Prediction of the squash loads of concrete-filled tubular section columns with local buckling

Title
Prediction of the squash loads of concrete-filled tubular section columns with local buckling
Author(s)
권영봉서상정[서상정]강두원[강두원]
Keywords
BOX COLUMNS; TESTS
Issue Date
201101
Publisher
ELSEVIER SCI LTD
Citation
THIN-WALLED STRUCTURES, v.49, no.1, pp.85 - 93
Abstract
This paper describes a series of compression tests of circular hollow steel (CHS) sections and circular concrete-filled tubular (CFT) sections. The diameter to thickness ratios of the test specimens ranged 45-140. This range was set to investigate the effect of local buckling in the circular steel skin on the ultimate strength of CFT columns. The confining effect against filled-in concrete was also studied. A squash load formula for CFT stub columns is proposed to account for the post-local-buckling strength of steel skin. The ultimate strength of steel skin was predicted by a kind of Direct Strength Method (DSM). The proposed DSM does not require the computation of the effective area of the steel skin, but uses the gross area of the steel skin and the design strength formula based on various test results. The compressive strength formula of the filled-in concrete accounting for the strength ratio of steel skin to filled-in concrete is also proposed to consider the increase in compressive strength of the filled-in concrete, due to the confining effect of the steel skin. The design strengths of CFT columns were compared with the test results for verification. (C) 2010 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/25724http://dx.doi.org/10.1016/j.tws.2010.08.009
ISSN
0263-8231
Appears in Collections:
공과대학 > 건설시스템공학과 > Articles
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