Compressive Strength of Self-Compacting Concrete during High-Temperature Exposure

Jin, Tao; Yuan, Yong; Taerwe, Luc

doi:10.1061/(asce)mt.1943-5533.0000102

Cited by 64 publications

(22 citation statements)

References 16 publications

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“…Regarding the residual strength of the concrete after fire exposure, studies on concrete material [16][17][18] and concrete members [19,20] have confirmed that the determination of properties in the unstressed condition during the heating and cooling phases is more conservative than in the stressed condition. Hence, the STCRC columns were heated in an unstressed condition within a specially built furnace for testing structural members.…”

Section: Test Setup and Proceduresmentioning

confidence: 99%

Post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes

Liu

Yang

Gardner

2016

Journal of Constructional Steel Research

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Abstract:The post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes, also known as circular steel tube confined reinforced concrete (STCRC) columns, is investigated in this paper. A total of 12 experiments were conducted on eccentrically loaded circular STCRC stub columns after exposure to the ISO 834 standard fire, including both the heating and cooling phases. The temperatures across the tested sections, the axial load versus lateral displacement responses and the strains in the steel tubes were all measured and discussed. A finite element (FE) model was developed using the program ABAQUS, and validated against the test results from the present study, as well as related studies. Parametric studies were then performed to identify the influences of key parameters on the residual capacity of the eccentrically loaded STCRC columns, including eccentricity ratio, heating time, cross-sectional diameter, slenderness ratio, material strengths, steel tube to concrete area ratio and reinforcement ratio. Finally, a simplified method was proposed for predicting the residual load-bearing capacity of the eccentrically loaded STCRC columns after fire exposure.

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Section: Test Setup and Proceduresmentioning

confidence: 99%

Post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes

Liu

Yang

Gardner

2016

Journal of Constructional Steel Research

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“…Before the tests, the ambient temperature was heating and 60 minutes' heating, respectively. The specimens were heated in an unstressed condition, which is considered to be more conservative than under load, when assessing the residual strength of concrete after fire exposure [18][19][20][21][22][23]. The top and bottom end plates were fully protected with ceramic fibre blankets for all specimens, including the stub columns used for measuring temperatures.…”

Section: Test Setup and Proceduresmentioning

confidence: 99%

Post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes

Yang

Liu

Gardner

2015

Thin-Walled Structures

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Abstract:The post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes is investigated experimentally and numerically in this paper. Experiments were performed firstly to explore the fundamental behaviour of steel tube confined reinforced concrete (STCRC) slender columns after exposure to the ISO-834 standard fire, including the cooling phase. Temperature distributions, load versus lateral displacement curves, strains in the steel tube and failure modes were obtained and discussed. Next, a 3D finite element model was developed with the program ABAQUS using a sequentially coupled thermal-stress analysis. After validation of the FE model, parametric studies were carried out to identify the influence of key parameters on the load-bearing capacity and buckling reduction factor of slender STCRC columns. The considered parameters were the heating time, cross-sectional dimension, slenderness ratio, material strength, steel tube to concrete area ratio and reinforcement ratio. Finally, a simplified design method was proposed for predicting load-bearing capacity of STCRC slender columns after exposure to standard fires. Yang, H., Liu, F., and Gardner, L. (2015). Post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes.

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“…Second, the slow rate of heating restricted obvious spalling. Third, the ITZs between fibers and surrounding fresh paste provided sufficient pathway for the vapor, contributing to mirror spalling behavior …”

Section: Resultsmentioning

confidence: 99%

Fiber‐reinforced lightweight self‐compacting concrete incorporating scoria aggregates at elevated temperatures

Aslani

Sun

Bromley

et al. 2019

Structural Concrete

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Self‐compacting concrete (SCC) has developed rapidly in modern concrete structures to accommodate the need of high deformability and considerable resistance to segregation. The lightweight aggregate called scoria is also utilized to manufacture lightweight self‐compacting concrete (LWSCC) to improve the strength‐to‐weight ratio with considerable cost beneficial. Meanwhile, the LWSCC employs fibers (polypropylene [PP] and steel) equipping different replacement ratios of traditional aggregates, the SCC will be invented to reveal balanced fresh property, spalling behavior, mechanical performance especially at elevated temperatures. In this study, eight LWSCC mix designs were explored with varying fiber ratios by volume of PP fiber (0.1, 0.15, 0.20, and 0.25%) and steel fiber (0.25, 0.5, 0.75, and 1.0%). The effects of different fiber types and ratios are tested with fresh properties (slump flow and J‐ring), hardened mechanical performance (compressive and tensile strength at 20°C) and high temperature resistance (compressive and tensile strength, mass loss and spalling) after 28‐day curing at 100, 300, 600, and 900°C. The 0.25% optimum fiber ratio for PP fiber mix and 0.75% for steel fiber mix are determined with balanced fresh properties as well as high‐temperature resistance for the hardened properties.

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Compressive Strength of Self-Compacting Concrete during High-Temperature Exposure

Cited by 64 publications

References 16 publications

Post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes

Post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes

Post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes

Fiber‐reinforced lightweight self‐compacting concrete incorporating scoria aggregates at elevated temperatures

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