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http://dx.doi.org/10.11112/jksmi.2009.13.2.223

Bending Performance Evaluation of Concrete Filled Tubular Structures With Various Diameter-thickness Ratios and Concrete Strengths  

Lee, Sang-Youl (중부대학교 산학협력단)
Park, Dae-Yong (대림산업(주) 기술연구소)
Lee, Sang-Bum (SQ엔지니어링(주) 기술연구소)
Lee, Rae-Chul (SQ엔지니어링(주))
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.13, no.2, 2009 , pp. 223-230 More about this Journal
Abstract
In this study we deal with bending behaviors of a concrete filled tubular(CFT) with various diameter-thickness ratios and concrete strengths. In finite element analysis using a commercial package(LUSAS), the bonding effect between concrete and steel in CFT structures is modeled by applying a joint element for the bonding surface. In order to consider the nonlinearity of concrete and steel tubes, stress-strain curves of the concrete and steel are used for the increased stresses in a plastic domain. The numerical results obtained from the proposed method show good agreement with the experimental data from load-displacement curves of a steel tube under distributed loads. Several parametric studies are focused on structural characteristics of CFT under bending effects for different diameter-thickness ratios and concrete strengths.
Keywords
Concrete filled tubular(CFT); Concrete strength; Diameter-thickness ratio( D/t ); Plasticity; Nonlinear finite element analysis;
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