Published Resources Details
Journal Article
- Title
- Design requirements for column braces
- In
- Civil Engineering Transactions
- Imprint
- vol. CE17, no. 1, Institution of Engineers Australia, Apr 1975, pp. 30-36
- Description
Paper No.3390 submitted by the authors, on August 22, 1974.
The authors, B. R. Mutton, BE StudIEAust, and N. S. Trahair, BSc BE MEngSc PhD MIEAust, are respectively Research Student and Associate Professor, School of Civil Engineering, University of Sydney.[This paper was awarded the 1975 W. H. Warren Memorial Prize]
- Abstract
The elastic behaviour of steel column-brace assemblies is analysed. Both column and brace have initial crookedness, and there is an initial lack of fit between column and brace. Realistic magnitudes of crookedness and lack of fit are proposed, and criteria are developed for assessing the strength of the assembly under the braced column load permitted by the SAA Steel Structures Code. Values of the minimum brace areas which satisfy these criteria are determined for assemblies with given column and brace slendernesses and ratios of brace length to column height. It is found that special care may be required when connecting the braces of stocky columns to ensure that overstressing does not occur. Comparisons with the rules of the SAA Steel Structures Code indicate that its brace strength requirements are conservative and its brace stiffness requirements inadequate. A new basis for the design of column braces is proposed.