Evaluation of the need for longitudinal median joints in bridge decks on dual structures.

Details

• Creators:
  Phares, Brent M. ; Greimann, Lowell ; Liu, Zhengyu
• Corporate Creators:
  Iowa State University. Bridge Engineering Center
• Corporate Contributors:
  Iowa. Dept. of Transportation ; Iowa. Highway Research Board
• Subject/TRT Terms:
  • Bridge decks
  • Longitudinal cracking
  • Load tests
  • Finite element method
  • Bridge abutments
  • Evaluation
  • Longitudinal joints
• Publication/ Report Number:
  IHRB Project TR-661;InTrans Project 13-470
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Institute for Transportation
• Abstract:
  The primary objective of this project was to determine the effect of bridge width on deck cracking in bridges. Other parameters, ; such as bridge skew, girder spacing and type, abutment type, pier type, and number of bridge spans, were also studied. To ; achieve the above objectives, one bridge was selected for live-load and long-term testing. The data obtained from both field ; tests were used to calibrate a three-dimensional (3D) finite element model (FEM). Three different types of loading—live ; loading, thermal loading, and shrinkage loading—were applied. The predicted crack pattern from the FEM was compared to ; the crack pattern from bridge inspection results. A parametric study was conducted using the calibrated FEM. ; The general conclusions/recommendations are as follows: ;  Longitudinal and diagonal cracking in the deck near the abutment on an integral abutment bridge is due to the temperature ; differences between the abutment and the deck. Although not likely to induce cracking, shrinkage of the deck concrete may ; further exacerbate cracks developed from thermal effects. ;  Based upon a limited review of bridges in the Iowa DOT inventory, it appears that, regardless of bridge width, longitudinal ; and diagonal cracks are prevalent in integral abutment bridges but not in bridges with stub abutments. ;  The parametric study results show that bridge width and skew have minimal effect on the strain in the deck bridge resulting ; from restrained thermal expansion. ;  Pier type, girder type, girder spacing, and number of spans also appear to have no influence on the level of restrained ; thermal expansion strain in the deck near the abutment.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29406/dot_29406_DS1.pdf
• File Type:
  [PDF - 10.26 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:09f66fed06762cc98daae2007516f8c51d85c08461e3e76c6ba4519c189942f11da9fccb2132d280b5ae92724cb59e899f21ef85eb3664d83b5f439e45fd271e