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    Second-order elastoplastic analysis of semirigid steel frames under cyclic loading

    Access Status
    Fulltext not available
    Authors
    Vimonsatit, Vanissorn
    Tangaramvong, S.
    Tin-Loi, F.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Vimonsatit, V. and Tangaramvong, S. and Tin-Loi, F. 2012. Second-order elastoplastic analysis of semirigid steel frames under cyclic loading. Engineering Structures. 45 (2012): pp. 127-136.
    Source Title
    Engineering Structures
    DOI
    10.1016/j.engstruct.2012.06.021
    ISSN
    0141-0296
    URI
    http://hdl.handle.net/20.500.11937/5050
    Collection
    • Curtin Research Publications
    Abstract

    The evolutive second-order geometry elastoplastic analysis of flexibly connected planar structures is performed to investigate their cyclic behavior under quasistatic loading conditions. The formulation is cast as a mathematical programming problem, involving so-called ‘‘complementarity’’ constraints. A ‘‘fictitious force’’ concept, that preserves static-kinematic duality, is used to describe geometric nonlinearity. A second-order approximation, deemed sufficiently accurate for practical structures, is adopted. A semirigid connection is idealized as a zero-length elastoplastic element attached to either or both ends of a beam element. Inelasticity is captured through the familiar generalized plastic hinge concept, and a piecewise linear approximation of the nonlinear plastic capacity domain is used to represent the yield condition. A number of examples concerning realistic structures and benchmark cases is provided to check the validity and applicability of the proposed method and to study the cyclic behavior of flexibly connected planar frames.

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