Expert/source verification requiredEdition-dependent or normative details must be confirmed against the adopted standard and National Annex before project use.
Mass modellingStiffness assumptionsAccidental eccentricityTorsional effectsP-Delta effects
Learning objectives
In this lesson
- Every model parameter needs physical meaning.
- Check modes and reactions before design interpretation.
Engineering explanation
A model should capture relevant load paths, inertia distribution, stiffness, diaphragm behaviour, supports and interaction. Complexity without verified inputs can conceal uncertainty. Cracking, non-structural participation, support flexibility and mass sources affect periods and force distribution. Accidental eccentricity and second-order effects must follow applicable provisions. Before using results, audit total mass, reactions, periods, mode shapes, participating mass and sensitivity to influential assumptions.
Key takeaways
What to carry forward
- Every model parameter needs physical meaning.
- Check modes and reactions before design interpretation.
- Use sensitivity studies for uncertain assumptions.