Published Resources Details
Journal Article
- Title
- Ultimate strength design of universal steel section struts encased in concrete and subject to biaxial bending
- In
- Civil Engineering Transactions
- Imprint
- vol. CE14, no. 1, Institution of Engineers Australia, Apr 1972, pp. 1-12
- Description
Paper No. 3026, presented at the Institution's Conference on Problems in Composite Structures, held in Adelaide in September, 1971.
The author, H. J. Brettle, BE PhD MIEAust, is an Associate Professor, School of Civil Engineering, The University of New South Wales.
[This paper was awarded the R. W. Chapman Medal 1972]
- Abstract
An ultimate strength design approach is suggested for the proportioning of steel section struts encased in concrete. The analysis involves the partitioning of a column cross-section into many elemental areas and generating data by computer for the preparation of design charts. The dimensions of all universal beam and column sections listed in the BHP-AIS handbook (Ref. 6) have been averaged and a single non-dimensionalised beam and a single column section based on the nominal flange width adopted. This simplification requires that only two sets of design graphs, one for all universal beams and the other for all available universal column sections, be used.
The published test results of columns having structural details similar to those specified in the Australian Steel Structures Code CA1-1968 (Ref. 9) are examined. Thirty axially loaded specimens indicate that the column concrete strength approximates 89% of its control cylinder strength. The results of twenty-three columns tested in uniaxial bending and four columns tested in biaxial bending show the observed column strength capacity to be 92% of the value predicted by the proposed theory.