Abaqus Earthquake Analysis ~upd~

| Pitfall | Consequence | Solution | | :--- | :--- | :--- | | No baseline correction | Drifting displacement unrealistic | Pre-process accelerograms in MATLAB/Python to remove mean and trend. | | Insufficient damping | Unbounded response amplification | Use modal analysis to determine natural frequencies, then set Rayleigh damping for critical modes (f1 and 3f1). | | Large time increment (Implicit) | Convergence fails at reversal points | Use Automatic stabilization with dissipated energy fraction < 0.0001. | | No gravity initialization | Pounding elements interpenetrate | Run a Static, General step first, then import results as initial state. | | Incorrect units | Erroneous forces | Maintain consistent units (e.g., N, mm, s, tonne). |

Overview