Structural Engineering and Mechanics

  • 제42권6호
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  • Pages.799-813
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  • 2012
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Flexural performance of fire damaged and rehabilitated two span reinforced concrete slabs and beams

  • Yu, Jiang-Tao (Research Institute of Engineering & Disaster Reduction, Tongji University) ;
  • Liu, Yuan (Research Institute of Engineering & Disaster Reduction, Tongji University) ;
  • Lu, Zhou-Dao (Research Institute of Engineering & Disaster Reduction, Tongji University) ;
  • Xiang, Kai (Tianjin Fire Research Institution of the Ministry of Public Security)
  • 투고 : 2011.05.24
  • 심사 : 2012.05.01
  • 발행 : 2012.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

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피인용 문헌

  1. Out-of-Plane Behavior of Two Reinforced Concrete Bearing Walls under Fire: Full-Scale Experimental Investigation vol.111, pp.5, 2014, https://doi.org/10.14359/51686814
  2. Strength Analysis of Reinforced Concrete Beams Affected by Fire Using Glass Fiber Sheet and PP Fiber ECC as Binders vol.41, pp.1, 2017, https://doi.org/10.1007/s40996-016-0029-9
  3. Assessment of damages on a RC building after a big fire vol.6, pp.2, 2012, https://doi.org/10.12989/acc.2018.6.2.177
  4. Thermal Bowing of Reinforced Concrete Elements Exposed to Non-Uniform Heating vol.64, pp.4, 2012, https://doi.org/10.2478/ace-2018-0055
  5. Strengthening of Fire-Damaged Reinforced Concrete Short Columns Using GFPPECC Composites vol.45, pp.10, 2012, https://doi.org/10.1007/s13369-020-04795-x
  6. Behavior and flexural strength of fire-damaged high-strength reinforced rectangular concrete beams with tension or compression zones exposed to fire repaired with CFRP sheets vol.15, pp.None, 2021, https://doi.org/10.1016/j.cscm.2021.e00779