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Re: CQC and SRSS

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>So, CQC does 
>not always *guarantee* better results.  Those interested can refer to 
>the book "Response Spectrum Methods" by Dr. Ajaya K. Gupta of North
>Carolina State University,
Gupta's book also has good sections on coupled systems (like bridge 
cranes in buildings) and a good explanation of the UBC seismic 
coefficient method. The arithmetic can me tough sledding--if you want a 
sensationally good starter book for structural dynamics, get _Structural 
Dynamics for the Practising Engineer_ by H. M. Irvine. There's plenty of 
math, but Irvine emphasizes insight when he does the math. The clarity is 
right up there with Timoshenko.

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