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Title:Integral Abutment Bridges under Thermal Loading: Field Monitoring and Analysis
Author(s):LaFave, James M.; Fahnestock, Larry A.; Brambila, Gabriela; Riddle, Joseph K.; Jarrett, Matthew W.; Svatora, Jeffrey S.; Wright, Beth A.; An, Huayu
Subject(s):Integral Abutment Bridge
Field Monitoring
Skewed Bridges
Thermal Loading
Pile Strain
Girder Stress
Global Movement
Girder Fixity
Abstract:Integral abutment bridges (IABs) have gained popularity throughout the United States due to their low construction and maintenance costs. Previous research on IABs has been heavily focused on substructure performance, leaving a need for better understanding of IAB superstructure behavior and interdependent effects. This report presents findings of a field monitoring program for two Illinois IABs (which supplements findings from a parametric study portion of the overall project that are summarized in a previous volume). The field monitoring program included collecting data about (i) global bridge movements; (ii) pile, deck, girder, and approach-slab strains; and (iii) rotations at different abutment interfaces. Field results have been compared to finite-element models of each bridge in order to provide further insight into IAB behavior. Field monitoring results corroborated that IAB longitudinal expansion and contraction is somewhat less than theoretical free expansion and contraction, and is influenced by bridge skew as well. Significant girder stresses were observed, particularly at the girder bottom flange, which should be considered in design. Pile strain values indicate there is likely some reserve pile-deformation capacity typically available.
Issue Date:2017-08
Publisher:Illinois Center for Transportation/Illinois Department of Transportation
Citation Info:LaFave, James M., Larry A. Fahnestock, Gabriela Brambila, Joseph K. Riddle, Matthew W. Jarrett, Jeffrey S. Svatora, Beth A. Wright, and Huayu An. 2017. Integral Abutment Bridges under Thermal Loading: Field Monitoring and Analysis. A report of the findings of ICT-R27-115. Illinois Center for Transportation Series No. 17-022. Research Report No. FHWA-ICT-17-017. Illnois Center for Transportation, Rantoul, IL
Genre:Technical Report
Rights Information:No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161.
Date Available in IDEALS:2017-08-31

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