Reinforced concrete is utilized in a range of construction projects to create strong structures capable of withstanding severe loading conditions. It is extensively used in nuclear reactor buildings to protect vital equipment of nuclear power plants against unexpected external threats. These include natural phenomena and accidental activities that could pose a threat to the integrity of protective structures and internal equipment. The objective of this research is to carry out impact tests to reinforced concrete structures under different impact conditions including oblique impact, to confirm the different impact behaviors of the reinforced concrete structure, to develop an analytical method by investigating the test results and analytical conditions, and to validate the analytical method through comparison with the test results. We set up a numerical model and intend to compare the numerical results with the obtained test results related to damage zone, reaction force and deformation of impactor to validate the numerical model. This study focuses on the effect of different concrete constitutive models on the numerical estimation of damage behavior in the reinforced concrete structure subjected to oblique projectile impact. In this paper, we compare the local damage on the cross section of the reinforced concrete structure after the impact tests with the damage results of numerical analyses using several concrete models in a finite element analytical method. The findings obtained from the comparison are presented and discussed in detail.