Behaviour and residual compression resistances of circular high strength concrete-filled stainless steel tube (HCFSST) stub columns after exposure to fire

He, Anrui; Liang, Yating; Zhao, Ou

doi:10.1016/j.engstruct.2019.109897

Cited by 33 publications

(9 citation statements)

References 33 publications

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“…In general, the design methods provide rather conservative predictions for specimens with grade C40 concrete, but the conservatism reduces for those with higher concrete grades (C80 and C120), particularly for cross-sections of low slenderness. This observation mirrors previous findings for CFST sections [14][15][16][17][18] and CFDST sections [8,20];…”

Section: Modification For High Strength Concretesupporting

confidence: 92%

“…Particularly, stocky cross-sections exhibit increased load-bearing capacities beyond the plastic resistance and higher deformation capacities; this is attributed to the substantial strain hardening of the stainless steel material. The axial compressive behaviour of square and rectangular stainless steel CFST sections has also been recently explored by [13][14][15][16][17][18]; the significant influence of the slenderness of the metal tube on the load-bearing capacity and ductility was highlighted in these studies. Uy et al [13] documented a rather more rounded and ductile load-deformation response of stainless steel CFST stub columns compared to that of carbon steel CFST stub columns.…”

Section: Introductionmentioning

confidence: 99%

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CFDST sections with square stainless steel outer tubes under axial compression: Experimental investigation, numerical modelling and design

Wang

Young²,

Gardner

2020

Engineering Structures

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The use of concrete-filled double skin tubular (CFDST) cross-sections for compression members has become increasingly popular in construction. A recently proposed innovative form of CFDST cross-section, ultilising stainless steel for the outer tube, offers the combined advantages of the composite action seen in CFDST member alongside the durability and ductility associated with stainless steel. CFDST sections with stainless steel outer tubes, for which there are currently little experimental data, are the focus of the present study. A comprehensive experimental and numerical investigation into the compressive behaviour of CFDST sections with square stainless steel outer tubes is presented in this paper. A total of 19 specimens was tested under uniform axial compression, and the test observations are fully reported. The ultimate loads, load-displacement curves and failure modes from the tests were used for the validation of finite element (FE) models. Parametric finite element analyses were then performed. The combined set of experimentally and numerically derived data was employed to assess the applicability of the existing European, Australian and American design 2 provisions for composite carbon steel members to the design of the studied CFDST crosssections. Overall, the existing design rules are shown to provide generally safe-sided (less so for the higher concrete grades) but rather scattered capacity predictions. Modifications to the current design codes are also considered-a higher buckling coefficient k of 10.67 to consider the beneficial restraining effect of the concrete on the local buckling of the stainless steel outer tubes, as well as a reduction factor η to reflect the reduced relative effectiveness of higher concrete grades. Overall, the comparisons demonstrated that improved accuracy and consistency were achieved when the modified design rules were applied.

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Section: Modification For High Strength Concretesupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

CFDST sections with square stainless steel outer tubes under axial compression: Experimental investigation, numerical modelling and design

Wang

Young²,

Gardner

2020

Engineering Structures

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“…FE models of all test specimens presented in Section 2 were established employing C3D8R [25] solid elements for the concrete and S4R [25] shell elements for the metal tubes, in line with previous numerical modelling of concrete-filled tubular members [11,12,[26][27][28][29]. A systematic mesh sensitivity study was undertaken to decide upon suitable mesh settings for the FE models, in order to produce accurate yet computationally efficient results.…”

Section: Element Types and Discretisationmentioning

confidence: 99%

Compressive behaviour and design of CFDST cross-sections with stainless steel outer tubes

Wang

Young

Gardner

2020

Journal of Constructional Steel Research

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A finite element (FE) investigation into the compressive behaviour of concrete-filled double skin tubular (CFDST) cross-sections with lean duplex and ferritic stainless steel outer tubes is presented. FE models were initially developed and validated against available test results reported in the literature. Upon successful replication of the ultimate capacities, loaddeformation histories and failure modes exhibited by the tested CFDST stub columns, a parametric study was undertaken to investigate the influence of key variables, including the local slendernesses of the outer and inner tubes, the concrete strength and the adopted grade of stainless steel, on the ultimate response of the studied CFDST stub columns. Based on the generated FE data pool and the available test results, the applicability of the existing European, Australian and American design provisions for composite carbon steel members to the design of the studied CFDST cross-sections was evaluated. All the examined design rules are shown to yield unduly conservative (less so for the higher concrete grades) and rather scattered capacity predictions. Modifications to the design treatment in relation to the effective area of the outer tubes, to take due account of outward-only local buckling, and the effective compressive strength of the infilled concrete, to reflect the reduced relative effectiveness of higher concrete grades, are considered. The modified design rules are shown to improve the accuracy and consistency of the design capacity predictions. Finally, statistical analyses were carried out to demonstrate the reliability of the modified design approaches.

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“…Among the existing column types, steel-concrete composite columns have high profitability and various advantages [1]. In this type of columns, there are the steel-reinforced concrete columns (SRC), concrete-filled steel tubular columns (CFST), concrete-filled double skin steel tubular columns (CFDST), steel-reinforced concrete-filled steel tubular columns (SRCFST), among others [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

Suárez

Abril

2022

J. Phys.: Conf. Ser.

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In the present investigation, an analysis of the fire resistance of the steel-reinforced concrete-filled steel tubular columns with circular cross-sections was carried out by means of numerical simulation. The development of the study was carried out by means of numerical simulation to predict the behavior of the column against fire. The results of the numerical model are validated by comparing the temperature levels obtained through experimental tests. From the results obtained, it is shown that the increase in the contact area between the steel and the concrete reduces the average temperature of the column, which implies a greater resistance to fire. The fire resistance of the columns with the steel profile designs are between 3.4 - 3.6 times higher compared to the column only made of concrete, which is an indication of the excellent performance of the steel-reinforced concrete-filled steel tubular columns with circular cross- sections columns. In general, the methodology proposed in this research allows the analysis of the thermal physical phenomena of the different columns used for the construction of buildings.

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Behaviour and residual compression resistances of circular high strength concrete-filled stainless steel tube (HCFSST) stub columns after exposure to fire

Cited by 33 publications

References 33 publications

CFDST sections with square stainless steel outer tubes under axial compression: Experimental investigation, numerical modelling and design

CFDST sections with square stainless steel outer tubes under axial compression: Experimental investigation, numerical modelling and design

Compressive behaviour and design of CFDST cross-sections with stainless steel outer tubes

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

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