Published Resources Details
Journal Article
- Title
- Local buckling and confinement in axially loaded steel tubes filled with normal and high strength concrete
- In
- Australian journal of structural engineering
- Imprint
- vol. 2, no. 2,3, 1999, pp. 123-133
- Description
[This paper was awarded the R. W. Chapman Medal 2000]
- Abstract
Concrete-filled steel tubes are an appropriate solution for columns in high rise structures where the columns are mainly subjected to axial load. For economy using less of the expensive steel and more of the cheaper concrete, the tubes now tend to be thin-walled and filled with very high strength concrete. However, this raises questions about the effects of local buckling of the thin-walled steel tube and the effects of confinement on the concrete, particularly with the use of high strength concrete. A comprehensive set of tests has now been completed to examine these issues amongst others. This has enabled current design procedures to be reviewed and modifications to be made. Although not recognised at the time, the behaviour on which current design rules were developed was often complex, particularly that concerning local buckling, the effects of confinement, the performance of very high strength concrete and the influence of bond, or lack of it. This paper examines each of the concepts and explains the phenomena that were observed in the tests, thereby providing the fundamental basis on which the design rules can be reviewed and modified.