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Re: Dynamic Analysis

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I picked it up under the supervision of two other senior engineers.  The basic concepts are relatively easy.  CSIBerkely has a some great white papers on their website.  If you have never done this before, I strongly suggest your read them.  You can find them at

My two cents for dynamic are the same as for static analysis.  Garbage in, garbage out.  In addition to needing a realistic stiffness model (similar to a static analysis) you also need a realistic mass model.  The few times I have done dynamic models, I started with a static model.  Get that model working then work towards the dynamic model.  The final dynamic results should be confirmed with static results for a gut check.

Best of luck,
Jake Watson, P.E.
Salt Lake City, UT

On 11/21/06, Will Haynes <gtg740p(--nospam--at)> wrote:
How many of you have done a dynamic analysis due to earthquakes?  Did you pick up doing this on your own or did you take a dynamics class? I have not ever had to do structural dynamics but I know it can be very difficult and I am just wondering if it is something you can pick up on your own if you are required to do it. I figure that most people are using software (SAP etc.) to do the majority of the work but I would like to be able to do it all by hand if I had to. Do you think that most engineers that doing earthquake dynamics really know what they are doing or are they just relying on the computer?