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Long-Term Behavior of Square CFT Columns with Diaphragm
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 Title & Authors
Long-Term Behavior of Square CFT Columns with Diaphragm
Kwon Seung-Hee; Kim Tae-Hwan; Kim Yun-Yong; Kim Jin-keun;
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This paper presents experimental and analytical studies on long-term behavior of square CFT columns with diaphragm. In order to investigate the effect of the diaphragm on the long~term behavior, experiments for six specimens with two diaphragms and three different column length, and three-dimensional finite element analysis for each specimen have been performed. The finite element models considering the interface behavior between the steel tube and the inner concrete were verified from comparison of the test results with the analysis results. From the test and the analysis results, the following conclusions were obtained. The confinement effect created by the diaphragm does not depends on column length and influences only a part of the whole column that is from the end to the depth which is the same to the width of the column. The shortening of the column with diaphragm which covers more than a half of the cross sectional area of the inner concrete is the same as that of the column under a load applied on the steel tube and the entire section of the inner concrete.
CFT column;diaphragm;long-term behavior;
 Cited by
신형식 CFTA 거더 교량의 구조성능평가,이지오;정민철;박경훈;공정식;

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