Research on structures
Over the period 1972 to 1976 the NAASRA bridge design specification has been revised extensively by separate committees of engineers from the state road authorities. It was decided the information available was either inadequate or based entirely on data from overseas tests not applying necessarily to Australian conditions. It was found available information indicated the design losses in prestressed concrete should be substantially increased. This, in conjunction with the increased live loads, has caused a significant increase in the amount of prestress required. Although there is little evidence structures designed to the previous lower losses are not performing satisfactorily, there was a need to research and provide data based on Australian conditions. The Australian Road Research Board has sponsored and coordinated research into a number of areas throughout Australia. The Queensland research is being carried out by Main Roads Department engineers with the ARRB and the Civil Engineering Department of the University of Queensland. The following research projects are in progress: creep and shrinkage of high strength concrete; temperature effects in concrete bridges; relaxation losses of prestressing strand; live load spectra on bridges; and modulus of elasticity of high strength concrete.
- Record URL:
- Publication Date: 1979-12
Language
- English
Media Info
- Pagination: 49-55
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Serial:
- QUEENSLAND ROADS
- Volume: 18
- Issue Number: 36
Subject/Index Terms
- TRT Terms: Bearing capacity; Cables; Compression; Concrete; Creep; Deflection; High strength; Measurement; Measuring instruments; Mechanical relaxation; Modulus of deformation; Shrinkage; Temperature; Test procedures; Tests
- ATRI Terms: Bridge loads; Cable; Compression; Concrete; Creep; Deflection; High strength; Measurement; Measuring equipment; Modulus; Relaxation; Shrinkage; Temperature; Test; Test method
- Subject Areas: Materials;
Filing Info
- Accession Number: 01438689
- Record Type: Publication
- Source Agency: ARRB
- Files: ATRI
- Created Date: Aug 24 2012 9:48PM