Experimental Tests on High-Strength Concrete Columns Subjected to Combined Medium Axial Load and Flexure

Ho, Johnny Ching Ming (2012) Experimental Tests on High-Strength Concrete Columns Subjected to Combined Medium Axial Load and Flexure. Advances in Structural Engineering, 15 8: 1359-1374. doi:10.1260/1369-4332.15.8.1359


Author Ho, Johnny Ching Ming
Title Experimental Tests on High-Strength Concrete Columns Subjected to Combined Medium Axial Load and Flexure
Journal name Advances in Structural Engineering   Check publisher's open access policy
ISSN 1369-4332
2048-4011
Publication date 2012-08-01
Year available 2012
Sub-type Article (original research)
DOI 10.1260/1369-4332.15.8.1359
Open Access Status Not Open Access
Volume 15
Issue 8
Start page 1359
End page 1374
Total pages 16
Place of publication Essex, United Kingdom
Publisher Multi-Science Publishing Co. Ltd.
Language eng
Formatted abstract
To resist large deformability demand due to earthquake attack, high-strength concrete (HSC) columns of tall buildings in high seismicity regions are designed to be fully ductile by providing heavy confining steel in the plastic hinge region. However, in areas of low to moderate seismic risks, where the columns are subjected to reduced seismic demand, the same provision of confining steel causes unwanted increase in construction cost (i.e. less cost effective) and embodied energy or carbon level of the structures (i.e. less environmentally friendly). Especially for ultra-HSC columns, the required confining steel will be too large to be provided in the plastic hinge region, which adversely affects the concrete placing quality. To alleviate the problem, a series of experimental tests on HSC columns that contain less confining steel than that of fully ductile columns in the plastic hinge region was carried out to investigate their performance under medium axial load and flexure. From the obtained test results, it was found that these columns perform better than the HSC columns without sufficient confining steel. Also, the drift of these columns can reach about 3% and the respective curvature ductility factors of about 10.
Keyword Axial load
Columns
Confinement effect
Flexural strength
High strength concrete
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: Fri, 24 Oct 2014, 03:33:25 EST by Johnny Ho on behalf of School of Civil Engineering