Educational content reviewedGeneral engineering principles; project application still requires the applicable official standards.
Purpose of seismic designLife safetyDamage limitationPerformance objectives
Learning objectives
In this lesson
- Seismic design coordinates strength, deformation and consequence.
- Life safety does not imply damage-free response.
Engineering explanation
Earthquake-resistant design coordinates hazard, structural configuration, analysis, resistance and detailing. Its purpose is controlled behaviour under defined seismic situations, not a promise of zero damage. Life-safety and damage-limitation objectives address different response levels and consequences. Seismic inertia forces arise from mass and dynamic response, so reversals, cyclic degradation, deformation capacity and load-path continuity become central. Project acceptance criteria must always be read in the exact adopted Eurocode edition and National Annex context.
Key takeaways
What to carry forward
- Seismic design coordinates strength, deformation and consequence.
- Life safety does not imply damage-free response.
- Edition and National Annex control project criteria.