Dynamic Stability of Dams Against Deep Slide by Strength Reduction Method

Abstract eng:
In this paper ,the commercial finite element software ADINA is used to analyze dynamic stability of dams. Based on the analysis of action mechanism about the dam foundation under earthquake load，a new numerical method of dynamic stability against deep slide is proposed. The shear strength of the sliding surface is divided by different strength reduction factor and the numerical seismic analysis is carried out after the accomplishment of the static analysis. Under the different shear strength reduction factor, the curve about the earthquake total displacement of the key point and strength reduction factor is focused, according to the curve mutation, the distribution of plastic zone in the foundation and the non-convergence of the finite element calculation. The dynamic stability safety factor is finally defined as the strength reduction factor of shear strength when the gravity dam is in the critical stability state under earthquake load. As an application example of the above concepts，the dynamic stability safety for a gravity dam in a hydropower project is evaluated. The analysis of the example shows that the proposed method is feasible and it provides a valuable way for dynamic stability safety evaluation

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket