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Structural Research Series 505PDF


Title:Response of Highway Bridges to Nonlinear Temperature Distributions
Author(s):Potgieter, I.C.; Gamble, W.L.
Subject(s):Prestressed concrete
highway bridges
Thermal analysis
Abstract:The effects of nonlinear temperature distributions resulting from solar radiation on highway bridge decks are investigated. A finite-difference heat flow-model w~s developed and used to determine the distributions of temperatures to be expected in various highway bridge structures, and the general validity of the model was established by means of comparisons between measured and predicted temperature distributions in the Kishwaukee River Bridge, a large box girder structure. Weather data from 26 stations in the United States were studied in order to determine the limiting values of probable temperature differences over the depths of girders in different geographical regions, with important differences being found between sea coast areas and desert areas. The bending moments induced in various continuous bridges were studied, with the aim of isolating the most critical cases. It was found that the positive bending moments caused by nonlinear temperature distributions were of the same general magnitude as the positive moments due to live loads in many structures. Recommendations about design are made, as are recommendations for additional study of some factors relating to the design process.
Issue Date:1983-04
Publisher:University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Civil Engineering Studies SRS-505
Genre:Technical Report
Sponsor:State of Illinois Department of Transportation
Date Available in IDEALS:2009-10-29
Identifier in Online Catalog:693526

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