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Title |
Bending Performance Evaluation of Concrete Filled Tubular Structures With Various Diameter-thickness Ratios and Concrete Strengths
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Keywords |
콘크리트 충전강관(CFT) ; 콘크리트 강도 ; 직경-두께비 ; 소성 ; 비선형 유한요소 해석 Concrete filled tubular(CFT) ; Concrete strength ; Diameter-thickness ratio(D/t) ; Plasticity ; Nonlinear finite element analysis |
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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.
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