The objective of this research is to develop an efficient proof load testing procedure for existing bridges. Many deteriorated structures are found unacceptable by traditional analysis. However, by engineering judgment, some of them seem to have adequate strength to carry normal highway traffic. Proof load testing can reveal the hidden safety reserve. Three bridges in Michigan were selected for proof load tests. LVDT's were used to measure deflection. Strain transducers were also installed to determine the stress level in critical locations. For selected bridges, tanks were positioned within a lane. They were gradually moved towards the center of the span to increase the load effect (mid-span moment). After each move, measurements were taken. For all bridges, stress levels were unexpectedly low.


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 383-403

Subject/Index Terms

Filing Info

  • Accession Number: 00725733
  • Record Type: Publication
  • ISBN: 8487867790
  • Files: TRIS
  • Created Date: Sep 10 1996 12:00AM