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Limitations of Non-Linear Static Analysis

There are many unsolved issues that need to be addressed through more research and development. Examples of the important issues that need to be investigated are:

  1. Incorporation of torsional effects (due to mass, stiffness and strength irregularities).

  2. 3-D problems (orthogonality effects, direction of loading, semi-rigid diaphragms, etc)

  3. Use of site specific spectra.

  4. Cumulative damage issues.

  5. Most importantly, the consideration of higher mode effects once a local mechanism has formed.


Since the pushover analysis is approximate in nature and is based on static loading, as such it cannot represent dynamic phenomena with a large degree of accuracy. It may not detect some important deformation modes that occur in a structure subjected to severe earthquakes, and it may significantly from predictions based on invariant or adaptive static load patterns, particularly if higher mode effects become important.
 

Conclusion & References
 

 



Introduction to Non-Linear Static Push-over Analysis

What is Non-Linear Static Push-over Analysis?

Purpose of Push-over Analysis

Target Displacement

Non-Linear Static Analysis for Buildings

Case Study of Non-Linear Static Analysis using SAP2000

Limitations of Non-Linear Static Push-over Analysis

Conclusion & References