Finite element analysis of stress in the gallery of gravity dam on inclined bedrock based on ANSYS model

Taking a variety of galleries in a concrete gravity dam body as the research object, it analyzes the changing law of stress concentration phenomenon around the galleries in the dam body affected by the holes of the galleries. Use the large-scale finite element application software ANSYS to model the dam and the bedrock within a limited range, change the position of the gallery to obtain different solid models, and obtain the stress distribution map around the gallery after loading calculations. The results show that when the distance between the gallery and the upstream dam surface changes from 3.0 to 9.0m, the maximum principal stress of the gallery section gradually decreases and tends to remain unchanged; there is obvious stress concentration at the gallery and the dam heel. When the drainage gallery is arranged in the vertical direction, the change of the distance affects the stress distribution and state of the gallery. When the distance is changed from 15 to 25m, the stress changes from 0.106e7 to 0.088e7Pa, and tends to be stable, and the mutual influence gradually decreases. This provides guidance and suggestions for the design of the gravity dam gallery on the inclined bedrock.

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