Experimental investigation and design of thin-walled concrete-filled steel tubes subject to bending

Jiang, Ao-yu; Chen, Ju; Jin, Weiliang

doi:10.1016/j.tws.2012.10.008

Cited by 46 publications

(16 citation statements)

References 12 publications

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“…Concrete-filled steel tubular (CFST) arches, which consist of thin-walled steel tubes and concrete cores, are gaining more and more popularity in bridge construction because of their high bearing capacity, light self-weight, and convenient construction [1,2]. The thin-walled steel tube could provide effective confinement for the concrete core and significantly improve its compressive performance and ductility; meanwhile, the concrete core can also provide restraint to improve the local buckling of the steel tube [3].…”

Section: Introductionmentioning

confidence: 99%

Stressing State Analysis on a Single Tube CFST Arch Under Spatial Loads

et al. 2019

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This paper analyzes the stressing state characteristics of a concrete-filled steel tubular (CFST) arch model under spatial loads, using the method of modeling structural stressing state and the thin plate simulating interpolation (TSI) method. Firstly, the parameter-generalized strain energy density (GSED) is applied to model the stressing state of the arch. Then, the normalized GSED sum at each load plots the characteristic curve. The characteristic loads P (66 kN) and Q (85 kN) in the curve are distinguished by the Mann–Kendall (M–K) criterion. To characterize structural axial and bending stressing states, the parameters of the sectional average strain and generalized bending strain are proposed as stressing state submodes. Finally, the TSI method is used to interpolate strain data for deep analysis of internal forces. By modeling the structural stressing state, the working behavior characteristics of arch structures are greatly revealed in a particular view and the results could provide a reference for the development of bridge design.

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Section: Introductionmentioning

confidence: 99%

Stressing State Analysis on a Single Tube CFST Arch Under Spatial Loads

et al. 2019

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“…Additional advantages of this type of CFST column system include (i) construction efficiency due to the elimination of formwork, besides the reduction in manpower, construction cost and construction time, (ii) fire resistance improved by the infilled concrete, and (iii) reduced environmental impact by omitting the formwork. Over the last decades, some studies have been carried out on the flexural behavior of CFST members under pure bending (Lu and Kennedy [3]) (Elchalakani et al [4]) (Gho and Liu [5]) (Han [6]) (Han et al [7]) (Lu et al [8]) (Moon et al [9]) (Jiang et al [10]) (Wang et al [11]). The studies demonstrated the increase in ductility and showed the enhancement in flexural capacity of the composite beams over that of steel hollow sections.…”

Section: Introductionmentioning

confidence: 99%

“…Few researchers reported a very small amount of longitudinal shrinkage at the top of the specimens during curing. In such cases, high-strength epoxy (Han [6]) or high-strength cement mortar (Gho and Liu [5]) (Jiang et al [10]) was used to fill this longitudinal gap. The gap between steel tube and concrete core has been recognized as a type of initial concrete imperfection in CFST circular members (Liao et al [12]).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the flexural behavior of large-scale rectangular concrete-filled steel tubular beams

Flor

Fakury

Caldas

et al. 2017

Rev. IBRACON Estrut. Mater.

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Experimental study on the flexural behavior of largescale rectangular concrete-filled steel tubular beamsEstudo experimental sobre o comportamento à flexão de vigas de aço tubulares retangulares preenchidas com concreto em larga escala Abstract ResumoThis paper presents a series of test results of large-scale rectangular concrete-filled steel tubular (CFST) beams to explore their performance under pure bending. Concrete-filling tests were initially carried out on two beam specimens of 12-m in length to investigate the feasibility of casting horizontally large-scale rectangular tubes. A total of six 6-m long specimens were subjected to flexural test afterward, including four CFST beams and two steel hollow section (SHS) beams for comparison. The test results showed that the rectangular CFST beams behaved in a relatively ductile manner. The concrete infilling enhanced the flexural behavior and performance of the steel tubes. Finally, the rigid-plastic theory showed suitable to predict the moment capacity of CFST compact beams.Keywords: concrete filled steel tube, rectangular section, beam, pure bending, moment capacity.Este artigo apresenta uma série de resultados de ensaios experimentais executados em vigas mistas de aço tubulares retangulares preenchidas com concreto (VMPC) em larga escala para se estudar o comportamento à flexão pura. Inicialmente, foram realizados testes de concretagem em dois protótipos de 12 m de comprimento para se investigar a viabilidade executiva do preenchimento com concreto de tubos de aço retangulares em larga escala posicionados horizontalmente. Na sequência, seis protótipos de 6 m de comprimento foram submetidos ao ensaio de flexão, incluindo quatro VMPC retangulares e duas vigas puramente de aço tubulares retangulares (VA) para comparação. Os resultados dos ensaios mostraram que as VMPC retangulares apresentaram comportamento à flexão relativamente dúctil. O preenchimento de concreto melhorou o comportamento à flexão e o desempenho dos tubos de aço. Finalmente, a teoria rígido-plástica apresentou-se adequada para se estimar a capacidade resistente ao momento fletor de VMPC retangulares compactas.Palavras-chave: tubo de aço preenchido com concreto, seção retangular, viga, flexão pura, capacidade resistente ao momento fletor.

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“…Through a set of 51 CFST members of circular, square and rectangular cross-section, the author concluded that Eurocode 4 is conservative in predicting the capacity of the test specimens, with an average difference of about 10% between the code and the experimental results. More recently, Jiang et al [7] performed bending tests on square and rectangular thinwalled CFSTs, with h/t ratios ranging from 50 to 100. The author demonstrated that Part 1-1 of Eurocode 4 (EC4-1-1) [8] is conservative in predicting the flexural capacity of the test specimens, with an average difference of 9% between the code and the experimental results.…”

Section: Introductionmentioning

confidence: 99%

08.38: Experimental characterisation of the flexural behaviour of rubberized concrete‐filled steel tubular members

et al. 2017

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The main objectives of the research presented in this paper are to investigate the flexural behaviour of Concrete Filled Steel Tube (CFST) columns made with Rubberized Concrete (RuC) and to identify the behavioural differences between this type of composite members and typical (standard concrete) CFST members. The influence of the rubber aggregate replacement ratio on member strength, ductility, and energy dissipation capacity is assessed. The paper begins with a description of the preparation and development of the experimental campaign, which involves the testing of 36 composite specimens (28 RuCFST and 8 standard CFST), and a single circular hollow steel tube. The selection of the specimens took into account a number of geometrical and material parameters, namely the shape of the cross-section (circular, square and rectangular), the cross-section slenderness and the rubber aggregate replacement ratio. A novel testing mechanism was developed as a part of an innovative testing setup, aimed at reducing both the cost and preparation time of the specimens. The columns were tested under both monotonic and cyclic lateral loading, combined with different levels of axial compression. The monotonic results were compared with the expected flexural capacities according to Eurocode 4, and the cyclic results were used to gauge the sectional slenderness limits of Eurocode 8 for different ductility classes. The test results obtained are indicative of the reduced influence of the type of concrete infill on the monotonic and cyclic flexural behaviour of these composite members, and also allow concluding that Eurocode 4 is conservative in predicting the capacity of the tested specimens. Moreover, it was found that the cross-section slenderness does not have a significant influence on the monotonic and cyclic behaviour of the specimens, pointing out for the possible relaxation of the cross-section slenderness limits currently specified in Eurocode 4 and 8.

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Experimental investigation and design of thin-walled concrete-filled steel tubes subject to bending

Cited by 46 publications

References 12 publications

Stressing State Analysis on a Single Tube CFST Arch Under Spatial Loads

Stressing State Analysis on a Single Tube CFST Arch Under Spatial Loads

Experimental study on the flexural behavior of large-scale rectangular concrete-filled steel tubular beams

08.38: Experimental characterisation of the flexural behaviour of rubberized concrete‐filled steel tubular members

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