Stress–strain behaviour of high-strength concrete at elevated temperatures

Fu, Y.F.; Wong, Yi Lin; Poon, Chi Sun; Tang, Chun An

doi:10.1680/macr.2005.57.9.535

Cited by 51 publications

(25 citation statements)

References 14 publications

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“…The strain corresponding to peak stress starts to increase, especially above 500 ∘ C. This increase is significant and the strain at peak stress can reach four times the strain at room temperature. HSC specimens exhibit a brittle response as indicated by postpeak behavior of stress-strain curves shown in Figure 9 [74]. In the case of fiber-reinforced concrete, especially with steel fibers, the stress-strain response is more ductile.…”

Section: Stress-strain Responsementioning

confidence: 99%

Properties of Concrete at Elevated Temperatures

Kodur

2014

ISRN Civil Engineering

424

243

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Fire response of concrete structural members is dependent on the thermal, mechanical, and deformation properties of concrete. These properties vary significantly with temperature and also depend on the composition and characteristics of concrete batch mix as well as heating rate and other environmental conditions. In this chapter, the key characteristics of concrete are outlined. The various properties that influence fire resistance performance, together with the role of these properties on fire resistance, are discussed. The variation of thermal, mechanical, deformation, and spalling properties with temperature for different types of concrete are presented.

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Section: Stress-strain Responsementioning

confidence: 99%

Properties of Concrete at Elevated Temperatures

Kodur

2014

ISRN Civil Engineering

424

243

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“…The failure mode of the specimens becomes more ductile with an increase in temperature. Overall, the stress–strain characteristics of lower strength SCC at high temperatures are similar to those of conventional high strength concrete .…”

Section: Stress Strain Full Curves Of Self‐compacting Concretementioning

confidence: 64%

Thermal stress–strain of self‐compacting concrete in compression

2012

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Self‐compacting concrete or self‐consolidation concrete (SCC) is being used in underground and other industrial structures that may be subjected to high temperatures during operation or in case of an accidental fire. The proper understanding of the effects of elevated temperatures on the stress–strain relationship of SCC is necessary in the assessment of structural safety. This paper presents the high temperature behavior from an experimental study carried out on SCC subjected to high temperatures. The effects of temperature, strength grade, and polypropylene (PP) fibers on the initial elastic modulus, strain at peak stress, and stress–strain curves of SCC are studied, which offered a test basis for estimating the deformation of SCC under high temperature. An empirical constitutive formula for the thermal stress–strain of SCC is developed on the basis of the deformation characteristics of PP fiber‐modified SCC. Copyright © 2012 John Wiley & Sons, Ltd.

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“…The heating criterion was that, when the core temperature reached a certain value, the furnace would be shut down immediately. Since most of the explosive spalling occurs in the temperature range of 200℃ to 400℃ (Kanéma et al 2011, Fu et al 2005, Fu and Li 2011, Kanema et al 2011, 400℃ was chosen as the threshold value to guarantee the whole specimen would be out of the suspected range of spalling, because the peripheral temperature must be higher than 400℃ when the core temperature reaches 400℃. Supposing that spalling does not occur by this time, we can properly assume that spalling would not occur even if the heating is continued.…”

Section: Determination Of Heating Timementioning

confidence: 99%

High Strength Concrete Tests under Elevated Temperature

Wu¹,

Lo²,

Tan³

et al. 2019

AJTE

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In recent years, application of high strength concrete (HSC) has attracted increasing interest in the construction industry due to its significant economic, architectural, and structural advantages, compared to the conventional normal strength concrete (NSC). However, under fire condition, which is one of the most common hazards that attack building structures, HSC members may be subjected to explosive spalling. Strength reduction of structural members may occur, leading to severe consequences such as failure of members or even collapse of the whole structure. A newly designed 2layered cylindrical specimen consisting of an HSC core and an NSC outer layer is proposed to improve the fire performance of HSC members under elevated temperature. The NSC layer is designed to act as an outer layer insulation to reduce the thermal gradient and also serve as a lateral confinement to prevent the HSC core from spalling. Compression and thermal tests were performed on the specimens to investigate their strength and behavior under elevated temperature. Test results preliminarily verify the feasibility of 2-layered design and at the same time provide insights for the applicability of 2-layered columns in practical construction projects.

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Stress–strain behaviour of high-strength concrete at elevated temperatures

Cited by 51 publications

References 14 publications

Properties of Concrete at Elevated Temperatures

Properties of Concrete at Elevated Temperatures

Thermal stress–strain of self‐compacting concrete in compression

High Strength Concrete Tests under Elevated Temperature

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