Further study on the flexural behaviour of concrete-filled steel tubes

Han, Lin‐Hai; Lü, Hui; Yao, Guo-Huang; Liao, Fei-Yu

doi:10.1016/j.jcsr.2005.09.002

Cited by 150 publications

(68 citation statements)

References 9 publications

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“…While the fresh properties of an SCC mix are quite different to conventional concrete mixes, the hardened strength is very similar [40,41]. Previous investigations of steel specimens filled with SCC include studies on circular and square stub columns [13], CHS tubes in bending [42], CHS columns under eccentric compression [43] and EHS columns under concentric compression [34]. In the present paper, the experimental setups and procedures are first described after which the key test results, including load-lateral deflection curves, loadaxial displacement curves, ultimate capacities and strength and ductility indices are presented.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of slender concrete-filled elliptical hollow section beam-columns

McCann

Gardner

Qiu

2015

Journal of Constructional Steel Research

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Experiments on concrete-filled elliptical hollow section beam-columns have been conducted to examine their fundamental structural behaviour. A total of 27 specimens were tested -3 stub columns and 24 longer members of varying slenderness. Seven of the tested specimens also contained steel reinforcement. The specimens were loaded in compression, either concentrically or with different major or minor axis eccentricities.Measurements of the applied load, the strains at mid-height, the axial displacement and the lateral deflection at mid-height were recorded. Plots of load against the lateral deflection at mid-height and load against axial displacement are presented for the

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Section: Introductionmentioning

confidence: 99%

Experimental study of slender concrete-filled elliptical hollow section beam-columns

McCann

Gardner

Qiu

2015

Journal of Constructional Steel Research

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“…And the construction is simple without complicated pre-stress tensioning. Currently, the properties of CFST had been studied by many researchers [2,3,4], and norms were made in different countries [5]. It is used in building and bridge structures [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Lightweight Aggregate Concrete Filled Steel Tubular Slender Columns Under Axial Compression

Fu¹,

Ji²,

Lv³

et al. 2011

Volume 7 Number 2

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Based on axially compressive tests on 6 short columns and 27 slender columns of lightweight aggregate concrete filled steel tube (LACFST)，macroscopic deformation characters，axial force-longitudinal strain curves，failure mode and failure mechanism are studied. The results are also compared with these of the normal concrete filled steel tube. The test results demonstrated that slenderness ratio is the main influence factor to the behavior of LACFST long columns under axial load. The greater the slenderness ratio is, the lower the ultimate bearing capacity and stability coefficient of the specimen are, and the performances of core concrete affect the stability behavior of lightweight aggregate concrete and normal concrete filled steel tube long columns. The stability coefficient of specimens is determined by the peak strain of concrete and unrelated to the peak strength of concrete. The stability coefficient increases when the peak strain of concrete increasing. Comparison results show that calculation formula in Europe code EC4 (1996) can be applied to calculate the bearing capacity of LACFST columns under axially compressive load.

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“…The predicted load versus lateral deflection curves for the composite beams by AIJ [2], BS5400 [3], Eurocode 4 [4] and LRFD [5] codes have been found in good agreement with experimental values. The flexural behaviour of self-consolidating concrete in-filled steel tubes was studied by Han et al [12]. A total of 36 composite beams filled with self-consolidating concrete were tested to study their flexural behaviour.…”

Section: Previous Researchmentioning

confidence: 99%

Flexural Behaviour of SFRC in-Filled Light Gauge Steel Rectangular Box Sections

Selvan¹,

Nagamani²,

Chandrasekaran³

2007

Volume 3 Number 4

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This paper presents an experimental study on the flexural behaviour of plain cement concrete (PCC) and steel fiber reinforced concrete (SFRC) in-filled light gauge steel rectangular box sections under pure bending. Concrete in-fill provides internal support to the section and delays local buckling. It also contributes to the inertia of the section which increases the flexural strength and stiffness of the member. A reference hollow beam, plain concrete in-filled and SFRC in-filled (with three different volume fraction of fibers) beams are tested up to failure in pure bending with respect to their principal axes. Extensive strain and deformation measurements are taken at compression and tension zones. It is found that the SFRC in-filled sections take more load than hollow and plain concrete in-filled beams when it is subjected to loads about their major and minor axes. In this experimental study, it is observed that SFRC in-filled beams with 1% volume fraction of fibers have enhanced structural properties much more than other types of beams. The moment -strain plots show, a good ductility performance by the hollow and SFRC in-filled beams compared to the plain concrete in-filled beams. A comparison of the observed moment capacities and flexural stiffnesses is made, with the values calculated using the expressions recommended by the various codes of practice such as AIJ, BS 5400, Eurocode 4 & LRFD. It was found that the values predicted by the AIJ code agree reasonably well with the experimental results. The codes developed for ordinary cement concrete in-filled beams require modifications when they are applied to high performance concretes such as SFRC in-filled composite beams.Keywords: Hollow; PCC and SFRC in-filled beams; pure bending; flexural stiffness; flexural strength; ductility INTRODUCTIONHybrid structures such as concrete-filled or Steel Fiber Reinforced Concrete (SFRC) in-filled steel hollow sections are very effective in special types of applications such as piles, poles, highway overhead sign structures, bridge components, etc. Concrete-filled steel hollow section (CFSHS) columns are widely used in the construction industry for the past few years owing to the advantages of combining two materials. The steel hollow sections in-filled with concrete have higher strength and greater stiffness than the conventional structural steel sections and reinforced concrete sections. Concrete being a brittle material, has low tensile strength and low ductility. Steel fiber reinforced concrete, a two phase composite material, having randomly distributed steel fibers, has higher resistance against cracking, improved strength in shear, tension, compression and flexure with better toughness and ductility as compared to plain concrete. The addition of randomly distributed fibers improves many properties of concrete such as fracture strength, toughness, impact resistance, flexural strength and fatigue resistance. Both ductility and structural performance factors depend on the structural form selected and the m...

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Further study on the flexural behaviour of concrete-filled steel tubes

Cited by 150 publications

References 9 publications

Experimental study of slender concrete-filled elliptical hollow section beam-columns

Experimental study of slender concrete-filled elliptical hollow section beam-columns

Behavior of Lightweight Aggregate Concrete Filled Steel Tubular Slender Columns Under Axial Compression

Flexural Behaviour of SFRC in-Filled Light Gauge Steel Rectangular Box Sections

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