Analytical modeling of the standard fire behavior of loaded CFT columns

Hong, Sung-Chang; Varma, Amit H.

doi:10.1016/j.jcsr.2008.04.008

Cited by 148 publications

(98 citation statements)

References 27 publications

(92 reference statements)

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“…Varma [28] was employed: c = 6 × 10 -6 ºC -1 . For steel, the temperature dependent values of the thermal expansion coefficient from EN 1993-1-2 [27] were adopted.…”

Section: Materials Models At Elevated Temperaturesmentioning

confidence: 99%

Fire behaviour of concrete filled elliptical steel columns

Espinós

Gardner

Romero

et al. 2011

Thin-Walled Structures

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In this work, a nonlinear three-dimensional finite element model is presented in order to study the behaviour of axially loaded concrete filled elliptical hollow section (CFEHS) columns exposed to fire. This study builds on previous work carried out by the authors on concrete filled circular hollow section (CFCHS) columns both at room temperature and in fire. The numerical model is first validated at room temperature against a series of experiments on CFEHS stub columns available in the literature and subsequently extended to study the performance of slender columns at elevated temperatures. The aim of this work is to understand and represent the behaviour of axially loaded CFEHS columns in fire situations and to compare their effectiveness with that of the circular concrete filled tubular (CFT) columns. Parametric studies to explore the influence of variation in global member slenderness, load level, cross-section slenderness and section size are presented. Finally, guidance on the fire design of CFEHS columns is proposed: it is recommended to follow the guidelines of Clause 4.3.5.1 in EN 1994-1-2, but employing the flexural stiffness reduction coefficients established in the French National Annex with an equivalent EHS diameter equal to P/, where P is the perimeter of the ellipse. Relative errorEspinos A, Gardner L, Romero ML, Hospitaler A. Fire behaviour of concrete filled elliptical steel columns. Thin-Walled Struct.

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“…Varma [28] was employed: c = 6 × 10 -6 ºC -1 . For steel, the temperature dependent values of the thermal expansion coefficient from EN 1993-1-2 [27] were adopted.…”

Section: Materials Models At Elevated Temperaturesmentioning

confidence: 99%

Fire behaviour of concrete filled elliptical steel columns

Espinós

Gardner

Romero

et al. 2011

Thin-Walled Structures

View full text Add to dashboard Cite

show abstract

“…Numerical studies of the behaviour of concrete-filled structural members include the modelling of the material behaviour of confined concrete [5][6][7], simulations of the behaviour of CFST stub columns [10] and complementary analytical modelling of the behaviour of CFST members [38]. Numerical analysis of concrete-filled CHS, SHS and RHS stub columns has been conducted by [39].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns

Qiu

McCann

Espinós

et al. 2017

Engineering Structures

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A numerical model simulating the behaviour of elliptical concrete-filled columns under either concentric or eccentric compressive load has been developed in ABAQUS. The numerical results have been compared against a range of experimental results for ultimate load, load-deflection behaviour and failure modes, with good agreement observed. An extensive parametric study has been undertaken whereby the slenderness, load eccentricity, cross-sectional geometry and reinforcement ratio of the concrete-filled columns were varied, creating a data set upon which to formulate design guidance since currently there are no specific provisions in the European Standard EN 1994-1-1 [1] for the design of concrete-filled steel elliptical section columns or beam-columns. It is shown Qiu, W., McCann, F., Espinos, A., Romero, M. L. and Gardner, L. (2017

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“…(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) In particular, concrete-filled box columns (CFBCs) have several structural and practical benefits compared with bare steel or reinforced concrete columns. (4,12,14) On the other hand, high-performance concrete (HPC) has unique properties in several aspects, such as rheology in its fresh state and strength as well as durability in its hardened state.…”

Section: Introductionmentioning

confidence: 99%

Residual-Load-Bearing Capacity of High-Performance Concrete-Filled Box Columns after Fire

Chen¹,

Yuan‐Chi²,

Chao‐Wei³

et al. 2017

Sensors and Materials

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In recent years, concrete-filled box columns (CFBCs) have been commonly used in high-rise buildings. In particular, steel box columns filled with high-performance concrete (HPC) are more common than concrete-encased steel columns. However, a number of fire test results show that there are significant differences between HPC and normal concrete after being subjected to high temperatures. Therefore, the residual strength of HPC-filled box columns exposed to fire was determined in this study. Two groups of full-size specimens were fabricated. The specimen of the control group was loaded at room temperature to achieve its ultimate load. On the other hand, fire tests were carried out on three specimens of the experimental group to investigate their residualload-bearing capacity after exposure to elevated temperatures (400, 600, and 800 °C). To monitor and measure the temperature of the CFBC specimens during the fire test, an appropriate number of thermocouples were buried inside and outside the column. The thermocouples can effectively measure the temperature of the CFBC specimens during the fire test. The test results show that the residual ultimate strength of CFBC specimens increased at 400 and 600 °C by 5.2 and 1.0% respectively, compared with room-temperature strength. However, with a further increase in temperature to 800 °C, the residual ultimate strength was 15.7% lower than that of the control group at room temperature.

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Analytical modeling of the standard fire behavior of loaded CFT columns

Cited by 148 publications

References 27 publications

Fire behaviour of concrete filled elliptical steel columns

Fire behaviour of concrete filled elliptical steel columns

Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns

Residual-Load-Bearing Capacity of High-Performance Concrete-Filled Box Columns after Fire

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