4.6 Article

Experimental Study and Finite Element Analysis on the Flexural Behavior of Steel Fiber Reinforced Recycled Aggregate Concrete Beams

期刊

MATERIALS
卷 15, 期 22, 页码 -

出版社

MDPI
DOI: 10.3390/ma15228210

关键词

steel fiber reinforced recycled aggregate concrete; flexural behavior; crack development; finite element analysis

资金

  1. National Natural Science Foundation of China [51909244]
  2. Science and Technology Project of Henan province [222102320014]
  3. Graduate Education Reform and Development Research Project [2022YJSJG33]
  4. Opening Funds of Henan Engineering Laboratory [1009/65030039]

向作者/读者索取更多资源

This study investigates the flexural behavior of steel fiber reinforced-recycled aggregate concrete beams through experimental and finite element analysis, analyzing parameters such as steel fiber volume fraction, recycled aggregate replacement ratio, and concrete strength. The results show that the flexural bearing capacity of the beams increases with higher steel fiber volume fraction and concrete strength, and lower recycled aggregate replacement ratio. A new model for calculating the flexural bearing capacity is proposed and compared with finite element analysis results.
This paper reports on the flexural behavior of nine steel fiber reinforced-recycled aggregate concrete (SFRAC) beams through combined experimental and finite element analysis. The test parameters in this study include the steel fiber volume fraction, recycled aggregate replacement ratio, and concrete strength. The failure modes, crack development, load-deflection curves, and flexural bearing capacity of SFRAC beams are investigated in detail. The test results indicated that cracks and concrete crushing are formed in the compression zone of all specimens. The flexural bearing capacity of SFRAC beams increases with the increase of steel fiber volume fraction and concrete strength and the decrease of recycled aggregate replacement ratio. In addition, the results are compared with those of the finite element analysis. Based on the uniaxial compressive constitutive model of SFRAC, a new model for calculating the flexural bearing capacity of SFRAC beams is proposed. The prediction and test results are compared to evaluate the accuracy of the developed formula. The studies may provide a considerable reference for designing this type of structure in engineering practice.

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