Experimental investigation of eccentrically loaded fibre reinforced concrete-filled stainless steel tubular columns

Ellobody, Ehab; Ghazy, Mariam Farouk

doi:10.1016/j.jcsr.2012.04.001

Cited by 70 publications

(23 citation statements)

References 15 publications

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“…Additionally, both the internal concrete and the tubular steel shell bear the axial pressure, thereby enhancing the geometric stability and avoiding the premature local buckling damage of the steel tube wall. In addition, the CSTC structure has a cylindrical shape, and this form demonstrates a higher bending stiffness and is not easily distorted; therefore, it is more structurally stable . The CSTC structure is presented in Figure .…”

Section: Cstc Bearing Capacity Analysesmentioning

confidence: 99%

Application of concrete‐filled steel tubular columns in gob‐side entry retaining under thick and hard roof stratum: A case study

Huang

Wang

Yusan

et al. 2019

Energy Science & Engineering

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The successful retaining of the gob‐side entry under a thick and hard roof stratum is difficult because of the high pressure present and complex construction technology commonly used. To solve this problem, a new type of gob‐side entry supporting system is proposed in this paper. This system is mainly composed of concrete‐filled steel tubular columns (CSTCs), flexible cushion, and gob isolation structures. This new supporting system combines the high‐strength support of CSTCs with the flexible support of cushion bodies and is simple to construct, enabling fast and efficient gob‐side entry retaining under a thick and hard roof stratum. The range of the roof strata controlled by gob‐side support structures is determined for a case study, and a calculation formula for the gob‐side support resistance is established. Through theoretical and experimental research, a reasonable calculation formula for the choice of CSTC is also established. The CSTC structure ultimately selects Φ194 × 8 mm hollow steel tubes and C40 grade concrete for use in a field application, which can provide 4814 kN of supporting force. A simple on‐site construction process is designed for the field application, and the time required for entry retaining per meter is only approximately 40‐45 minutes. This application shows that the new technology controls the deformation of the retained entry very well; the final deformation stabilizes at 412 mm, which meets the engineering requirements.

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Section: Cstc Bearing Capacity Analysesmentioning

confidence: 99%

Application of concrete‐filled steel tubular columns in gob‐side entry retaining under thick and hard roof stratum: A case study

Huang

Wang

Yusan

et al. 2019

Energy Science & Engineering

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“…Ellobody and Ghazy [27] tested circular plain CFSST short columns and fiber reinforced CFSST slender beam-columns. Experimental studies on rectangular CFSST slender columns under biaxial loads were reported by Tokgoz [28].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear analysis of circular high strength concrete-filled stainless steel tubular slender beam-columns

Patel

Liang

Hadi

2017

Engineering Structures

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Nonlinear analysis of circular high strength concrete-filled stainless steel tubular slender beam-columns AbstractConcrete-filled stainless steel tubular (CFSST) slender columns are increasingly used in composite structures owing to their distinguished features, such as aesthetic appearance, high corrosion resistance, high durability and ease of maintenance. Currently, however, there is a lack of an accurate and efficient numerical model that can be utilized to determine the performance of circular CFSST slender columns. This paper describes a nonlinear fiber-based model proposed for computing the deflection and axial load-moment strength interaction responses of eccentrically loaded circular high-strength CFSST slender columns. The fiber-based model incorporates the accurate three-stage stress-strain relations of stainless steels, accounting for different strain hardening characteristics in tension and compression. The material and geometric nonlinearities as well as concrete confinement are included in the computational procedures. Existing experimental results on axially loaded CFSST slender columns are utilized to verify the proposed fiber-based model. A parametric study is conducted to examine the performance of high-strength slender CFSST beam-columns with various geometric and material parameters. It is shown that the fiber-based analysis technique developed can accurately capture the experimentally observed performance of circular high-strength CFSST slender columns. The results obtained indicate that increasing the eccentricity ratio, column slenderness ratio and diameter-to-thickness ratio remarkably decreases the initial flexural stiffness and ultimate axial strength of CFSST columns, but considerably increases their displacement ductility. Moreover, an increase in concrete compressive strength increases the flexural stiffness and ultimate axial strength of CFSST columns; however, it decreases their ductility. Furthermore, the ultimate axial strength of CFST slender columns is found to increase by using stainless steel tubes with higher proof stresses. decreases their ductility. Furthermore, the ultimate axial strength of CFST slender columns is found to increase by using stainless steel tubes with higher proof stresses.

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“…It is known that the inclusion of steel fibers improves ductility and deformability of high strength concrete and it eliminates crack propagation. Thus, steel fiber concrete is an effective in-filled material for high strength stainless steel tubes in order to show better structural performance [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Lam and Gardner [9] presented behavior and design of axially loaded concrete-filled stainless steel circular and square hollow sections. Ellobody and Ghazy [10] and Ellobody [11,12] studied eccentrically loaded plain and fiber reinforced concrete-filled stainless steel circular tubular columns. Young [13] described experimental and numerical investigation of cold-formed high strength stainless steel tubular structures.…”

Section: Introductionmentioning

confidence: 99%

Tests on plain and steel fiber concrete-filled stainless steel tubular columns

Tokgöz

2015

Journal of Constructional Steel Research

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Experimental investigation of eccentrically loaded fibre reinforced concrete-filled stainless steel tubular columns

Cited by 70 publications

References 15 publications

Application of concrete‐filled steel tubular columns in gob‐side entry retaining under thick and hard roof stratum: A case study

Application of concrete‐filled steel tubular columns in gob‐side entry retaining under thick and hard roof stratum: A case study

Nonlinear analysis of circular high strength concrete-filled stainless steel tubular slender beam-columns

Tests on plain and steel fiber concrete-filled stainless steel tubular columns

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