Seismic Analysis of Earth Dam

[yingying]

Hi All,

I am a new user of OpenSees and am currently writing a script to analysis the seismic response of a 2D earth dam on a foundation layer. The geometry for this is relatively simple and I have created the mesh for this (link to what the mesh looks like - https://ibb.co/eXUwKb).

I am applying the earthquake using the commands: accelSeries and pattern UniformExcitation. I have fixed the base of the foundation layer - I believe this is how the acceleration is applied to the model?

Unfortunately the output results I am getting do not make sense - for example, the magnitude of the output accelerations at the berm are a magnitude of 10 greater than the crest accelerations.

Understandably this is likely due to how the script is written, any pointers in the correct direction would be much appreciated.