Based on the theory of contact force, 3-D frictional contact non-linear dynamic contact model was put forward. It got across to search contact face, and ensure contact state. In succession, it asked for contact force under satisfying contact condition and dynamic balance condition. With the earthquake loading, the model simulates opening, closing and sliding of arch dam with contraction joints.
Stability analysis of surrounding rock mass of Hongping underground caverns are studied by means of numerical simulation using Fast Lagrangian explicit finite difference method. The process of excavation and support are simulated. The pattern of deformation, stress state, and the distribution of plastic areas are analyzed. Finally, the whole stability of surrounding rock mass of underground caverns was evaluated.
According to a intake tower of spillway tunnel established the intake tower structure—water—foundation 3-D finite element model for seismic analysis, by the response spectrum method in original design seismic parameters and new parameters of the project on horizontal and vertical dynamic response of the intake tower. The results shown that the structure of maximum dynamic stress concentration appeared near the junction of the tower with backfill concrete, where the weak parts of seismic, used the new seismic parameters calculated show greater damage on the tower, but couldn’t overturn, meet the seismic design requirements.
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