关键词: 拱坝抗震, 整体安全度, 最大可信地震, 高拱坝, 锦屏水电站

Abstract: National energy industry standard, NB35047-2015, was released on September 1, 2015. The anti-seismic safety of Jinping I arch dam was reviewed based on this new code and the main check works includes: study on site design response spectrum based on the determined earthquake scenario; stress and dam abutment dynamic stability analysis under design earthquake and maximum credible earthquake by using arch-cantilever method, linear elastic FEM and nonlinear FEM; based on the selected artificial earthquake wave, and by proportionally amplifying the peak ground acceleration on the basis of design earthquake, the overload capacity analysis of dam-foundation system under excess design earthquake. The check result shows that the arch dam of Jinping I Hydropower Station has high anti-seismic capability. Under the design and maximum credible earthquakes, the compressive strength meets the current code requirement with a larger security margin. The tensile stress is generally under the concrete control value except that of some stress concentrated area comparatively. The dam will not collapse under the check earthquake level.

Key words: anti-seismic of arch dam, integral safety, maximum credible earthquake, high arch dam, Jinping Hydropower Station