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Title:Integral Abutment Bridges Under Thermal Loading: Numerical Simulations and Parametric Study
Author(s):LaFave, James M.; Fahnestock, Larry A.; Wright, Beth A.; Riddle, Joseph K.; Jarrett, Matthew W.; Svatora, Jeffrey S.; An, Huayu; Brambila, Gabriela
Subject(s):Integral Abutment Bridges
Skewed Bridges
Thermal Loading
Steel I-Girders
Steel H-Piles
Pile Strain
Girder Stress
Superstructure-Substructure Interaction
Effective Expansion Length
Numerical Models
Geographic Coverage:Illinois
Abstract:Integral abutment bridges (IABs) have become of interest due to their decreased construction and maintenance costs in comparison to conventional jointed bridges. Most prior IAB research was related to substructure behavior, and, as a result, most limit states that have been considered in design guidelines have been based on substructure considerations. However, integral abutment construction also affects superstructure behavior and demands, and superstructure properties directly influence substructure behavior. This report presents numerical simulations evaluating the behavior of IABs with composite steel I-girders subjected to temperature changes consistent with seasonal fluctuations in the state of Illinois. Nonlinear bridge models are introduced in which key parameters are varied, such as span length, pile size, and skew. Other parameters that were deemed of less importance, like various pile and soil conditions, are studied as well. Three-dimensional finite element model results indicate that longitudinal bridge movement is directly dependent on IAB effective expansion length (EEL), regardless of other bridge design parameters. Structural responses such as girder superstructure elastic stress and pile substructure inelastic strain are influenced by EEL, pile type and size, superstructure rotational stiffness, and bridge skew. Results presented herein suggest that superstructure geometry—including bridge skew—should be considered in IAB substructure design and that thermally induced stresses and strains should be considered in superstructure and substructure design.
Issue Date:2016-06
Publisher:Illinois Center for Transportation/Illinois Department of Transportation
Citation Info:LaFave, James M., Larry A. Fahnestock, Beth A. Wright, Joseph K. Riddle, Matthew W. Jarrett, Jeffrey S. Svatora, Huayu An, and Gabriela Brambila. 2016. Integral Abutment Bridges Under Thermal Loading: Numerical Simulations and Parametric Study. A report of the findings of ICT-R27-115. Illinois Center for Transportation Series No. 16-015. Research Report No. FHWA-ICT-16-014. Illinois Center for Transportation, Rantoul, IL.
Series/Report:Illinois Center for Transportation Series No. 16-015; Research Report No. FHWA-ICT-16-014.
Genre:Technical Report
Sponsor:Illinois Department of Transportation, R27-115
Rights Information:No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161
Date Available in IDEALS:2016-08-10

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