Calculation of earth dam strain under seismic impacts

Abstract

The study is devoted to the dynamic problems of the deformed state of earth dams under seismic influences. A method for solving wave problems was developed to determine the stress-strain state of earth structures, in particular, earth dams. Using the method of finite differences, an algorithm for solving problems and calculation formulas was developed that have the 2nd order of accuracy in time and coordinates. The solution method, algorithm and compiled program are substantiated by comparing the results obtained with the results of similar problems obtained by the finite element method using the FLAC3D program. The advantage of the developed method is the implementation of complex nonlinear strain models, taking into account structural changes and moisture content of earth massive. Using the example of the Charvak dam, the stress state distribution over the cross section of the dam under its own weight was determined and, taking it as the initial conditions, the problem of the dynamic behavior of an earth dam under the action of seismic loads was numerically solved. The change in displacements in some points of the earth dam over time was determined and the results obtained by the finite difference method and FLAC3D were compared.