Calculation of the seismic stress state of the ground-gallery system

The article considers the definitions of the state of the avalanche-proof gallery under seismic influence. The analysis of the effectiveness of the gallery calculation method for seismic loads is made and stresses in the cross section of the gallery of the filling soil are determined. The analysis of the difference between dynamic load and static load is made. The equation of dynamic equilibria by the finite element method is performed. The methods of solution are used, by the method of decomposition according to the forms of natural oscillations and by the method of direct integration. The direct integration method has many varieties: the method of central differences, Habolt, Wilson and Newmark. The Newmark method is more effective. The greatest displacements and deformations in the filling soil are considered.