Search

In this paper, the vibration characteristics of gravity retaining wall slope are studied. Using the M language of MATLAB, the finite element calculation program is compiled to calculate the frequency and characteristic values of the structure, and the first three modes of the structure are drawn. By analyzing and calculating the different parameters of soil behind the wall, the influence of different elastic moduli of soil and Poisson’s ratio on the vibration characteristics of the slope is studied, and the conclusion is further verified by an elastic time history analysis. The results show that the change of soil elastic modulus has an obvious effect on the vibration characteristics of the structural system, while the change of Poisson’s ratio has no obvious effect on the vibration characteristics of the structural system.

Natural frequency is one of the important indicators that reflect the dynamic performance of the structure. On the basis of comprehensive consideration of the continuity of the deformation of the filling behind the reinforced retaining wall, if the filling behind the wall is regarded as the Pasternak two-parameter foundation model, then the retaining wall panels can be considered as Bernoulli–Euler beams. Considering the force characteristics of the panel, the calculation of the shear modulus of the panel and the foundation reaction force of the filling soil behind the wall is reasonably considered. On this basis, the natural frequency calculation model of the reinforced retaining wall interacting with the concrete faceplate and the backfill of the wall is established, and the natural frequency calculation equation of the reinforced retaining wall is derived through the wall–soil dynamic balance equation. The complex modal analysis method is used to obtain the analytical solution of the natural frequency of the reinforced retaining wall, and the comparative analysis with the existing method proves the validity of the calculation result; then, the method is used to analyze the frequency influence factors of the reinforced retaining wall.