Long-Term Movements of Concrete Bridges


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Title: Long-Term Movements of Concrete Bridges

Author(s): K. N. Shiu, H. G. Russel and W. G. Corley

Publication: Special Publication

Volume: 94


Appears on pages(s): 319-342

Keywords: bridge bearings; bridges (structures); control joints; creep properties; joints (junctions); measurement; segmental construction; shrinkage; strains; temperature; thermal expansion; Construction

Date: 9/1/1986

Long-term thermal and time-dependent movements of segmental box-girder bridges are discussed. Results from onsite measurements of the Kishwaukee River Bridge are presented. Temperature measurements over a period of five years provided seasonal thermal behavior of the bridge. Comparisons were made between calculated effective bridge temperatures and average monthly temperatures at the bridge site. Based on the seasonal variations of effective bridge temperature, average seasonal longitudinal thermal movements for the Kishwaukee River Bridge were calculated. Field measurements were also used to confirm an analytical model that predicts time-dependent behavior of segmental box girders. Actual material properties and construction schedules were used in the calculations. Time-dependent longitudinal movements of the Kishwaukee River Bridge were calculated. The significance of time-dependent movements is discussed. In addition, the effects of different time-dependent material properties on the prediction of long-term horizontal bridge movements are presented.