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The fracture properties of CA-UHPC were experimentally studied through three-point bending tests with prefabricated cracks under 5 groups of different coarse aggregate contents, and the fracture properties of CA-UHPC were numerically simulated by Extended Finite Element Method(XFEM). The test results show that the peak flexural load and fracture energy of CA-UHPC are improved when the coarse aggregate content is less than 400 kg/m3, while further increasing the coarse aggregate content will weaken the fracture properties of CA-UHPC. XFEM fits the fracture properties of CA-UHPC well, and the load-mid-span displacement curve obtained is consistent with the test curve, and the error of the result does not exceed 10%.

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Experimental Study and Numerical Simulation of CA-UHPC Fracture Performance

  • 会议论文

  • 发表日期：

    2025年

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  • Yilin Liu,
  • Wenbin Zhao,
  • Fan Wu

摘要

The fracture properties of CA-UHPC were experimentally studied through three-point bending tests with prefabricated cracks under 5 groups of different coarse aggregate contents, and the fracture properties of CA-UHPC were numerically simulated by Extended Finite Element Method(XFEM). The test results show that the peak flexural load and fracture energy of CA-UHPC are improved when the coarse aggregate content is less than 400 kg/m3, while further increasing the coarse aggregate content will weaken the fracture properties of CA-UHPC. XFEM fits the fracture properties of CA-UHPC well, and the load-mid-span displacement curve obtained is consistent with the test curve, and the error of the result does not exceed 10%.