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Mixed mode fracture in reinforced concrete with low volume fraction of steel fibers

Kazemi, M. T ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. Publisher: Materials and Energy Research Center , 2011
  3. Abstract:
  4. An investigation into the mixed mode fracture of steel fiber reinforced concrete (SFRC) beams with one percent volume fraction of steel fiber is presented. A series of notched beams with different notch depths and locations are tested under three-point bending. The test results for apparent fracture toughness, crack trajectories, and fracture energy are presented. The crack paths for SFRC and plain concrete beams are compared. The apparent fracture toughness values were more scattered for SFRC than for plain concrete. The load-deflection curves were used to obtain the fracture energy. To this end, two methods were utilized for center notched beams, and the results were comparable to each other. It is observed that fracture energy is a more reliable material property than apparent fracture toughness, and its scatter is less
  5. Keywords:
  6. Stress intensity factor ; Concrete beams and girders ; Concrete buildings ; Cracks ; Fibers ; Fracture ; Fracture energy ; Reinforced concrete ; Reinforced plastics ; Titration ; Trajectories ; Crack paths ; Crack trajectory ; Fracture toughness values ; Load-deflection curve ; Material property ; Mixed mode ; Mixed mode fracture ; Notch depth ; Notched beam ; Plain concrete ; Steel fiber reinforced concretes ; Steel fibers ; Test results ; Three point bending ; Fracture toughness
  7. Source: International Journal of Engineering, Transactions B: Applications ; Volume 24, Issue 1 , February , 2011 , Pages 1-18 ; 1728-144X (ISSN)
  8. URL: http://www.ije.ir/abstract/%7BVolume:24-Transactions:B-Number:1%7D/=1058