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Re: 70%-30% Bracing Load Distribution

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Structures are also unaware of the requirements of the code and all the formulas and other results (for what they are worth) of scientific research.  My understanding is that the initial response will be at 50-50, then the compressed brace will buckle (if designed for less than that), and the tension brace will have to take 100% (if it can).
I saw something like that at a large industrial building in Glendale after the 1994 Northridge earthquake. 
----- Original Message -----
Sent: Tuesday, April 26, 2005 10:23 AM
Subject: Re: 70%-30% Bracing Load Distribution

Be careful of arbitrary assignments of loads.  Remember that the structure doesn't know what you assumed. It will behave according to the laws of Nature based on stiffness and load capacity.  Your assumptions should account for the important factors.
Bill Cain, SE
Berkeley CA