Abstract
The
earthquake resistance of many building structures is provided by steel bracing
members. RHS and CHS members are often
employed as bracing members for structural as well as aesthetic reasons. This paper describes an experimental study of
the response of fixed-ended steel SHS and RHS members to monotonic and cyclic
axial loading. Twenty-one short specimens made from cold-formed steel grade
S235JRH sections with an aspect ratio of three were tested under
displacement-controlled monotonic loading. Eighteen longer specimens with
normalised slendernesses between 0.4 and 3.2 were tested under cyclic axial
displacements of increasing amplitudes.
In both sets of tests, three cross-sectional geometries were employed:
20x20x2.0mm SHS, 40x40x2.5mm SHS and 50x25x2.5mm RHS. The objective of the
short specimen tests was to relate tensile material strength and section
resistance. The observed results are compared to design provisions of Eurocode
3 and AISI. The objective of the tests on longer specimens was to determine
their likely behaviour under strong earthquake loading. The steel hollow brace
members exhibited stable hysteresis behaviour up to local buckling, and then
showed considerable degradation in strength and ductility depending on their
slenderness and b t ratios. First-cycle buckling loads are compared with design
loads predicted by international steel specifications. The effects of section
and member slenderness on the strength, ductility, and energy absorption
capacity of the braces are examined.
| Original language | English (Ireland) |
|---|---|
| Title of host publication | Proceedings of The Second International Conference on Structural Engineering, Mechanics and Computation |
| Place of Publication | Cape Town, South Africa |
| Publication status | Published - 1 Jul 2004 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Goggins J. M., Broderick B. M., Lucas, A. S.