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Journal of the Korea Concrete Institute

J Korea Inst. Struct. Maint. Insp.
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  • Korea Citation Index (KCI)

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Title Static Behavior of Concrete-Filled and Tied Steel Tubular Arch(CFTA) Girder
Authors 김종인 ; 김두기 ; 이장형 ; 김정호
Page pp.225-231
ISSN 1226-6205
Keywords CFTA거더 ; 복합구조 ; 콘크리트충진 ; 선형해석 ; CFTA girder ; Composite structure ; Concrete-filled ; Linear analysis
Abstract This study introduces the CFTA girder(Concrete-Filled and Tied Steel Tubular Arch Girder) which is a combined structural system of traditional CFT, arch, and prestress structures. Static load tests and structural behavior analyses were carried out for a 25m long CFTA girder. In the analysis, each load of 58kN, 88kN, 148kN, 207kN,and 298kN was applied incrementally at the positions of 1.0 m distances in both directions from the center of the girder. On each test, strain and displacement were measured. Linear static FEM analyses using Strand7 code were also performed to check the structural stability and to investigate the effects of prestressing(±20%) and material property(Young`s modulus) on the displacement and strain. The results of this study are summarized as follows: the initial strain & displacement under selfweight and prestressing were influenced with the variation of prestressing, but they were mainly effected only by Young`s modulus when additional loads were applied.