An earthquake doesn't hit a building in a vacuum; it travels through soil.
You’ll likely define Alpha (mass-proportional) and Beta (stiffness-proportional) damping constants.
In Explicit analysis, use mass scaling cautiously. Increasing the mass to speed up the simulation can artificially increase inertial forces, ruining your earthquake data. abaqus earthquake analysis
Import your accelerogram data (Time vs. Acceleration) as an Amplitude.
In earthquake engineering, energy dissipation is everything. An earthquake doesn't hit a building in a
Use these at the boundaries of your soil domain to prevent artificial wave reflections.
Don't just request stress. Request Hysteresis loops (Force vs. Displacement) to check how much energy your structure is absorbing through plastic deformation. 4. Why Abaqus? Increasing the mass to speed up the simulation
For structures expected to stay within the elastic range, a modal approach is efficient.
Use the *BOUNDARY, TYPE=ACCELERATION command to apply that amplitude to the constrained nodes at the foundation. Step 2: Modeling Soil-Structure Interaction (SSI)
Taking the damaged state of a building and running a thermal analysis immediately after.