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A new quantitative method of assessing fire damage to concrete structures

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A new quantitative method of assessing fire damage to concrete structures. / Nassif, A. Y.; Burley, E.; Rigden, S.

In: Magazine of Concrete Research, Vol. 47, No. 172, 01.01.1995, p. 271-278.

Research output: Contribution to journalArticlepeer-review

Harvard

Nassif, AY, Burley, E & Rigden, S 1995, 'A new quantitative method of assessing fire damage to concrete structures', Magazine of Concrete Research, vol. 47, no. 172, pp. 271-278. https://doi.org/10.1680/macr.1995.47.172.271

APA

Vancouver

Author

Nassif, A. Y. ; Burley, E. ; Rigden, S. / A new quantitative method of assessing fire damage to concrete structures. In: Magazine of Concrete Research. 1995 ; Vol. 47, No. 172. pp. 271-278.

Bibtex

@article{73eee1c0cb5b40c98241208aab3ac018,
title = "A new quantitative method of assessing fire damage to concrete structures",
abstract = "This paper describes a laboratory investigation into the adoption of the stiffness damage test to assess fire-damaged concrete structures. Laboratory-prepared concrete cores (75 mm diameter, 175 mm long) were fired under different heating regimes and their uniaxial compression stress-strain response at low stress level was determined. The area of hysteresis of the load-unload loops and other characteristics of the response such as the degree of concavity, the loading chord modulus, the unloading modulus and the residual plastic strain provide a quantitative measure of the extent of structural damage caused by thermal exposure. Fire-damaged specimens were also monitored by measuring the ultrasonic pulse velocity. The microstructure of the damaged specimens was studied using scanning electron microscopy (SEM) and X-ray diffraction. 320°C marked the onset of significant modification in the characteristics of the stress-strain response loops, with a sudden increase in the damage index (area of hysteresis loops). The ultrasonic pulse velocity in the fired concrete showed similar variation with temperature to that of the elastic properties. At temperatures higher than 320°C, SEM photographs showed significant cracks in the cement paste, especially in the interfacial zone.",
author = "Nassif, {A. Y.} and E. Burley and S. Rigden",
year = "1995",
month = jan,
day = "1",
doi = "10.1680/macr.1995.47.172.271",
language = "English",
volume = "47",
pages = "271--278",
journal = " Magazine of Concrete Research",
issn = "0024-9831",
publisher = "ICE Publishing Ltd.",
number = "172",

}

RIS

TY - JOUR

T1 - A new quantitative method of assessing fire damage to concrete structures

AU - Nassif, A. Y.

AU - Burley, E.

AU - Rigden, S.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - This paper describes a laboratory investigation into the adoption of the stiffness damage test to assess fire-damaged concrete structures. Laboratory-prepared concrete cores (75 mm diameter, 175 mm long) were fired under different heating regimes and their uniaxial compression stress-strain response at low stress level was determined. The area of hysteresis of the load-unload loops and other characteristics of the response such as the degree of concavity, the loading chord modulus, the unloading modulus and the residual plastic strain provide a quantitative measure of the extent of structural damage caused by thermal exposure. Fire-damaged specimens were also monitored by measuring the ultrasonic pulse velocity. The microstructure of the damaged specimens was studied using scanning electron microscopy (SEM) and X-ray diffraction. 320°C marked the onset of significant modification in the characteristics of the stress-strain response loops, with a sudden increase in the damage index (area of hysteresis loops). The ultrasonic pulse velocity in the fired concrete showed similar variation with temperature to that of the elastic properties. At temperatures higher than 320°C, SEM photographs showed significant cracks in the cement paste, especially in the interfacial zone.

AB - This paper describes a laboratory investigation into the adoption of the stiffness damage test to assess fire-damaged concrete structures. Laboratory-prepared concrete cores (75 mm diameter, 175 mm long) were fired under different heating regimes and their uniaxial compression stress-strain response at low stress level was determined. The area of hysteresis of the load-unload loops and other characteristics of the response such as the degree of concavity, the loading chord modulus, the unloading modulus and the residual plastic strain provide a quantitative measure of the extent of structural damage caused by thermal exposure. Fire-damaged specimens were also monitored by measuring the ultrasonic pulse velocity. The microstructure of the damaged specimens was studied using scanning electron microscopy (SEM) and X-ray diffraction. 320°C marked the onset of significant modification in the characteristics of the stress-strain response loops, with a sudden increase in the damage index (area of hysteresis loops). The ultrasonic pulse velocity in the fired concrete showed similar variation with temperature to that of the elastic properties. At temperatures higher than 320°C, SEM photographs showed significant cracks in the cement paste, especially in the interfacial zone.

UR - http://www.scopus.com/inward/record.url?scp=0029370907&partnerID=8YFLogxK

U2 - 10.1680/macr.1995.47.172.271

DO - 10.1680/macr.1995.47.172.271

M3 - Article

AN - SCOPUS:0029370907

VL - 47

SP - 271

EP - 278

JO - Magazine of Concrete Research

JF - Magazine of Concrete Research

SN - 0024-9831

IS - 172

ER -

ID: 11292746