Steel and Composite Structures

  • 제12권3호
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  • Pages.207-230
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  • 2012
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Low velocity impact behavior of concrete beam strengthened with CFRP strip

  • 투고 : 2010.10.14
  • 심사 : 2011.12.01
  • 발행 : 2012.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Nowadays CFRP (Carbon Fiber Reinforced Polymer) became widely used materials for the strengthening and retrofitting of structures. Many experimental and analytical studies are encountered at literature about strengthening beams by using this kind of materials against static loads and cyclic loads such as earthquake or wind loading for investigating their behavior. But authors did not found any study about strengthening of RC beams by using CFRP against low velocity impact and investigating their behavior. For these reasons an experimental study is conducted on totally ten strengthened RC beams. Impact loading is applied on to specimens by using an impact loading system that is designed by authors. Investigated parameters were concrete compression strength and drop height. Two different sets of specimens with different concrete compression strength tested under the impact loading that are applied by dropping constant weight hammer from five different heights. The acceleration arises from the impact loading is measured against time. The change of velocity, displacement and energy are calculated for all specimens. The failure modes of the specimens with normal and high concrete compression strength are observed under the loading of constant weight impact hammer that are dropped from different heights. Impact behaviors of beams are positively affected from the strengthening with CFRP. Measured accelerations, the number of drops up to failure and dissipated energy are increased. Finite element analysis that are made by using ABAQUS software is used for the simulation of experiments, and model gave compatible results with experiments.

키워드

참고문헌

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  13. Low-Velocity Impact Load Testing of RC Beams Strengthened in Flexure with Bonded FRP Sheets vol.24, pp.5, 2012, https://doi.org/10.1061/(asce)cc.1943-5614.0001048
  14. Investigation of impact behavior of reinforced concrete beam to column connection strengthened with carbon fiber‐reinforced polymer strips vol.22, pp.4, 2021, https://doi.org/10.1002/suco.202000571
  15. Experimental investigation on low-velocity impact behavior of CFRP wraps in presence of concrete substrate vol.301, pp.None, 2012, https://doi.org/10.1016/j.conbuildmat.2021.124103