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Cyclic response of hollow and concrete-filled circular hollow section braces

Sheehan, Therese
Chan, T.M.
Publication Date
2014
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© 2014 ICE. Reproduced in accordance with the publisher's self-archiving policy.
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yes
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Accepted for publication
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Abstract
The behaviour of seismic-resistant buildings relies heavily upon the inclusion of energy dissipating devices. For concentrically-braced frames, this function is accomplished by diagonal bracing members whose performance depends upon both cross-sectional properties and global slenderness. Traditionally preferred rectangular hollow sections are susceptible to local buckling, particularly in cold-formed tubes, owing to the residual stresses from manufacture. This paper explores the response of hollow and concrete-filled circular tubes under cyclic axial loading. The uniformity of the circular cross-section provides superior structural efficiency over rectangular sections and can be further optimised by the inclusion of concrete infill. A series of experiments was conducted on filled and hollow specimens to assess the merit of the composite section. Comparisons were drawn between hot-finished and cold-formed sections to establish the influence of fabrication on member performance. Two specimen lengths were utilised to assess the influence of non-dimensional slenderness. Parameters such as ductility, energy dissipation, tensile strength and compressive resistance are presented and compared with design codes and empirically derived predictions.
Version
Published version
Citation
Sheehan, T. and Chan, T. M. (2014) Cyclic response of hollow and concrete-filled circular hollow section braces. Proceedings of the Institution of Civil Engineers: Structures and Buildings. 167 (3): 140-152.
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Type
Journal Article
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