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RE: Dynamic Analysis

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I recommend "The seismic design handbook" by Farzad Naeim, Ph.D, S.E. It will help you understand everything from ground motion to response spectra and dynamic response of structure. It also has chapters on practical seismic design of steel and concrete structures (wood and masonry too) with samples and so much more on seismic design.
If you have a software that you are already able to use for static analysis, you should do so to design the structure before starting the dynamic analysis. After finishing the dynamic analysis and adjusting the base shear, you would be able to check the results against the ones from static analysis. You can't do this without a software for a decent size building. If you want to know more you can always read the documents supporting the software of your choice which explain the theory behind the software. Even more you can start with a book on Matrix Analysis of Structures. Forming a stiffness matrix for a member in local axis and transferring it to the global axis, storing half-band of the global stiffness matrix and inverting it with something like a modified Cholesky (spelling?) method and ...sounds like fun!
Reza Dashti P.Eng
Vancouver, BC

To: seaint(--nospam--at)
Subject: Re: Dynamic Analysis
From: TBerair(--nospam--at)
Date: Wed, 22 Nov 2006 08:46:15 +0100

It depends how deep you want to go. There are many publication that could help you, the best of course is "Dynamics of Structures" Clough and Penzien. But I think the best way to learn this is to enroll in graduate class, which should give you a solid base.

Good luck

Tel: +33-(0)1-40-90-11-13
Email: tberair(--nospam--at)

"Will Haynes" <gtg740p(--nospam--at)> 22/11/2006 00:23
Please respond to seaint
        To:        seaint <seaint(--nospam--at)>
        Subject:        Dynamic Analysis

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?  

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