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Flexural behaviour of ECC and ECC–concrete composite beams reinforced with hybrid FRP and steel bars
- Source :
- Advances in Structural Engineering. 24:3171-3183
- Publication Year :
- 2021
- Publisher :
- SAGE Publications, 2021.
-
Abstract
- Owing to the good ductility of steel and high strength and excellent corrosion resistance of fibre-reinforced polymer (FRP), concrete beams reinforced with hybrid steel and FRP bars exhibit better ductility than FRP-reinforced concrete beams as well as higher load-carrying capacities and better corrosion resistance than steel-reinforced concrete beams. However, the inherent brittleness of concrete in tension results in steel corrosion because of wide cracks and accelerated fracture of FRP reinforcement because of crack-induced stress concentration. This study investigated the effects of ultra-high ductile engineered cementitious composites (ECCs) on the flexural behaviour of hybrid steel and FRP-reinforced beams. Six hybrid-reinforced beams with various reinforcement ratios, matrix types and ECC pouring positions were tested in four-point bending. The flexural behaviours of the beams in terms of failure modes, crack patterns and developments, load versus deformation relationships and ductility are discussed herein in detail. We observed that substituting ECC with concrete results in a higher load-carrying capacity and better ductility of the hybrid reinforced beams owing to the excellent characteristics of ECC materials. When a layer of ECC is poured in the tension zone, the average crack width and crack spacing along the beam decrease; therefore, the longitudinal reinforcements can be adequately protected.
- Subjects :
- Concrete beams
Materials science
business.industry
Engineered cementitious composite
0211 other engineering and technologies
020101 civil engineering
02 engineering and technology
Building and Construction
Structural engineering
engineering.material
Fibre-reinforced plastic
Composite beams
0201 civil engineering
Corrosion
Flexural strength
021105 building & construction
engineering
business
Ductility
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 20484011 and 13694332
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- Advances in Structural Engineering
- Accession number :
- edsair.doi...........4fbaaad77e3b50c0fb5b3cd278449192