State of the Practice Review of Integral Abutment Bridge in Response to Seasonal Temperature Change

Expansion and contraction of Integral abutment bridges (IAB) due to temperature change force abutments to move into and away from the backfill, thus increasing earth pressures behind the abutments and inducing bending moment in piles (if used). Many researchers and engineers have conducted field monitoring of IABs to evaluate the effects of temperature change on bridges, which may have different abutment and foundation types, bridge geometries, and soil characteristics. To have a better understanding of IABs under different conditions, this paper summarizes and assesses the common practices in IABs and their behavior due to temperature change, including (a) air and bridge temperatures; (b) abutment movement; (c) pile response; and (d) earth pressure behind the abutment. In addition to temperature change, bridge skew and length have effects on the above behavior. This review found that both bending moment of piles near the bottom of abutment and axial load of piles fluctuated with temperature. Redistribution of dead loads among bridge components due to planar temperature gradients and earth pressure changes behind the abutment may contribute to axial load fluctuation in piles. Earth pressure ratcheting was observed when rotation was the primary abutment movement mode. However, some IABs did not have any earth pressure ratcheting phenomenon behind the abutment due to disturbance of backfill during bridge expansion when translation is the dominant abutment movement mode. Field monitoring showed that earth pressure coefficient decreased with depth and the existing theories often overestimated the earth pressure at the bottom of the abutment during bridge expansion.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 17p

Subject/Index Terms

Filing Info

  • Accession Number: 01763419
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02675
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 10:58AM