R-Factor parameterized bridge damage fragility curves

    Authors

    K. R. Mackie;B. Stojadinovic

    Comments

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    Abbreviated Journal Title

    J. Bridge Eng.

    Keywords

    damage; bridges; highway; parameters; curvature; Engineering, Civil

    Abstract

    Damage fragilities describe the probability that a bridge will incur certain (discrete) damage states conditioned on the intensity of the earthquake it may experience. Reinforced concrete box girder highway overpass bridges are prevalent among the total inventory of bridges in California. For this class of bridges, a method for computing damage fragilities for three damage states (concrete cover spalling, longitudinal bar buckling, and column failure) based on the bridge force reduction factors (R-factors) is derived in this paper. Bridge damage fragilities are described by equations relating the median intensity and uncertainty of ground motion to discrete damage states of column concrete cover spatting, column bar buckling, and column failure using the bridge R-factor as the principal parameter describing the bridge structure. Such damage fragility equations are furnished for earthquake intensities measured using pseudospectral acceleration (Sa) and cumulative absolute displacement (CAD) in both the bridge longitudinal and transverse directions.

    Journal Title

    Journal of Bridge Engineering

    Volume

    12

    Issue/Number

    4

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    500

    Last Page

    510

    WOS Identifier

    WOS:000247354800012

    ISSN

    1084-0702

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