Computers and Concrete

  • 제31권3호
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  • Pages.197-206
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  • 2023
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Bending performance and calculation of reinforced beam with hybrid fiber and CaCO3 whisker

  • Li Li (College of Water Resources and Architectural Engineering, Northwest A&F University) ;
  • Yapeng Qin (College of Water Resources and Architectural Engineering, Northwest A&F University) ;
  • Mingli Cao (School of Civil Engineering, Dalian University of Technology) ;
  • Junfeng Guan (School of Civil Engineering and Communication, North China University of Water Resources and Electric Power) ;
  • Chaopeng Xie (School of Civil Engineering and Communication, North China University of Water Resources and Electric Power)
  • 투고 : 2021.09.22
  • 심사 : 2022.12.02
  • 발행 : 2023.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, the bending performance of a MSFRHPC (containing steel fiber, polyvinyl alcohol (PVA) fiber, and CW)-reinforced beam was studied for the first time. Introducing a multiscale fiber system increased the first crack load (up to 150%), yield load (up to 50%), and peak load (up to 15%) of reinforced beams. The multiscale fiber system delays cracking of the reinforced beam, reduces crack width of the reinforced beam in normal use, and improves the durability of the beam. Considering yield load and peak load, the reinforcing effect of multiscale fiber on the high-reinforcement ratio beam (1.00%) is better than that on the low-reinforcement ratio beam (0.57%). Introducing fibers slowed the development of cracks in the reinforced beam under bending. With the added hybrid fiber, the deformation concentration of reinforced beams after yield was more significant with concentration in 1 or 2 cracks. A model for predicting the flexural capacity of MSFRHPC-reinforced beams was proposed, considering the action of multiscale hybrid fibers. This research is helpful for structure application of MSFRHPC-containing CW.

키워드

과제정보

The authors acknowledge the support of Natural Science Foundation of China under Grant No. 52109168, No. 51678111, No. 51779095, Natural Science Basic Research Plan in Shaanxi Province of China (2021JM-108), and the Science Technology Innovation Talents in Universities of Henan Province (20HASTIT013).

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