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Re: Dynamic base shears, is it considered?

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> ....
> Does anyone consider this in any of their designs? if dynamic base shears is
> considered .....

The building codes do not accept an independent determination of base
shear using dynamic analysis because it can result in much lower base
shear than those prescribed by the codes (due to various assumptions that
one can made). This is undesirable, since the code values are already
MINIMUM VALUES for an acceptable level of public safety. Therefore the
results of modal analysis (dynamic analysis) should be scaled.