Study on bonded slip of reinforced concrete based on extended finite element

In this paper, for the tensile test of reinforced concrete specimens, the numerical simulation model is established to simulate the whole process of concrete specimen from crack generation and extension to final fracture based on the extended finite element method. Based on the numerical simulation results and the tensile test results of concrete specimens, the differences of the numerical simulation results with the bond slip relationship and those without the bond slip relationship are analysed. The results show that the numerical analysis results of bearing ratio of steel bar with bond slip relationship are close to those of the test, and its numerical analysis results of crack width are also closer to the measured values of the test. And there is great deviation between the numerical analysis results without bond slip relationship and the test results, at the same time, the feasibility of solving the continuous - discontinuous problem based on extended finite element method is verified. (paper)