Post-earthquake bridge repair cost and repair time estimation methodology

    Authors

    K. R. Mackie; J. M. Wong;B. Stojadinovic

    Comments

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    Abbreviated Journal Title

    Earthq. Eng. Struct. Dyn.

    Keywords

    damage; loss modeling; performance-based earthquake engineering; repair; quantity; FRAGILITY CURVES; FRAME STRUCTURES; RISK-ASSESSMENT; GROUND MOTIONS; PERFORMANCE; EARTHQUAKE; FUNCTIONALITY; SUM; Engineering, Civil; Engineering, Geological

    Abstract

    While structural engineers have traditionally focused on individual components (bridges, for example) of transportation networks for design, retrofit, and analysis, it has become increasingly apparent that the economic costs to society after extreme earthquake events are caused at least as much from indirect costs as direct costs due to individual structures. This paper describes an improved methodology for developing probabilistic estimates of repair costs and repair times that can be used for evaluating the performance of new bridge design options and existing bridges in preparation for the next major earthquake. The proposed approach in this paper is an improvement on previous bridge loss modeling studies-it is based on the local linearization of the dependence between repair quantities and damage states so that the resulting model follows a linear relationship between damage states and repair points. The methodology uses the concept of performance groups (PGs) that account for damage and repair of individual bridge components and subassemblies. The method is validated using two simple examples that compare the proposed method to simulation and previous methods based on loss models using a power-law relationship between repair quantities and damage. In addition, an illustration of the method is provided for a complete study on the performance of a common five-span overpass bridge structure in California. Intensity-dependent repair cost ratios (RCRs) and repair times are calculated using the proposed approach, as well as plots that show the disaggregation of repair cost by repair quantity and by PG. This provides the decision maker with a higher fidelity of data when evaluating the contribution of different bridge components to the performance of the bridge system, where performance is evaluated in terms of repair costs and repair times rather than traditional engineering quantities such as displacements and stresses. Copyright (C) 2009 John Wiley & Sons. Ltd.

    Journal Title

    Earthquake Engineering & Structural Dynamics

    Volume

    39

    Issue/Number

    3

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    281

    Last Page

    301

    WOS Identifier

    WOS:000275002200003

    ISSN

    0098-8847

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