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RE: Finite Element Modeling

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>Then, i typically place an out of plane spring
>at each joint with the spring stiffness based on the coeffiecient of
>subgrade reaction and the allowable settlement.
I forgot this--some FEA software has an option for elastic support to 
plate and beam elements. I've used the option in COSMOS/M to reflect 
passive soil pressure for flexible buried tanks, but it's a pretty crude 
way to model something like soil. 

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw(--nospam--at)skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/~chrisw



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