FIELD MEASUREMENT OF PRESTRESS LOSSES IN EXTERNAL TENDONS

The authors present the results of a field study of losses in external post-tensioning tendons. Investigators developed an innovative system to measure strains in external tendon bundles. The system was installed on 16 tendons in an urban viaduct of segmental post-tensioned box girders. Measurements were taken to examine initial prestress losses, such as losses through stressing hardware, friction losses, seating losses, and elastic shortening losses. Measurements were recorded for over a year to study time-dependent losses. Recommendations are presented for modifications to the current methods for computing prestress losses in external tendons presented in the "American Association of State Highway and Transportation Officials (AASHTO) Guide Specification for the Design and Construction of Segmental Concrete Bridges."

Language

  • English

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Filing Info

  • Accession Number: 00727004
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 29 1996 12:00AM