Deformation capturing of concrete structures at elevated temperatures

Le, Dinh Ba; Tran, Son Duy; Dao, Vinh; Torero, José L.

doi:10.1016/j.proeng.2017.11.121

Cited by 11 publications

(4 citation statements)

References 14 publications

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“…Digital Image Correlation (DIC) has the advantages of high accuracy, non-contact measurement, no special requirements for the environment, and the ability to give information on the deformation of a specimen in any area and in any direction during loading, and is therefore widely used in the fields of solid mechanics and applied physics, and is now gradually being applied to research on construction materials. The accuracy of DIC in testing the uniaxial compressive strain and crack opening displacement of specimens was verified by Dinh et al [38] and Yu et al [39] using strain gauges and displacement gauges, respectively. An objective of this test was to use DIC to monitor the development of cracks in concrete columns at different loading stages at mid-height and to extract data on the vertical displacement and mid-span deflection of the specimens and, in this way, compensate for possible errors in the contact measuring instruments.…”

Section: Introductionmentioning

confidence: 90%

Study on the Eccentric Compressive Performance of Steel Fibre Reinforced Coal Gangue Concrete Columns

et al. 2023

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Coal gangue is the waste created in the coal mining process and can be utilised as a coarse aggregate in construction projects to solve the environmental problems it causes. To study the mechanical properties of steel fibre reinforced coal gangue concrete (SFCGC) columns under eccentric compression, two natural aggregate concrete (NAC) columns and eight SFCGC columns were designed and fabricated for eccentric compression loading tests. The variables involved in the tests include gangue substitution rate (0%, 30%, 50%, 70%), steel fibre volume content (SFVC) (0%, 0.5%, 1%, 1.5%), and eccentricity (0.25, 0.5). The experimental work and theoretical analysis were used to investigate the failure mode, cracking, and ultimate bearing capacity of SFCGC columns. The effects of various variation parameters on the longitudinal strain, concrete strain, transverse displacement, crack width, and bearing capacity were analysed in detail. The digital image correlation (DIC) technique was used to compare with the conventional observation and to analyse the cracking trend of the specimens. The testing results revealed that the damage pattern of SFCGC columns under eccentric compression was similar to that of NAC columns. The eccentricity significantly affected the damage pattern (or bearing capacity) of SFCGC columns. The effect of the coal gangue replacement rate on the lateral displacement corresponding to the ultimate load can be neglected under the same eccentricity. The incorporation of steel fibres effectively inhibited the development of cracks in the columns, with an average increase in crack load and ultimate load of 7.36% and 17.1%. The equations were also established to determine the crack width and bearing capacity of the studied SFCGC columns, and the theoretical predictions agreed with the experimental results.

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Section: Introductionmentioning

confidence: 90%

Study on the Eccentric Compressive Performance of Steel Fibre Reinforced Coal Gangue Concrete Columns

et al. 2023

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“…As one of the non‐contact measurement methods, it is capable of obtaining all the real‐time deformations data, and independent of the number of measurement points, the surface condition of the specimen, or the installation conditions. Compared with displacement meters, strain gauges, and other contact deformation measurement approaches, it has the advantages of non‐contact measurement, high accuracy, no special requirements for the environment, and the ability to obtain deformation information of the specimen in any area and direction during the loading 27 . DIC has been applied in the research of concrete deformation 28,29 and crack propagation 30,31 for its unique advantages.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with displacement meters, strain gauges, and other contact deformation measurement approaches, it has the advantages of non-contact measurement, high accuracy, no special requirements for the environment, and the ability to obtain deformation information of the specimen in any area and direction during the loading. 27 DIC has been applied in the research of concrete deformation 28,29 and crack propagation 30,31 for its unique advantages.…”

Section: Introductionmentioning

confidence: 99%

Research on the bending damage of concrete in areas with large temperature differences based on 3D‐Digital Image Correlation

Shi

Zhao

Bai

et al. 2022

Structural Concrete

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Digital Image Correlation (DIC) technique is used to collect the whole-field strain of concrete subjected to bending loads under different temperature change cycles, cooling rates, and water-binder ratio. The bending damage behavior of concrete under large-difference temperature circulation is analyzed with the whole-field strain cloud map and data. In addition, with the wholefield strain obtained by 3D-DIC technology, the strain-based damage variable is defined. Furthermore, the damage degree of concrete specimen in the bending process is quantified, and the bending damage evolution process of concrete under the action of temperature circulation is discussed. The results show that the damage of concrete in areas with large temperature differences is related to the number of temperature change cycles as well as the cooling rate. Moreover, the increase in the number of temperature change cycles and the cooling rate will aggravate the bending damage of the concrete. Additionally, the higher the water-binder ratio, the more serious the adverse effect of temperature circulation on the concrete. This paper provide certain reference for the evaluation of concrete bending deformation damage in areas with a large temperature difference.

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“…This is a novel outcome, as traditionally, it has been challenging to get this data in similar testing conditions, mainly because strain gauges do not work at elevated temperatures, and because the DIC has been rarely used in beams exposed to fire. As has been reported by other authors who have used DIC in fire conditions, the objective, in this case the side of the beam, cannot be seen when the beam is being burnt (Ba Le, Tran, Dao, & Torero, 2017;Quiquero & Gales, 2016). The heat and smoke do not allow capturing the movement and displacement in the specimen.…”

Section: Strain Profilesmentioning

confidence: 78%

Fire analysis of load-bearing bamboo structures

González¹

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The remarkable high strength-to-weight ratio of bamboo and the recent innovations and development of laminated bamboo products has enabled the potential for new larger and taller structural bamboo applications. However, there is little understanding of the behaviour and performance of bamboo structures during and after a fire. To date, bamboo has been used widely in low-rise constructions I am infinitely grateful with my amazing friends from the coffee, and beer club, Angela, Aaron, Juan Patricio, Ian, Luis, Sergio, Jaime, Andrea, Abed. I would not have completed this journey without your support and positive energy. They became like my family in Brisbane, and when I had to push uphill, they were always there to struggle with me, to motivate me, to make me grow, and make me laugh in the happiest and most difficult moments. My love and respect go to the UQ Fire family for their support, enlightening conversations, and diligent work.

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Deformation capturing of concrete structures at elevated temperatures

Cited by 11 publications

References 14 publications

Study on the Eccentric Compressive Performance of Steel Fibre Reinforced Coal Gangue Concrete Columns

Study on the Eccentric Compressive Performance of Steel Fibre Reinforced Coal Gangue Concrete Columns

Research on the bending damage of concrete in areas with large temperature differences based on 3D‐Digital Image Correlation

Fire analysis of load-bearing bamboo structures

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