# RE: Dome Analysis

• To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
• Subject: RE: Dome Analysis
• Date: Thu, 15 Mar 2001 13:33:44 -0600
Title: RE: Dome Analysis

If you don't already have it, you may want to track down a copy of "Thin Shell Concrete Structures" by David P. Billington, published by McGraw-Hill, 1990, 1982.  It was the text that we used in my thin shells class in school.  When we bought our copies at that time (1997), it was a "McGraw-Hill Classic Textbook Reissue", so I'm not sure if you could purchase a new copy from McGraw-Hill, or if you would have to find it through a used book store or something.  It has closed-form solutions (brush off your calculus skills) for, among other things, elliptical domes.  You could do as we did in class, and develop spreadsheets using the equations in the book to design your structure (probably not very practical in the "real world"), or you could use the book to do a few spot checks of the results from your computer model, whatever program you end up using (always a very good idea in the "real world").

Billington does a fairly decent job of boiling down the complicated calculus into something that's useful in practice.  But for those who really want to understand where the equations for the various forces come from, there are plenty of fourth-order partial differential equations to keep you busy for hours.

Have fun!

-------------------------
Halff Associates, Inc.
-------------------------

-----Original Message-----
From: Nels Roselund [mailto:n.roselund(--nospam--at)worldnet.att.net]
Sent: Thursday, March 15, 2001 12:01 PM
To: seaint(--nospam--at)seaint.org
Subject: Dome Analysis

I need to model, analyze and design a reinforced concrete ellipsoid dome
that will support an existing unreinforced stone masonry roof over a
rectangular space.

What windows-compatible 3d structural analysis program would you recommend,
and why?

Nels Roselund
Structural Engineer

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