Behavior of Hybrid FRP-Concrete-Steel Double-Skin Tubular Columns Subjected to Eccentric Compression

Hybrid FRP-concrete-steel double-skin tubular columns (DSTCs) are a new form of hybrid columns recently proposed by the third author. The new column consists of an inner steel tube and an outer FRP tube, with the space between them filled with concrete. The new column possesses many advantages over...

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Bibliographic Details
Published inAdvances in structural engineering Vol. 13; no. 5; pp. 961 - 974
Main Authors Yu, T., Wong, Y.L., Teng, J.G.
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.10.2010
Subjects
Columns (structural)
Compressing
Concretes
Confinement
Eccentrics
Mathematical models
Structural steels
Tubes
concrete
steel
eccentric compression
hybrid members
FRP
tubular members
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Summary:Hybrid FRP-concrete-steel double-skin tubular columns (DSTCs) are a new form of hybrid columns recently proposed by the third author. The new column consists of an inner steel tube and an outer FRP tube, with the space between them filled with concrete. The new column possesses many advantages over existing columns including its good ductility, corrosion resistance and ease for construction. This paper presents the results of an experimental study on the behavior of the new hybrid DSTCs subject to eccentric compression as well as results from a corresponding theoretical model using the fiber element approach. A so-called “variable confinement model” was adopted in the theoretical analysis for the concrete in the hybrid DSTCs, to account for the effect of strain gradient on the confinement effectiveness. The theoretical model was shown to provide accurate predictions of the test results, and was used in a subsequent parametric study.
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ISSN:1369-4332
2048-4011
DOI:10.1260/1369-4332.13.5.961