Investigation of Dynamic Behavior of Concrete Slabs Reinforced with GFRP Bars and Prestressed Concrete Slabs under Impact Loading

Sadraie, Hamid | 2019

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 52088 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khaloo, Alireza
  7. Abstract:
  8. Prestressed and reinforced concrete slabs are common structural elements that could be exposed to impact loading. Although, use of reinforced concrete slabs and utilization of Fiber Reinforced Polymer (FRP) as alternative to traditional steel reinforcement slabs are growing, but the influence of various parameters on their response under impact loads is not properly evaluated. In addition, studies on steel reinforced concrete slabs have been found in literature, but investigation of prestressed slabs and GFRP reinforced concrete slabs under impact load is limited. This study investigated the effect of rebar’s material, amount and arrangement of reinforcements, concrete strength and slab thickness on the dynamic behavior of reinforced concrete slabs on 20 concrete slabs inder impact loading using both laboratory experiments and numerical simulations. Failure mode, crack development, displacement-time, strain-time, as well as acceleration-time responses were studied and compared between various slabs. Finite element analyses and simulations of specimens were conducted using LS-DYNA explicit software. The results obtained from experiments and numerical models are in good agreement, and they indicate that increasing the reinforcement ratio or the slab thickness enhance the behavior of RC slabs under impact loads. By adjusting the amount and arrangement of GFRP, better performance in GFRP slabs than steel reinforced slabs can be achieved, which considering the corrosion resistance of this material, can make it an appropriate selection of reinforcement material. Furthermore, the prestressed concrete slabs with 10 percent prestessing level and had better performance than reinforced concrete slabs with due to enhancement in slab stiffness
  9. Keywords:
  10. Impact Behavior ; Glass Fiber Reinforced Plastics ; Impact ; Prestressed Concrete Slabs ; Concrete Resistance ; Finite Element Analysis ; Damage Mechanism

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