Effect of wide-flange-steel geometry on the long-term shortening of steel-reinforced concrete columns

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Column shortening due to creep and shrinkage of concrete should be predicted accurately, especially in high-rise buildings. One of the main mechanisms of creep and shrinkage is moisture diffusion. However, in steel-reinforced concrete columns, which are widely used in high-rise buildings, the wide-flange steel located inside the column hinders the diffusion of moisture. Consequently, the long-term shortening of the column is delayed due to the slower diffusion. A prediction method that takes into account the actual moisture diffusion inside the column is suggested in this paper. The effect of the wide-flange-steel geometry on the long-term deformation of concrete in a column is precisely demonstrated through parametric studies using this method. The results of the parametric study show that the ratio of the web length of the wide-flange steel to the square column size is one of the main parameters affecting the long-term deformation of concrete in steel-reinforced concrete columns.
Publisher
ICE PUBLISHING
Issue Date
2015-12
Language
English
Article Type
Article
Keywords

DRYING SHRINKAGE; MODEL; CREEP; PREDICTION

Citation

MAGAZINE OF CONCRETE RESEARCH, v.67, no.23, pp.1242 - 1256

ISSN
0024-9831
DOI
10.1680/macr.14.00122
URI
http://hdl.handle.net/10203/205131
Appears in Collection
CE-Journal Papers(저널논문)
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