Conclusion & References
From the study of above
model example discussed following conclusions can be obtained:
There are good reasons for
advocating the use of the inelastic pushover analysis for demand prediction,
since in many cases it will provide much more relevant information that an
elastic static or even dynamic analysis, but it would be counterproductive
to advocate this method as a general solution technique for all cases;
The pushover analysis is a
useful, but not in fallible, tool for accessing inelastic strength and
deformation demands and for exposing design weaknesses.
Its foremost advantage is
that it encourages the design engineer to recognize important seismic
response quantities and to use sound judgment concerning the force and
deformation demands and capacities that control the seismic response close
to failure, but it needs to be recognized that in some cases it may be
provide a false feeling of security if its shortcomings and pitfalls are not
It must be emphasized that
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 may
occur in a structure subjected to severe earthquakes, and it may exaggerate
others. Inelastic dynamic response may differ significantly from predictions
based on invariant or adaptive static load patterns, particularly if higher
mode effects become important.
Thus performance of
pushover analysis primarily depends upon choice of material models included
in the study.
journal, Vol. 20,1998 :- Pros and cons of a pushover analysis of seismic
performance evaluation by Helmut Krawinkler and G.D.P.K. Seneviratna.
Workshop on Retrofitting
of Structures(2003),IIT ROORKEE :- Non-Linear static analysis for seismic
evaluation and retrofit of RC buildings by Shailesh Agarwal and Ajay
CSI Reference Manual on
SAP 2000 software.
Design of Structures By Pankaj Agarwal and Manish Shrikhande.
Introduction to Non-Linear Static Push-over Analysis