Flexural Behavior of BFRP Bar–Recycled Tire Steel Fiber-Reinforced Concrete Beams
Author Information
Author(s): Fu Jing-Hua, Zhang Ao, Chen Kai-Feng, Li Bao-Yuan, Wu Wei, Balázsi Csaba
Primary Institution: National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan, China
Hypothesis
Investigating the flexural properties of concrete beams reinforced with BFRP bars and recycled tire steel fibers.
Conclusion
The study found that incorporating recycled tire steel fibers significantly enhances the flexural performance of concrete beams reinforced with BFRP bars.
Supporting Evidence
- The addition of recycled tire steel fibers improved the cracking load of concrete beams by up to 42.94%.
- The ultimate bearing capacity of beams increased by 13.21% with the incorporation of recycled tire steel fibers.
- Using 3D-DIC technology allowed for detailed analysis of crack propagation in the beams.
- Mechanical properties tests showed that BFRP-RTSF beams had better performance than ordinary BFRP beams.
- The study proposed a modified calculation model for predicting the bearing capacity of BFRP-RTSF beams.
- Results indicated that increasing the volume of recycled tire steel fibers had a more significant impact on flexural performance than increasing the BFRP reinforcement ratio.
- Flexural failure modes included concrete crushing and BFRP reinforcement tensile rupture.
- Overall, the incorporation of recycled tire steel fibers enhances the sustainability and cost-effectiveness of concrete structures.
Takeaway
Using recycled tire steel fibers in concrete beams makes them stronger and helps prevent cracks.
Methodology
Six concrete beams were constructed with varying amounts of recycled tire steel fibers and BFRP reinforcement ratios, and tested for flexural characteristics using 3D-DIC technology.
Limitations
The study may not account for all variables affecting the performance of BFRP-RTSF beams in different environmental conditions.
Digital Object Identifier (DOI)
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