static incremental reversed cyclic loading, to investigate the influence of some main parameters. The columns were loaded into the inelastic range to control­ led displacement ductility levels. The second stage of experimental work involved dynamic testing of bridge piers, which were half scale models of the static test units on a shake-table. Altogether eight single pier models and two twin-pier models were tested. The single pier models were subjected to sinusoidal excitation while the twin-pier models were tested using scaled earthquake accelerograms.

    The performance of the test units was gauged mainly in terms of shear strength and displacement ductility capacity. Four failure modes were identified according to the displacement ductility level at which significant degradation occurred. The static test results indicated that existing code provisions for shear strength were conservative and suggested that the level of shear strength and the displacement ductility might be related.

    The behaviour of single pier models in the dynamic tests was compatible with that of the static test units. The behaviour of the twin-pier models was less predictable, especially when axial tension was acting. The dynamic magnification effect on material strength due to higher strain rate was not significant in the tests.

    A design method was proposed as an outcome of the static tests. The proposal allows the shear strength and the displacement ductility capacity to be determined, and has been incorporated into an integral flexure/shear design approach in which the provision of transverse reinforcement is considered for confinement as well as shear resistance.

    Some theoretical study was also conducted using 'Diagonal Compression Field Theory'. The theory was adapted using a stress­ strain relationship developed for confined concrete. The agreement between the predicted and the experimental behaviour in terms of load­ displacement response was reasonable.

    Collections
    • Engineering: Theses and Dissertations [2264]
    Rights
    https://canterbury.libguides.com/rights/theses

    UC Research Repository
    University Library
    University of Canterbury
    Private Bag 4800
    Christchurch 8140

    Phone
    364 2987 ext 8718

    Email
    ucresearchrepository@canterbury.ac.nz

    Follow us
    FacebookTwitterYoutube

    © University of Canterbury Library
    Send Feedback | Contact Us