Evaluating seismic demands for segmental columns with low energy dissipation capacity

Ehsan Nikbakht, Khalim Rashid, Iman Mohseni, Farzad Hejazi

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Post-tensioned precast segmental bridge columns have shown high level of strength and ductility, and low residual displacement, which makes them suffer minor damage after earthquake loading; however, there is still lack of confidence on their lateral response against severe seismic loading due in part to their low energy dissipation capacity. This study investigates the influence of major design factors such as post-tensioning force level, strands position, columns aspect ratio, steel jacket and mild steel ratio on seismic performance of self-centring segmental bridge columns in terms of lateral strength, residual displacement and lateral peak displacement. Seismic analyses show that increasing the continuous mild steel ratio improves the lateral peak displacement of the self-centring columns at different levels of post-tensioning (PT) forces. Such an increase in steel ratio reduces the residual drift in segmental columns with higher aspect ratio more considerably. Suggestions are proposed for the design of self-centring segmental columns with various aspect ratios at different target drifts.

    Original languageEnglish
    Pages (from-to)1277-1297
    Number of pages21
    JournalEarthquake and Structures
    Volume8
    Issue number6
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    Aspect ratio
    Energy dissipation
    Carbon steel
    Steel
    Ductility
    Earthquakes

    Keywords

    • Earthquake loading
    • Finite element method (FEM)
    • Lateral seismic demand
    • Post-tensioning
    • Precast segmental columns
    • Residual displacement

    ASJC Scopus subject areas

    • Civil and Structural Engineering

    Cite this

    Evaluating seismic demands for segmental columns with low energy dissipation capacity. / Nikbakht, Ehsan; Rashid, Khalim; Mohseni, Iman; Hejazi, Farzad.

    In: Earthquake and Structures, Vol. 8, No. 6, 2015, p. 1277-1297.

    Research output: Contribution to journalArticle

    Nikbakht, Ehsan ; Rashid, Khalim ; Mohseni, Iman ; Hejazi, Farzad. / Evaluating seismic demands for segmental columns with low energy dissipation capacity. In: Earthquake and Structures. 2015 ; Vol. 8, No. 6. pp. 1277-1297.
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