Finite element models and cyclic behavior of self-centering steel post-tensioned connections with web hourglass pins

George Vasdravellis, Theodore Karavasilis, Brian Uy

    Research output: Contribution to journalArticle

    61 Citations (Scopus)

    Abstract

    A new self-centering steel post-tensioned connection has been proposed by the authors. The connection
    uses high-strength steel post-tensioned bars to provide self-centering behavior and steel energy dissipation
    elements that consist of cylindrical pins with hourglass shape to provide enhanced deformation
    capacity. Large-scale experimental tests showed that the connection has robust self-centering behavior
    by eliminating residual drifts and beam damage for drifts lower or equal to 6%. This paper presents finite
    element models which can be used to reliably assess the design and behavior of the connection. A simplified
    connection model was first developed using simple mechanics. This model can predict the connection
    stiffness and strength with reasonable accuracy, and enables the preliminary design of self-centering
    steel moment-resisting frames using the proposed connection. A detailed nonlinear finite element model
    was also developed. This model was calibrated against experimental results and found capable to trace
    the nonlinear cyclic behavior of the connection and capture all possible local failure modes. The calibrated
    finite element model was used to conduct a series of simulations to study the effect of different
    parameters on the connection behavior. The parameters studied include the adopted design procedure,
    beam reinforcing detailing, and the beam and column section sizes
    Original languageEnglish
    Pages (from-to)1-16
    Number of pages16
    JournalEngineering Structures
    Volume52
    DOIs
    Publication statusPublished - 2013

    Keywords

    • Self-centering
    • Finite element
    • Seismic behavior
    • Steel frames

    ASJC Scopus subject areas

    • Civil and Structural Engineering

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