Replaceable Grouted External Post-Tensioned Tendons

Details

• Creators:
  Ledesma, T.
• Corporate Creators:
  WSP
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Box Girder Bridges Bridge Design Equipment Replacement Tendons (Materials) Tensioning
• Publication/ Report Number:
  FHWA-HIF-19-067
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Federal Highway Administration (U.S.)
• Abstract:
  Corrosion of prestressing strands has required replacement of external post-tensioning tendons in several existing post-tensioned bridges. External tendons are commonly used in concrete box girder bridges constructed using the span-by-span or balanced cantilever methods. Currently in the US, external tendons are discretely bonded at anchorages and deviator locations. Replacement of these types of tendons is a complex and time-consuming operation with safety concerns for personnel. Under task order 5009, WSP conducted a state-of-the-art review, then developed and presented guidance for fully replaceable grouted external tendons. Specific details included post-tensioning system components, structural design and detailing aspects, and tendon installation and replacement procedures.
• Format:
  PDF
• Funding:
  DTFH61-14-D-00048
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:b69c4180221b06ca62dee2b5f19f3f3dfac235b639119fcc42d00fe9af3fb5e2ef3a23adbec716a51da9b87aa78aba41ba55100e4f5959919d3bd61009c1966f
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/51760/dot_51760_DS1.pdf
• File Type:
  [PDF - 5.64 MB ]