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    Structural Behaviour of Concrete-filled Elliptical Column to I-beam Connections

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    PhD Thesis (14.96Mb)
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    Publication date
    2017
    Author
    Yang, Jie
    Supervisor
    Lam, Dennis
    Dai, Xianghe
    Sheehan, Therese
    Keyword
    Concrete Filled Columns
    Elliptical Hollow Section
    Moment Capacity
    Rotation Capacity
    Joint Stiffness
    Finite Element Model
    Rights
    Creative Commons License
    The University of Bradford theses are licenced under a Creative Commons Licence.
    Institution
    University of Bradford
    Department
    Faculty of Engineering and Informatics
    Awarded
    2017
    
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    Abstract
    Concrete-filled tubular (CFT) columns have been widely adopted in building structures owing to their superior structural performance, such as enhanced load bearing capacity, compared to hollow tubes. Circular, square and rectangular hollow sections are most commonly used in the past few decades. Elliptical hollow section (EHS) available recently is regarded as a new cross-section for the CFT columns due to its attractive appearance, optional orientation either on major axis or minor axis and improved structural efficiency. The state of the research in terms of elliptical columns, tubular joints between EHSs and connections with CFT columns, etc., are reviewed in this thesis, showing a lack of investigations on EHSs, especially on beam to elliptical column connections which are essential in framed structures. The structural behaviour of elliptical column to I-beam connections under bending is studied in this thesis to fill the research gap. Overall ten specimens with various joint assemblies were tested to failure to highlight the benefits of adopting concrete infill and stiffeners in the columns. A three-dimensional finite element model developed by using ABAQUS software is presented and verified against obtained experimental results, which shows acceptable accuracy and reliability in predicting failure modes of the connections and their moment capacities. Parametric studies were performed to access the main parameters that affecting the bending behaviour of the connections. A simple hand calculation method in terms of ultimate moment capacity is proposed according to experiments conducted for connections with concrete-filled columns.
    URI
    http://hdl.handle.net/10454/16022
    Type
    Thesis
    Qualification name
    PhD
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    Theses

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