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Re: dynamic analysis - pushover analysis? - information resources?

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Non-Linear Static Procedures (pushover) are used frequently for the seismic analysis and retrofit of existing buildings.  You can find all the information you need in FEMA 273, 274, 356, 440 and ATC 40.

Thomas Hunt, S.E.
ABS Consulting

refugio rochin <fugeeo(--nospam--at)>

06/10/2005 10:15 AM

Please respond to

dynamic analysis - pushover analysis? - information resources?

Chris Wright wrote:
"Two different things. The pushover analysis is non-linear quasi-static,
so the dynamic loading characteristics have to be fudged into the
applied loading. Ordinary linear dynamics doesn't apply to non-linear
behavior, except with some fudging on the spectra.

"You can do a dynamic pushover analysis using time-history methods, but
it's a huge pain in the ass and has a whole litany of approximations of
its own, not the least of which is getting a realistic but practicable
load set. You can generate a synthetic earthquake record from a
response spectrum, but it's not a very satisfactory process, and only a
statistical artifice."

I believe pushover analysis is recommended for performance based design.
I know that Caltrans uses such analyses (i.e. W-Frame) to work towards design.
Is there any further information, any resources on the origin of using pushover
analyses for design that someone can recommend?

Curious:  What other fields use such pushover analysis besides designing
of civil structures?

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