Experimental and numerical investigation of high-strength steel circular columns subjected to fire

Tondini, Nicola; Hoang, Van Long; Demonceau, Jean-François; Franssen, Jean‐Marc

doi:10.1016/j.jcsr.2012.09.001

Cited by 54 publications

(22 citation statements)

References 8 publications

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“…from Tondini et al [29]. It can be seen that the numerical model predicts well the fire behaviour of CFST columns with HSS, with a good estimation of the axial displacement along the fire exposure time, capturing well the elongation of the outer steel tube and its subsequent yielding and shortening due to thermal degradation.…”

Section: Extension Of the Model To Hssmentioning

confidence: 60%

“…Buildings of recent construction have used HSS, such as the "Freedom Tower" in New York (USA), the Olympic Stadium "Bird's Nest" in Beijing (China) or the Millau viaduct (France) [28]. In Japan, a new building in Kiyose City uses CFST columns combining 700 MPa HSS with ultra-high strength concrete [29].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, Tondini et al [29] presented recently the results of a fire test on a CFST column using HSS, where the superior performance of composite columns made of HSS was proved.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Extension Of the Model To Hssmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Espinós

Romero

Lam

2016

Thin-Walled Structures

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“…1. Tondini et al [19] conducted three fire tests on circular hollow sections (CHS) and an additional fire test on a CFST column using HSS, where the superior performance of these steels was proved. Besides, other report from…”

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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“…Tondini et al (2013), Sun et al (2014), Song et al (2010) and Chen and Young (2008) have focused on steel and composite members as well as steel joints under combined fire and loading conditions. Additionally, important large-scale tests were performed lately by Vassart et al (2012) and Johnston et al (2016).…”

Section: Studies On Members and Large-scale Modelsmentioning

confidence: 99%

Mechanical properties of High and Very High Steel at elevated temperatures and after cooling down

2017

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High-strength steels (HSS) are produced using special chemical composition or/and manufacturing processes. Both aspects affect their mechanical properties at elevated temperatures and after cooling down, and particularly the residual strength and the ductility of the structural members. As HSS equates the design of lighter structural elements, higher temperatures are developed internally compared to the elements designed with conventional carbon steel. Therefore, the low thickness members, along with the severe effect of high temperature on the mechanical properties of the HSS, constitute to the increased vulnerability of such structures in fire. Moreover, the re-use and reinstatement of these structures are more challenging due to the lower residual mechanical properties of HSS after the cooling down period. This paper presents a review of the available experimental studies of the mechanical properties of HSS at elevated temperatures and after cooling down. The experimental results are collected and compared with the proposed material model (reduction factors) of EN1993-1-2. Based on these comparisons, modified equations describing the effect of elevated temperatures on the mechanical properties of HSS are proposed. Also, the post-fire mechanical properties of HSS are examined. A comprehensive discussion on the effect of influencing parameters, such as manufacturing process, microstructure, loading conditions, maximum temperature, and others is further explored.

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Experimental and numerical investigation of high-strength steel circular columns subjected to fire

Cited by 54 publications

References 8 publications

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

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

Advanced materials for concrete-filled tubular columns and connections

Mechanical properties of High and Very High Steel at elevated temperatures and after cooling down

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