Journals >> Abstract VOLUME 9. No. 1 ( June 1996)
Moment Redistribution by Eccentric Hinges: (E. J. Forrest)
A brief outline of the efficiency gain in the use of eccentric hinges to redistribute moments in steel frame buildings, with a suggested mathematical expression of structural efficiency. The eccentricities can redistribute moments in both fixed and pin jointed frames. The use of eccentricities to achieve other desirable results in complex structures and to control deflections. The effects of redistributing and balancing of moments in the elastic range to eliminate post elastic strain and "shake down" failure in repeated load situations.
Using Micropoz(TM) Concrete for Corrosion Protection: (F. Papworth, R.T. Harper, T.J. Browne)
This paper reviews data on chloride diffusion, chloride permeability, electrical resistivity, water permeability and sorptivity, and relates it to reinforcement corrosion mechanisms in marine and buried structures. The data is drawn from test programs in New Zealand, Australia, Singapore, Malaysia, Indonesia, and Hong Kong. Results from G.P. silica fume, slag. fly ash, and triple blended systems are reviewed. Principle variables included water cement ratios and degree of cement replacement. The relative merits of different test methods for assessment of concrete performance are outlined.
Plywood Portal Frame Buildings for Light Commercial and Rural use: (P. N. Richardson, H. Bier)
This paper describes a recently released series of portal frame solutions for small buildings with easy erection and simple construction. They are based around 2.4 m. and 2.7 m. plywood sheet multiples. Thje standard solutions (designed to comply with current standards) offer a detail and general layout sheet, together with a portal frame sheet for 8, 10, 12, 14, and 15 metre nominal spans in bays to suit any length. The spans can be combined to provide shapes and sizes to meet users needs. Different exterior claddings such as steel or plywood may be used.
MATERIALS CORNER
Structural Timber: The Juvenile Wood Problem: (Bryan Walford)
Excessive deflections due to juvenile wood from young age forests of radiata pine. Growth patterns of trees. Comparison between outerwood and juvenile wood.
Light Timber Frame, Recent Developments: (Guy Cavanagh)
Engineered dry framing for light timber construction. The advantages of machine stress grading and kiln drying and sizing after stable moisture content has been arrived at. Shrinkage / moisture content change.
