1. Strength analysis – how much load can the structure support before global failure occurs.
2. Stability analysis – finding critical points (limit points and bifurcation points) closest to the operational range.
3. Service configuration analysis – finding the ‘operational’ equilibrium configuration of certain slender structures when the fabrication and service configurations are quite different (e.g. cable and inflatable structures).
4. Reserve strength analysis – finding the load-carrying capacity beyond critical points to assess safety under abnormal conditions.
5. Progressive failure analysis – a combined strength and stability analysis in which progressive deterioration (e.g. cracking) is considered.
6. Establish the causes of a structural failure.
7. Safety and serviceability assessment of existing infrastructure whose integrity may be in doubt due to:
- Visible damage (cracking, etc)
- Special loadings not envisaged at the design state
- Health–monitoring
- Concern over corrosion or general aging.
• A shift towards high-performance materials and more efficient utilization of structural components.
• Direct use of NonlinearFEA in design for both ultimate load and serviceability limit states.