LRFD flexural provisions for prestressed concrete bridge girders strengthened with carbon fiber-reinforced polymer laminates

    Authors

    S. El-Tawil;A. M. Okeil

    Abbreviated Journal Title

    ACI Struct. J.

    Keywords

    polymer; prestressed concrete; rehabilitation; COMPOSITE-MATERIALS; SYSTEM RELIABILITY; HIGHWAY BRIDGES; RC BEAMS; RESISTANCE; LOAD; Construction & Building Technology; Engineering, Civil; Materials; Science, Multidisciplinary

    Abstract

    The behavior and design of prestressed concrete (PSC) bridge girders flexurally strengthened with carbon fiber-reinforced polymer (CFRP) laminates are discussed. A fiber section model that accounts for inelastic material behavior as well as the construction sequence including transfer composite action between the cast-in-place deck and girder, and bonding of CFRP laminates, is developed. The model is verified and is then used to conduct thousands of Monte Carlo simulations of a number of bridges designed according to the 1998 AASHTO LRFD. The bridge designs address a broad range of design parameters including span length, ratio of dead load to live load, and amount of CFRP strengthening. The numerical simulations are used to develop cross-sectional resistance models from which the flexural reliability of the designed bridges is calculated using the first-order reliability method. An equation for the flexural strength reduction factor for PSC bridge girders strengthened with CFRP laminates is proposed.

    Journal Title

    Aci Structural Journal

    Volume

    99

    Issue/Number

    2

    Publication Date

    1-1-2002

    Document Type

    Article

    Language

    English

    First Page

    181

    Last Page

    190

    WOS Identifier

    WOS:000173943100008

    ISSN

    0889-3241

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