Effect of elevated temperature on the mechanical properties of high-strain-rate-induced partially damaged concrete and CFSTs

Mirmomeni, Mahsa; Heidarpour, Amin; Zhao, Xiao Ling; Packer, Jeffrey A.

doi:10.1016/j.ijimpeng.2017.02.006

Cited by 27 publications

(7 citation statements)

References 30 publications

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“…Few research works are available in the literature about the evaluation of the concrete impact strength after high temperature exposure, most of which investigate high-strain rate impact tests and blast tests [27][28][29][30][31], while a very limited number of works were found on low-velocity impact tests on reinforced concrete members [18,32]. Most of these works developed numerical analyses to evaluate the dual effect of high temperature and high-strain rate impacts on reinforced concrete and composite structural members [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Residual Repeated Impact Strength of Concrete Exposed to Elevated Temperatures

et al. 2021

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Portland cement concrete is known to have good fire resistance; however, its strength would be degraded after exposure to the temperatures of fire. Repeated low-velocity impacts are a type of probable accidental load in many types of structures. Although there is a rich body of literature on the residual mechanical properties of concrete after high temperature exposure, the residual repeated impact performance of concrete has still not been well explored. For this purpose, an experimental study was conducted in this work to evaluate the effect of high temperatures on the repeated impact strength of normal strength concrete. Seven identical concrete patches with six disc specimens each were cast and tested using the ACI 544-2R repeated impact setup at ambient temperature and after exposure to 100, 200, 300, 400, 500 and 500 °C. Similarly, six cubes and six prisms from each patch were used to evaluate the residual compressive and flexural strengths at the same conditions. Additionally, the scattering of the impact strength results was examined using three methods of the Weibull distribution, and the results are presented in terms of reliability. The test results show that the cracking and failure impact numbers of specimens heated to 100 °C reduced slightly by only 2.4 and 3.5%, respectively, while heating to higher temperatures deteriorated the impact resistance much faster than the compressive and flexural strengths. The percentage reduction in impact resistance at 600 °C was generally higher than 96%. It was also found that the deduction trend of the impact strength with temperature is more related to that of the flexural strength than the compressive strength. The test results also show that, within the limits of the adopted concrete type and conducted tests, the strength reduction after high temperature exposure is related to the percentage weight loss.

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Section: Introductionmentioning

confidence: 99%

Residual Repeated Impact Strength of Concrete Exposed to Elevated Temperatures

et al. 2021

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“…A study has been conducted on the effect of high temperature on partially damaged CFHS column containing self-compacting concrete with 20% FA replacement (Mirmomeni et al, 2017). As previously reported, the confinement effect from outer hollow steel section helps the concrete core to endure the micro-cracking.…”

Section: Utilization Of Different Concretesmentioning

confidence: 99%

A review on utilization of different concretes as in-filled steel hollow column subjected to fire loading

Zuhan

Kadir

Mastor

et al. 2021

JSFE

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Purpose Concrete-filled steel hollow (CFHS) column is an innovation to improve the performance of concrete or steel column. It is believed to have high compressive strength, good plasticity and is excellent for seismic and fire performance as compared to hollow steel column without a filler. Design/methodology/approach Experimental and numerical investigation has been carried out to study the performance of CFHS having different concrete in-fill and shape of steel tube. Findings In this paper, an extensive review of experiment performed on CFHS columns at elevated temperature is presented in different types of concrete as filling material. There are three different types of concrete filling used by the researchers, such as normal concrete (NC), reinforced concrete and pozzolanic-fly ash concrete (FC). A number of studies have conducted experimental investigation on the performance of NC casted using recycled aggregate at elevated temperature. The research gap and the recommendations are also proposed. This review will provide basic information on an innovation on steel column by application of in-filled materials. Research limitations/implications Design guideline is not considered in this paper. Practical implications Fire resistance is an important issue in the structural fire design. This can be a guideline to define the performance of the CFHS with different type of concrete filler at various exposures. Social implications Utilization of waste fly ash reduces usage of conventional cement (ordinary Portland cement) in concrete production and enhances its performance at elevated temperature. The new innovation in CFHS columns with FC can reduce the cost of concrete production and at the same time mitigate the environmental issue caused by waste material by minimizing the disposal area. Originality/value Review on the different types of concrete filler in the CFHS column. The research gap and the recommendations are also proposed.

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“…Based on GB/T50081-2002 [33], all types of specimens were tested by a 1000 KN capacity electro-hydraulic servo universal testing machine (MTS) in different stress rates [34,35]. After 28 d, all specimens were taken out of the curing room and then placed in a laboratory (20 ± 2 • C) for 24 h to dry.…”

Section: Dynamic Compressive Test At Room Temperaturementioning

confidence: 99%

Dynamic Mechanical Behaviors of Desert Sand Concrete (DSC) after Different Temperatures

et al. 2019

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In the building domain, the non-renewable resource of sand is widely used to produce concrete and mortar. The sand production has been estimated to be more than 10 billion tons with a total of 1.2 billion tons used in concrete in the last decade, which causes the gradual reduction of available building materials and impacts the environment. Since there are abundant desert sand resources in northwestern China, it would be viable to utilize desert sand as an alternative material for concrete production. In this study, an investigation of dynamic mechanical behaviors of desert sand concrete (DSC) was conducted. Various desert sand replacement ratios (0–100%) were used to replace the equivalent hill sand as fine aggregate. Experimental results showed that strain rate had a strong effect on the dynamic mechanical behaviors of DSC. The compressive strength (at room temperature) and flexural strength (after elevated temperature) increased with desert sand replacement ratio (DSRR) with the optimum replacement ratio of 40%, which was because the increase of DSRR improved the compaction of DSC. However, the effect of the low strength of desert sand was higher than that of the compaction when the DSSR exceeded 40%, so both strength values generally decreased with the increase of DSRR. Moreover, the dynamic constitutive model of DSC at room temperature was established on the basis of a nonlinear visco–elastic constitutive model (ZWT model), which can predict the stress–strain curves of DSC.

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Effect of elevated temperature on the mechanical properties of high-strain-rate-induced partially damaged concrete and CFSTs

Cited by 27 publications

References 30 publications

Residual Repeated Impact Strength of Concrete Exposed to Elevated Temperatures

Residual Repeated Impact Strength of Concrete Exposed to Elevated Temperatures

A review on utilization of different concretes as in-filled steel hollow column subjected to fire loading

Dynamic Mechanical Behaviors of Desert Sand Concrete (DSC) after Different Temperatures

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