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Flexural performance of fire damaged and rehabilitated two span reinforced concrete slabs and beams
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  • Flexural performance of fire damaged and rehabilitated two span reinforced concrete slabs and beams
  • Flexural performance of fire damaged and rehabilitated two span reinforced concrete slabs and beams
저자명
Yu. Jiang-Tao,Liu. Yuan,Lu. Zhou-Dao,Xiang. Kai
간행물명
Structural engineering and mechanics : An international journal
권/호정보
2012년|42권 6호|pp.799-813 (15 pages)
발행정보
테크노프레스
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Five two-span reinforced concrete (RC) slabs and seven two-span RC beams were tested under the ISO 834 standard fire with different durations. CFRP strengthening was then applied to some of the specimens after the damaged concrete was removed from the specimens and replaced with polymer mortar. All the specimens were loaded to failure to investigate the influence of fire-damage and the effectiveness of strengthening methods. Test results indicated that the flexural capacities of specimens decrease with the fire duration increases. Moreover, fire exposure had more significant effect on the flexural rigidity than on the bearing capacity of the specimens. After rehabilitation, the bearing capacities of specimens reached or even exceeded that of the reference RC specimen, and the strengthening methods seemed to have limited effect on flexural rigidity recovery. From the analysis of moment redistribution of tested beams, elevated temperature is found having different impacts on sagging moment region and hogging moment region. The damage of RC continuous member is definitely a comprehensive response of different regions.