Inelastic design of low-axially loaded high-strength reinforced concrete columns

Ho, J. C. M. and Pam, H. J. (2003) Inelastic design of low-axially loaded high-strength reinforced concrete columns. Engineering Structures, 25 8: 1083-1096. doi:10.1016/S0141-0296(03)00050-6


Author Ho, J. C. M.
Pam, H. J.
Title Inelastic design of low-axially loaded high-strength reinforced concrete columns
Journal name Engineering Structures   Check publisher's open access policy
ISSN 0141-0296
1873-7323
Publication date 2003-07
Sub-type Article (original research)
DOI 10.1016/S0141-0296(03)00050-6
Open Access Status Not yet assessed
Volume 25
Issue 8
Start page 1083
End page 1096
Total pages 14
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Abstract The post-elastic behaviour of low-axially loaded high-strength reinforced concrete (HSRC) columns containing transverse reinforcement designed complying with the shear resistance requirement of BS 8110 and the authors' proposed equation have been studied experimentally. Four HSRC columns, three for the former case and one for the latter, having concrete compressive cube strengths of about 85 MPa (cylinder strength of about 75 MPa) with cross-section dimensions of 325 × 325 mm were fabricated and tested under low compressive axial load as well as reversed cyclic inelastic displacement excursions. From the test results, it was observed that: (1) low-axially loaded HSRC columns designed according to BS 8110 behaved slightly ductile with the ultimate curvature ductility factor reached at least 7, (2) for a given range of volumetric ratio of transverse steel, the flexural ductility of low-axially loaded HSRC columns was not influenced by the transverse steel spacing that is less than three-quarters of the effective depth, (3) a series of single rectilinear closed-hoops of transverse steel was adequate for HSRC columns requiring to behave moderately ductile, and (4) the HSRC column containing transverse reinforcement calculated using the authors' proposed equation behaved in a more ductile manner by achieving an ultimate curvature ductility factor of 12, which is higher than the normally assumed limited ductility measure of 10. Based on these results, some guidelines for the design of low-axially loaded HSRC columns are proposed.
Keyword Columns
Ductility
High-strength concrete
Low axial load
Transverse reinforcement
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Thu, 23 Oct 2014, 18:05:59 EST by Johnny Ho on behalf of Learning and Research Services (UQ Library)