Use these at the boundaries of your soil domain to prevent artificial wave reflections.

When you need to account for , cracking in concrete, or large deformations, *DYNAMIC (Implicit) is the way to go. It is stable for large time steps.

Using truss elements embedded in solid concrete.

Abaqus offers several ways to approach seismic loading. Your choice depends on the complexity of the structure and the level of precision required. A. Modal Dynamic Analysis (Linear)

Sophisticated modeling of lead-rubber bearings.

You’ll likely define Alpha (mass-proportional) and Beta (stiffness-proportional) damping constants.

For reinforced concrete structures, use the CDP model. It allows you to define different tension and compression recovery factors, capturing the "stiffness degradation" that occurs during cyclic loading.