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- To: seaint(--nospam--at)seaint.org
- Subject: Re: pca-frame
- From: LibertyEng(--nospam--at)aol.com
- Date: Wed, 24 Mar 1999 07:37:53 EST
In a message dated 3/22/99 13:58:44 Eastern Standard Time, peter.p.devere1(--nospam--at)jsc.nasa.gov writes: > Jan: > > Could you share that information with us? > > > Peter De Vere > JSC > Houston, Texas For Peter and others who are wondering what could possibly have slipped by the author, the checkers, the editor, the publisher, the critics, etc., in Bleich's classic text "Buckling Strength of Metal Structures," I can report that I just finished a phone call with Dr. Razzaq who pulled his copy off the shelf and said, "Oh, yes." He is in agreement that engineers can't use any references (or software) blindly but must use some judgment in their application. And yes, he does assign things like this just to demonstrate the point. Anyway for those in need of some specifics: a) In Article 36 the derivation lacks some important torsional terms. b) Page 101 Eqn 1-76 one of the negative terms on the LHS should be positive. c) Page 97 Eq's 1-60: last term in the second equation uses an Sx' that should be Sz' (or vice versa, my phone conversation notes aren't clear. Please be sure to check these things yourself, rather than relying on something you "heard on the net"). He could have gone on. It's virtually a hobby of his to find such typos and errors. He told us a story that when he was a graduate student, his advisor (Dr. Galambos) used to give him a nickel for every error he found in "Structural Members and Frames." Presumably, a nickel was worth more than 1/11 of a Snickers bar back then. Jan Harris, PE Liberty Engineering, PC Virginia Beach, VA
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