Scholarlink

<p>This paper provides a comprehensive investigation of the factors affecting the shear strength of steel fiber-reinforced concrete beams without shear reinforcement through an integrated experimental and numerical approach. The geometric and material properties of the numerical model were based on the experimentally tested model. The experimental model was numerically simulated using the ABAQUS program for finite element analysis. After achieving agreement between the numerical and experimental results in terms of ultimate load, deflection, and failure mode, using the finite element software ABAQUS/Standard thirty-two models of reinforced concrete beams with different configurations were proposed to study the combined effect of multiple variables on shear strength, including compressive strength, cross-sectional beam area, beam depth, compression zone reinforcement, flexural reinforcement diameter, and shear span ratio. The results of the numerical analysis of concrete specimens revealed a direct relationship between compressive strength and ultimate strength. Higher strength grades generally diminish this effect. The results indicated that the beam with a T-section shape had a higher strength compared to the rectangular cross-section, and this strength increased with increasing flange depth. Furthermore, increasing the beam depth and the compression reinforcement ratio also improved the shear strength. A slight increase in shear strength was achieved by increasing the number of bars and decreasing the diameter of the flexural reinforcement while maintaining a constant ratio of (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{A}_{s}{f}_{y})\)</EquationSource> </InlineEquation>. However, the results were opposite for the shear span ratio, as the ultimate bearing strength of the specimens decreased with increasing shear span ratio (<i>a</i>/<i>d</i>). The numerical study also proved the efficiency of steel fibers in improving the behavior of concrete beams and their ability to withstand loads. These results provide useful insights for the design of beams without shear reinforcement, especially when considering sustainable alternatives such as the use of steel fibers and some parameters that increase the strength of concrete beams.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental and numerical study on the shear behavior of fiber-reinforced concrete beams without shear reinforcement

  • 期刊论文

  • 发表日期：

    2026年5月11日

查看全文
  • Huda S. Merdas,
  • Muhaned A. Shallal,
  • Abdullah H. Al-Rekabi

摘要

This paper provides a comprehensive investigation of the factors affecting the shear strength of steel fiber-reinforced concrete beams without shear reinforcement through an integrated experimental and numerical approach. The geometric and material properties of the numerical model were based on the experimentally tested model. The experimental model was numerically simulated using the ABAQUS program for finite element analysis. After achieving agreement between the numerical and experimental results in terms of ultimate load, deflection, and failure mode, using the finite element software ABAQUS/Standard thirty-two models of reinforced concrete beams with different configurations were proposed to study the combined effect of multiple variables on shear strength, including compressive strength, cross-sectional beam area, beam depth, compression zone reinforcement, flexural reinforcement diameter, and shear span ratio. The results of the numerical analysis of concrete specimens revealed a direct relationship between compressive strength and ultimate strength. Higher strength grades generally diminish this effect. The results indicated that the beam with a T-section shape had a higher strength compared to the rectangular cross-section, and this strength increased with increasing flange depth. Furthermore, increasing the beam depth and the compression reinforcement ratio also improved the shear strength. A slight increase in shear strength was achieved by increasing the number of bars and decreasing the diameter of the flexural reinforcement while maintaining a constant ratio of ( \(\:{A}_{s}{f}_{y})\) . However, the results were opposite for the shear span ratio, as the ultimate bearing strength of the specimens decreased with increasing shear span ratio (a/d). The numerical study also proved the efficiency of steel fibers in improving the behavior of concrete beams and their ability to withstand loads. These results provide useful insights for the design of beams without shear reinforcement, especially when considering sustainable alternatives such as the use of steel fibers and some parameters that increase the strength of concrete beams.