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Study On Flexural Behavior Of Reinforced Concrete Beams: Response To Fire And Sudden Cooling

Submitted2019-03-14
Last Update2019-03-14
TitleStudy On Flexural Behavior Of Reinforced Concrete Beams: Response To Fire And Sudden Cooling
Author(s)Author #1
Author title:
Name: P. Bhuvaneshwari
Org: Assistant Professor, School of Civil Engineering, SASTRA University, Thanjavur, India
Country:
Email: bhuvaneswari@civil.sastra.edu

Author #2
Author title:
Name: Asiq Raja
Org: Graduate Students, School of Civil Engineering, SASTRA University, Thanjavur, India
Country:
Email:

Author #3
Author title:
Name: N. Athithya
Org: Graduate Students, School of Civil Engineering, SASTRA University, Thanjavur, India
Country:
Email:

Other Author(s)
Contact AuthorAuthor #1
Alt Email: bhuvaneswari@civil.sastra.edu
Telephone:
KeywordsReinforced concrete beams, ISO:834, Sudden cooling, Retrofitting, GFPPECC, Parametric analysis.
AbstractThe objective of the present study was to retrofit RC beams under realistic fire followed by sudden cooling. Three reinforced concrete beams (100 mm x 150 mm x 1500 mm) were cast using M30 grade concrete. After the curing period, they were exposed to ISO: 834 standard fire curve. Three temperatures (300�C, 500�C and 900�C) were applied and maintained for a specific duration. Then, the beams were cooled immediately. The beams were repaired for cracks and spalled concrete using a polymer mortar and then cured. The beams were wrapped using glass fiber sheets and PP fiber-based ECC binders. Cured beams were subjected to two-point loading for flexure. Results showed that strengthening improved the ductility and toughness values for rise in temperature. The ultimate load for the beams increased up to 500�C and the stiffness value decreased for temperatures higher than 300�C. For all strengthened beams, the composites were intact even at failure load.
Paperview paper 4641.pdf (312KB)

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