Accession Number : AD0253430
Title : BEHAVIOR OF INSTRUMENTED PRESTRESSED CONCRETE PAVEMENT AT NAS LEMOORE, CALIFORNIA
Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
Personal Author(s) : BISHOP, J.A.
Report Date : 16 MAR 1961
Pagination or Media Count : 36
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)
Descriptors : *CONCRETE, *PAVEMENTS, DEFLECTION, INSTRUMENTATION, LOAD DISTRIBUTION, MEASUREMENT, PRESSURE, REINFORCED CONCRETE, RUNWAYS, STRAIN GAGES.
Distribution Statement : APPROVED FOR PUBLIC RELEASE