BEHAVIOR OF INSTRUMENTED PRESTRESSED CONCRETE PAVEMENT AT NAS LEMOORE, CALIFORNIA
Abstract
Longitudinal and transverse post-tensioning loads and the distribution of these forces along the lengths of tendons were defined by calibrated links or couplers installed in the tendons. Strains induced in the concrete by stressing and existing for several months after stressing were measured by Carlson strain meters embedded in the concrete adjacent to instrumented couplers. A load test resulted in the definition of a deflection pattern and the measurement of pressures under the load. There was apparently a substantial amount of friction between longitudinal tendons and their ducts as indicated by the difference in tendon force between ends and center. Couplers installed in transverse tendons which were encased in rigid ducts and stressed from one end only did not indicate a large friction loss from one end of the tendons to the other. Tendon forces decrease, and compressive strains in the concrete increase, with time under the influence of slab shrinkage and increased pavement temperatures. A load test shows that the six-inch thickness of prestressed concrete pavement is the equivalent of at least eleven inches of conventional concrete pavement. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 1961
- Accession Number
- AD0253430
Entities
People
- J.a. Bishop
Organizations
- Naval Facilities Engineering Service Center