Assessing the damage potential in pretensioned bridges caused by increased truck loads due to freight movements (phase II).

Details

• Creators:
  Peterman, Robert J. ; Hammerschmidt, Steven F.
• Corporate Creators:
  Mid America Transportation Center
• Subject/TRT Terms:
  • Concrete bridges
  • Prestressed concrete
  • Bridge members
  • Strain (Mechanics)
  • Strain gages
  • Nondestructive tests
  • Structural analysis
• Publication/ Report Number:
  25-1121-0001-252
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance
• Abstract:
  With aging and deterioration of bridges, evaluation of existing conditions of their structural elements becomes vital to ; engineers and public officials when deciding how to repair or replace the structures. The ability to obtain necessary ; information on these conditions is often expensive and time consuming, especially for concrete bridges where the ; reinforcement is not available for inspection. Employing the surface-strain relief method could allow for accurate ; evaluation of aged or damaged prestressed members. ; The surface-strain relief method was developed to measure initial or pre-existing strains in a concrete member. It involves ; relieving the strain in the member and measuring the change in strain. Two methods were tested in this study—one used a ; linear electrical-resistance strain gage and a three-inch-diameter diamond concrete core bit to cut around the gage, and the ; second method used a laser-speckle imaging device and a diamond cutting wheel to create notches perpendicular to the axis ; of maximum strain. Both methods measured the change in strain and related it to within 10% of the actual fse. The ; method of cutting notches and the laser-speckle imaging device provided a simpler method to be implemented in the field, ; while the coring method achieved a higher level of accuracy and precision.
  More +
• Format:
  PDF
• Funding:
  MATC TRB RiP No. 18460
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23121/dot_23121_DS1.pdf
• File Type:
  [PDF - 3.36 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d957a42d1ff2b45caa7e3c79e8f5686f5c392108712cf9ee6f384f4b78d55fc37f6894568bd08e0133b1cfeaa6a855f518d6d26d578d153fbc44eaf4f17be673