Loading...

Effect of utilizing glass fiber-reinforced polymer on exural strengthening of rc arches

Moradi, H ; Sharif University of Technology | 2019

871 Viewed
  1. Type of Document: Article
  2. DOI: 10.24200/sci.2019.21512
  3. Publisher: Sharif University of Technology , 2019
  4. Abstract:
  5. An experimental study of the. flexural behavior of Reinforced-Concrete (RC) arches strengthened with Glass Fiber-Reinforced Polymer (GFRP) layers was performed. A total of 36 specimens including 3 un-strengthenod (control) and 33 strengthened RC arches were tested under centrally concentrated point load. The variables of this study were steel reinforcement ratio, number of GFRP layers, and location and arrangement of GFRP layers. Failure mode, load-displacement response of specimens, crack propagation patterns, and GFRP debonding were examined. The extrados strengthening method was shown to Ix1 more effective than the intrados strengthening one in improving the failure load and rigidity of the arches. However, applying excessive GFRP layers to the extrados conld change the failure mode of arches from flexnral to shear. The dominant failure mode of specimens was flexnral and ductile due to the formation of five-hinge mechanism. Generally, GFRP strengthening conld enhance the ultimate load carrying capacity, secant stiffness, and energy absorption capacity of arch specimens by up to about 154, 300, and 93 percent, respectively. Statistical analyses were performed to assess the level of influence of each considered parameter on the behavior of RC arches. Finally, analytical approach satisfactorily predicted the experimental data for arches with five-hinge failure mechanism. © 2019 Sharif University of Technology. All rights reserved
  6. Keywords:
  7. Five-hinge mechanism ; Flexural strengthening ; Glass fiber-reinforced polymer ; Reinforced concrete arch ; Statistical analysis ; Arches ; Failure (mechanical) ; Failure modes ; Fiber reinforced plastics ; Glass fibers ; Load limits ; Polymers ; Statistical methods ; Strengthening (metal) ; Energy absorption capacity ; Glass fiber reinforced polymer ; Hinge mechanisms ; Load-displacement response ; Steel reinforcements ; Strengthening methods ; Ultimate load-carrying capacity ; Reinforced concrete ; Arch ; Crack propagation ; Experimental study ; Failure mechanism ; Glass ; Polymer ; Reinforcement ; Rigidity
  8. Source: Scientia Iranica ; Volume 26, Issue 4A , 2019 , Pages 2299-2309 ; 10263098 (ISSN)
  9. URL: http://scientiairanica.sharif.edu/article_21512.html