Circular hybrid double-skin tubular columns with a stiffener-reinforced steel inner tube and a large-rupture-strain FRP outer tube: Compressive behavior

Huang, Le; Zhang, Shishun; Yu, Tao; Peng, Kai-Di

doi:10.1016/j.tws.2020.106946

Cited by 37 publications

(7 citation statements)

References 36 publications

(50 reference statements)

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“…The unstiffened, as well as stiffened CFDST columns, have been analyzed with the finite element analysis (FEA) method using (ABAQUS, 2014). This method has also been used in previous studies while investigating the behavior of CFDST columns (Elchalakani et al, 2019;Ghannam and Metwally, 2020;Huang et al, 2010;_ Ipek et al, 2021;Tao et al, 2009). This methodology is preferred due to its effectiveness in studying strenuous structural elements such as, uncommon sections and member sizes, that are not even available in the market and require a lot of effort in construction and testing, under different loading conditions.…”

Section: Methodsmentioning

confidence: 99%

“…In circular-circular CFDST slender columns, subjected to axial load, with stiffeners of different shapes (profiles) in the outer tube as well as in the inner tube, a 15% increase in load carrying capacity has been observed (Ghannam and Metwally, 2020). However, circular CFDST columns, with stiffeners in inner tubes only and FRP outer tubes exhibited 23%-34% enhanced ultimate load-carrying capacity with an increase in ductility of 33.30%-66.70% (Huang et al, 2020;Zakir et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Behavior of partial-length stiffened and full-length stiffened CFDST columns under axial load

Hassan

Bhat

2023

WJE

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Purpose Concrete-filled double skin tube (CFDST) columns are considered one of the most effective steel-concrete composite sections owing to the higher load carrying capacity as compared to its counterpart concrete-filled tube (CFT) columns. This paper aims to numerically investigate the performance of axially loaded, circular CFDST short columns, with the innovative strengthening technique of providing stiffeners in outer tubes. Circular steel hollow sections have been adopted for inner as well as outer tubes, while varying the length of rectangular steel stiffeners, fixed inside the outer tubes only, to check the effect of stiffeners in partially and full-length stiffened CFDST columns. Design/methodology/approach The behaviour of these CFDST columns is investigated numerically by using a verified finite element analysis (FEA) model from the ABAQUS. The behaviour of 20-unstiffened, 80-partially stiffened and 20-full-length stiffened CFDST columns is studied, while varying the strength of steel (fyo = 250–750 MPa) and concrete (30–90 MPa). Findings The FEA results are verified by comparing them with the previous test results. FEA study has exhibited that, there is a 7%–25% and 39%–49% increase in peak-loads in partially stiffened and full-length stiffened CFDST columns, respectively, compared to unstiffened CFDST columns. Originality/value Enhanced strength has been observed in partially stiffened and full-length stiffened CFDST columns as compared to unstiffened CFDST columns. Also, a significant effect of strength of concrete has not been observed as compared to the strength of steel.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behavior of partial-length stiffened and full-length stiffened CFDST columns under axial load

Hassan

Bhat

2023

WJE

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“…For DSTA bridges, the bond between the steel tube and the concrete is of great importance to ensure the composite action between the two. The steel tube-to-concrete bond may be improved by shear connectors which can also serve as the stiffeners to the steel tube to enhance its buckling capacity (Huang et al, 2020; Peng et al, 2018). The connectors may also enhance the confinement to the concrete and play a role in the connections between different components/members if designed properly.…”

Section: Summary and Research Needsmentioning

confidence: 99%

Innovating arch structures with fiber-reinforced polymer composites: A review

Xia

Tao

2023

Advances in Structural Engineering

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Fiber-reinforced polymer (FRP) composites are a class of advanced non-metallic materials featuring advantages of high strength, light weight and excellent corrosion resistance. These advantages, in conjunction with the various methods available for making curved FRP members, create a wide range of possibilities for innovating arch structures with FRP composites. However, this subject has received inadequate research attention despite the exciting prospects demonstrated by pioneer studies. This paper provides a review on this subject with the aim to build a holistic picture and engage wider research participation. The paper begins with an overview of four feasible manufacturing/forming methods (vacuum infusion, filament winding, pultrusion and active bending), with an emphasis on their capability of creating curved FRP members and potential applications in arch structures. A review is next made on previous arch projects and relevant novel concepts, which are classified into two categories (all-FRP arches and FRP-incorporating hybrid arches) with distinct functionality and targeted areas of application. On the basis of this review, directions for future development of each of the two categories are highlighted, with a number of challenges and potential solutions discussed.

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“…Huang et al performed a study on behavior of double‐skin column specimen consisting of outer FRP casing and inner steel casing reinforced with vertical stiffeners under compression loading 39 . The specimens with stiffeners performed well than normal specimens without any stiffening scheme in regard of both strength and ductile behavior.…”

Section: Introductionmentioning

confidence: 99%

Influence of anchored orbicular rings on the performance of sandwich concrete‐filled double‐skin steel tube columns

Singh,

Tiwary

2023

Structural Concrete

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Since recent years, double‐skin tube column sections formed from two parallel, concentrically spaced steel casings, with the sandwiched area between the casings packed with concrete infill, have been employed extensively. The cross‐sectional shapes of the inner and outer casings might be the same or different, such as round, square, octagonal, etc. These concrete‐filled double‐skin steel tubular (CFDST) columns act similarly to concrete‐filled steel tubular (CFST) sections but have less self‐weight and better stiffness. The present study evaluated the response of CFDST column stiffened with orbicular rings under axial compression. It consists of inner and outer steel tubes stiffened by orbicular rings near both ends of columns. The orbicular rings were provided at different locations as L/3, L/4, and L/5, and a series of tests were conducted to obtain the performance of CFDST columns stiffened with orbicular rings with regard to the maximum load‐carrying capacity, load–strain behavior, and load‐deformation behavior. Furthermore, a parametric study was conducted by varying the diameter to thickness ratio, hollowness ratio, the thickness of orbicular rings, yield strength, and location of orbicular rings. The results showed that CFDST column stiffened with orbicular rings have higher ultimate load capacity than unstiffened CFDST. Stiffened CFDST with orbicular rings showed more ductile response than CFDST column and helps to improve the outer steel tube's restraint on sandwiched concrete. In order to estimate the load‐bearing capacity of CFDST columns stiffened with orbicular rings under axial compression, an empirical equation was proposed. The experimental results and findings of the suggested equations were found to be in good agreement.

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Circular hybrid double-skin tubular columns with a stiffener-reinforced steel inner tube and a large-rupture-strain FRP outer tube: Compressive behavior

Cited by 37 publications

References 36 publications

Behavior of partial-length stiffened and full-length stiffened CFDST columns under axial load

Behavior of partial-length stiffened and full-length stiffened CFDST columns under axial load

Innovating arch structures with fiber-reinforced polymer composites: A review

Influence of anchored orbicular rings on the performance of sandwich concrete‐filled double‐skin steel tube columns

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