Fire performance of self-consolidating concrete filled double skin steel tubular columns: Experiments

Lü, Hui; Han, Lin-Hai; Zhao, Xiao‐Ling

doi:10.1016/j.firesaf.2009.12.001

Cited by 121 publications

(48 citation statements)

References 12 publications

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“…During this phase, the heat is used to change the state of water into gases rather than to elevate the temperature. This phenomena is also observed by other researchers such as [7] and [8].…”

Section: Resultssupporting

confidence: 87%

Behavior of Fire Exposed Concrete-Filled Double Skin Steel Tubular (CFDST) Columns under Concentric Axial Loads

Zuki

Jayaprakash

Shahidan

et al. 2015

AMM

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Abstract. This paper presents the result of an experimental investigation of axial behavior of concrete-filled double skin steel tubular (CFDST) columns exposed to high temperature under the action of monotonically applied concentric axial loads. The columns were exposed to ASTM E-119 standard fire curve until 600°C and kept constant for two different exposure time (i.e., 60 and 90 minutes). Failure patterns and reduction in strength, ductility and stiffness of CFDST columns are reported. Factors influencing the strength, ductility and stiffness of CFDST columns during fire exposure, i.e., exposure time, temperature of concrete core and temperature of inner steel tube, are also discussed.

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Section: Resultssupporting

confidence: 87%

Behavior of Fire Exposed Concrete-Filled Double Skin Steel Tubular (CFDST) Columns under Concentric Axial Loads

Zuki

Jayaprakash

Shahidan

et al. 2015

AMM

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“…Experimental results are available from previous investigations by the authors [17], as well as from a previous research from Lu et al [14]- [16]. The columns used for the comparison are summarized in Table 1a.…”

Section: Validation Of Type I Sections (Cfdst)mentioning

confidence: 99%

“…Lu et al [14]- [16] performed a series of fire tests on concrete-filled double-skin tubes (CFDST) on a collaborative project between Monash University and Tsinghua University, studying both stub and slender columns. The critical or limiting temperature for double-skin sections was found to be higher than for CFST sections, due to the thermal protection of the inner steel tube offered by the concrete ring.…”

Section: Introductionmentioning

confidence: 99%

Fire performance of innovative steel-concrete composite columns using high strength steels

Espinós

Romero

Lam

2016

Thin-Walled Structures

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This paper presents the results of a numerical investigation on strategies for enhancing the fire behaviour of concrete-filled steel tubular (CFST) columns by using inner steel profiles such as circular hollow sections (CHS), HEB profiles or embedded steel core profiles. A three-dimensional finite element model is developed for that purpose, which is capable for representing the various types of sections studied and the nonlinear behaviour of the materials at elevated temperatures. High strength steel is considered in the numerical model, as a possible way to lengthen the fire endurance. The numerical model is validated against experimental results available in the literature for various types of steel-concrete composite sections using inner steel profiles, obtaining satisfactory results. Based on the developed numerical model, parametric studies are conducted for investigating the influence of the cross-sectional geometry and the steel grade of the inner profiles on the fire performance of these composite columns, for eventually providing some practical recommendations.

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“…Two strategies can be considered to increase the fire resistance of CFST columns: On one hand the usage of innovative cross-sections like doubleskin and double-tube columns (Zhao et al [5], [6], Han et al [7] or Romero et al [8]), and on the other hand the improvement of the fire resistance by using advanced materials in columns and connections. Nonetheles, in this paper the emphasis is on the materials.…”

Section: Introductionmentioning

confidence: 99%

Advanced materials for concrete-filled tubular columns and connections

et al. 2015

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The advantages of concrete-filled steel tubular (CFST) columns are well known at room and elevated temperatures, however, beyond a certain slenderness their load-bearing capacity starts to decrease. Besides, blind-bolts represent a proper system to allow endplate bolted connections to hollow steel tubular columns and CFST, although the resistance of the bolt shank conditions affects the performance of the connection. In this paper, the use of innovative materials is proposed as a method of enhancing of the load-bearing capacity for both CFST columns and connections. In this line, a first approach of the benefits using high strength steel, fire-resistant steel and geopolymer concrete applied for CFST columns in the fire situation is developed, obtaining better fire results although depending on the columns cross-sections configuration and the part where the advanced material is applied. Related to blind-bolts connections under fire conditions, the use of fire-resistant bolts is assessed. Their higher strength retention in fire could avoid the use of protection, but only in limited cases. Furthermore, a preliminary study on shape memory alloys in the blind-bolts is performed at room temperature and supporting cyclic pull-out loading.

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Fire performance of self-consolidating concrete filled double skin steel tubular columns: Experiments

Cited by 121 publications

References 12 publications

Behavior of Fire Exposed Concrete-Filled Double Skin Steel Tubular (CFDST) Columns under Concentric Axial Loads

Behavior of Fire Exposed Concrete-Filled Double Skin Steel Tubular (CFDST) Columns under Concentric Axial Loads

Fire performance of innovative steel-concrete composite columns using high strength steels

Advanced materials for concrete-filled tubular columns and connections

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