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RE: Calculations of Base Shear
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Calculations of Base Shear
- From: "Berair, Tarik" <tarik.berair(--nospam--at)shawgrp.com>
- Date: Mon, 24 Feb 2003 12:54:57 -0500
the weight of structure (or mass, to be precise) generates inertia forces, when
accelerated by an earthquake (or any other dynamic load), the whole mass on a
certain level has to be considered (that includes all non-structural elements
and sometimes part of the live load).
this do help you.
R. Berair, PE
I have managed to get myself
confused as I attempt to determine the weight of the structure for base shear
When determining the weight of
a structure for base shear, I understand that the weight for the floor or roof
system along with the tributary weight of the walls is "lumped" at each
When making this calculation,
is the direction of the earthquake force considered? That is, do I
include the weight of vertical elements parallel to the direction of the
earthquake force considered? I have seen discussion elsewhere that
indicated wall weight parallel to the EQ force was not included in the base
shear calculation and I have seen examples where the total values were
determined without regard to force direction - that is - the earthquake force
was the same in each direction of the structural system.
Thanks in advance!
Bobby Jenkins, PE
PO Box 2101
218 S Thomas St Suite 209
(662) 840.1233 vocal
(662) 840.1103 fax