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Effect of heated areas on thermal response and structural behavior of reinforced concrete walls exposed to fire

Title
Effect of heated areas on thermal response and structural behavior of reinforced concrete walls exposed to fire
Authors
Ryu, EunmiKim, HeesunChun, YeonjuYeo, InhwanShin, Yeongsoo
Ewha Authors
신영수김희선
SCOPUS Author ID
신영수scopus; 김희선scopus
Issue Date
2020
Journal Title
ENGINEERING STRUCTURES
ISSN
0141-0296JCR Link

1873-7323JCR Link
Citation
ENGINEERING STRUCTURES vol. 207
Keywords
Reinforced concrete wallsFireTemperatureResidual strengthExperimental studyFinite element analysisMoisture clogHeated areaConcrete strength
Publisher
ELSEVIER SCI LTD
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The purpose of this study was to investigate variations in the thermal and structural behavior of reinforced concrete (RC) walls according to the fire exposure time, compressive strength of the concrete, and the heated area. To this end, fire and axial loading tests were performed to obtain the temperature distributions and residual strengths. Heat was applied to the walls according to the ISO 834 standard time-temperature curve for 1 or 2 h. The fire test results demonstrated significant dependence of the heat propagation through the wall along the thickness on the moisture clog formed during heating. In order to show the effect of moisture clog on the heat propagation, heat transfer analyses were performed, and the results of temperature distributions obtained from the finite element (FE) model including the moisture clog zone were in good agreement with experimental results. The axial loading test results also indicated that the structural behaviors of the fire-damaged walls were affected by the fire exposure time, concrete strength, and heated area. In particular, the wall heated only on the front surface showed eccentricity, which reduced the residual strength considerably. Numerical studies for the structural behaviors of the fire damaged concrete walls were also conducted considering the eccentric loading effect due to fire. As results from the validation, the proposed simplified modeling approach was able to predict the asymmetric behaviors of fire damaged concrete walls owing to fire damage.
DOI
10.1016/j.engstruct.2020.110165
Appears in Collections:
엘텍공과대학 > 건축도시시스템공학전공 > Journal papers
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