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Computers and Concrete Volume 31, Number 3, March 2023 , pages 197-206 DOI: https://doi.org/10.12989/cac.2023.31.3.197 |
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Bending performance and calculation of reinforced beam with hybrid fiber and CaCO3 whisker |
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Li Li, Yapeng Qin, Mingli Cao, Junfeng Guan and Chaopeng Xie
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| Abstract | ||
| 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. | ||
| Key Words | ||
| bending performance; calcium carbonate whisker; calculation of bearing capacity; polyvinyl alcohol fiber; reinforced beam; steel fiber | ||
| Address | ||
| Li Li: 1) College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China, 2) Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China Mingli Cao: School of Civil Engineering, Dalian University of Technology, Dalian, Liaoning, 116000, China Junfeng Guan and Chaopeng Xie: School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China | ||