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Re: Calculations of Base Shear
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 Subject: Re: Calculations of Base Shear
 From: "Alper Ucak" <alper(nospamat)sahalac.com>
 Date: Mon, 24 Feb 2003 13:43:00 0500
For calculating the base shear you have to
use the total weight of the structure (the weight is independent of the
direction of the earthquake force). Meaning, you have to include the weight of
the parallel and perpendicular structural elements. After that using the stiffness in each direction you will calculate the
mass participation ratios (which may require a eigen value
analysis) in each earthquake direction. Your total base shear will be
a function of the total weight and modal participation ratio. i.e. although
the weight that participates in the EQ load is
dependent on the EQ direction(do not confuse that statement with the first
statement), you have to use the total weight in your equations, and
the modal participation factor will show, how much of the total weight
participates in that direction.
Have a nice day,
Alper Ucak

 References:
 Calculations of Base Shear
 From: Jenkins Engineering, Inc.
 Calculations of Base Shear
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