Behaviour of Cold-formed SHS Beam-columns

This paper describes a test programme conducted into the behaviour of cold-formed, compact square hollow section beam columns. The tests were conducted in a purpose built test rig capable of applying load and moment in a constant ratio. The test specimens were pin-ended specimens loaded, with varying load/moment ratios, at two different ratios of end moment. The results of the tests were simulated using a finite element programme. This finite element programme was used to find maximum second order elastic moments, for the section tested, at varying ratios of end moment. The results of this numerical investigation are compared with the relevent interaction design rules from AS4100 (Standards Australia (1990)) and the AISC-LRFD specification (1986)

Behaviour of Cold-Formed Slender SHS Beam-Columns (No. R707)

This research report describes a test programme conducted into the behaviour of cold-formed square hollow section (SHS) beam-columns of slender cross-section and follows an earlier research report into the behaviour of compact SHS beam-columns by the same authors (Sully and Hancock (1994)). The tests were conducted in a purpose built test rig capable of applying load and moment in a constant ratio. The test specimens were pin-ended specimens loaded at two different ratios of end moment. The maximum second order elastic moments are calculated from the maximum applied end moments, and the applied load. Comparison of these moments is made with the interaction design rules from AS4100 Specification (SAA (1990)) and the AISC-LRFD Specification (AISC (1994))

Behaviour of Cold-Formed SHS Beam-Columns (No. R696)

This research report describes a test programme conducted into the behaviour of cold-formed, compact square hollow section beam-columns. the tests were conducted in a purpose built test rig capable of applying load and moment in a constant ratio. the test specimens were pin-ended specimens loaded, with varying load/moment ratios, at two different ratios of end moment. the results of the tests were closely simulated using a finite element programme thereby validating its use in predicting cold-formed tubular beam-column behaviour. the finite element programme was then used to find the maximum load and moment capacity, for the section tested, at varying ratios of end moment, from which the corresponding maximum second order elastic moments were calculated. the results of this numerical investigation are compared with the relevant interaction design rules from AS4100 (Standards Australia (1990)) and the AISC-LRFD specification (1986)