Numerical modeling of rectangular concrete-filled double-skin steel tubular columns with outer stainless-steel skin

Le, Tuan Trung; Patel, Vipulkumar Ishvarbhai; Liang, Qing Quan; Huynh, Phat

doi:10.1016/j.jcsr.2020.106504

Cited by 12 publications

(9 citation statements)

References 44 publications

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“…The Abaqus software has been used to investigate the behavior of concentrically compressed CFDST columns with outer square stainless steel tube and inner circular carbon steel skin. A Python script has been developed to automatically undertake the preprocess, run the simulation, and extract the required postprocessing data 13,14,30 . There are two main analysis methods to simulate the three‐dimensional models in Abaqus: Implicit analysis and Explicit analysis 30,31 .…”

Section: Explicit Analysismentioning

confidence: 99%

“…The C3D8R element was also used for the outer and inner steel section since it was proved to be capable of depicting the structural behavior of the steel tubes in concrete‐filled tubular structures 32 . Since the stress is not evenly distributed and concentrates more on the corner region than the flat region in the outer square steel tube, the corner regions were locally seeded into at least six elements for high accuracy 5,14 . To find the most suitable mesh, the smallest mesh size of 5 mm

((), N_{5 mm})

was used as the benchmark and the ratio between various mesh sizes

((), N_{i})

was considered.…”

Section: Explicit Analysismentioning

confidence: 99%

“…The steel stiffeners can be added to improve the lateral strength and postearthquake fire resistance of CFDST columns 8,9 . The corrosion resistance of CFDST columns can be increased by using an outer stainless‐steel skin 10–14 . The inner or outer skin can be made of a circular, rectangular, or square hollow section.…”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that the diameter‐to‐thickness

D_{i} / t_{i}

ratio <40 should be maintained to prevent the local buckling of the inner tube. The numerical model using Abaqus software for the simulation of rectangular CFDST short columns was developed by Le et al 14 The model accounted for the increase in ductility due to the concrete confinement mechanism. Wang et al 10 performed the implicit analysis for ascertaining the behavior of square CFDST short columns with outer square stainless steel tube and inner circular steel tube.…”

Section: Introductionmentioning

confidence: 99%

“…8,9 The corrosion resistance of CFDST columns can be increased by using an outer stainless-steel skin. [10][11][12][13][14] The inner or outer skin can be made of a circular, rectangular, or square hollow section. Figure 1 presents the cross-section of a CFDST column with outer square stainless steel skin and inner circular carbon steel tube.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of square concrete‐filled double‐skin tubular columns with outer stainless‐steel tube

Patel

Liang

et al. 2022

Structural Concrete

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Stainless steel has increasingly been utilized in concrete‐filled composite columns because of its high corrosion resistance and aesthetic appearance. However, there is little published information on the structural behavior of concrete‐filled double‐skin steel tubular (CFDST) columns made of square outer stainless‐steel skin and circular inner carbon steel tubes. The present study focuses on the nonlinear analysis of axially loaded CFDST short columns with outer square stainless steel tube and inner circular carbon steel tube. The explicit analysis methodology is adopted to develop the finite element model of CFDST columns. The verified model is employed to undertake a parametric study on the geometric and material effects on the performance of CFDST columns. The findings indicate that the outer tube diameter‐to‐thickness should be maintained <40 to ensure the required plastic resistance of CFDST columns with hollow ratio in range from 0.34 to 0.42. The design equation for calculating the ultimate axial strength of CFDST columns with outer stainless steel is proposed.

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Section: Explicit Analysismentioning

confidence: 99%