Abstract:The vibration frequency of reinforced earth retaining wall reflects its seismic performance. Based on ABAQUS, a finite element model for calculating the frequency of reinforced earth retaining wall is established, and the first three frequencies of the structure system under five working conditions are calculated. It is found that the elastic modulus of soil behind the wall has obvious influence on the vibration characteristics of the structure system. The grey correlation analysis method is introduced to analyze the correlation between the elastic modulus, Poisson"s ratio and the vibration frequency of the reinforced retaining wall. The sensitivity factors of the vibration characteristics of the reinforced retaining wall are obtained. The results show that the vibration characteristics of reinforced retaining wall are most sensitive to the change of elastic modulus of soil, followed by the internal friction angle, which is less sensitive to Poisson"s ratio, gravity and cohesion of soil; the elastic modulus of soil is linear to the vibration frequency, while the internal friction angle is quadratic to the vibration frequency, and the frequency change is most sensitive when the internal friction angle is 32 °; two sensitive factors The trend of influence on the third-order vibration is the same, that is, increase first, then decrease, and then increase. The influence of Poisson"s ratio, the gravity of fill and cohesion on the vibration frequency is irregular.