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 Abutments Bridge Decks Evaluation Finite Element Method Load Tests Longitudinal Cracking 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:09f66fed06762cc98daae2007516f8c51d85c08461e3e76c6ba4519c189942f11da9fccb2132d280b5ae92724cb59e899f21ef85eb3664d83b5f439e45fd271e
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29406/dot_29406_DS1.pdf
• File Type:
  [PDF - 10.26 MB ]