yes: the walls will take load as their rigidity but when the stresses in the walls reinforcement reach mor than
the yielding point the walls will crack in the plastic phase, and will loose their rigidty then the frames will
intervene and take the entire base shear because the frames already design to resist the entire shear.
Dr.hamida
----- Original Message -----From: Thor TandySent: Thursday, January 10, 2008 11:56 AMSubject: RE: Dual - System ( frame+wall)?... surely the stiffer element will take the load up before the frame deforms enough to carry loads ...? Or is this suggesting that the base shear of a dual system is greater for frames than for shear walls ...?
Thor A. Tandy P.Eng, MIStructE, Struct Eng
Victoria, BC
Canada
vicpeng@telus.net-----Original Message-----
From: y.hamida [mailto:y.hamida@scs-net.org]
Sent: Thursday, January 10, 2008 11:36 AM
To: seaint@seaint.org
Subject: Dual - System ( frame+wall)Dual - SystemA - code sayes if you have shear walls and ordinary frames ( beams+columns )to resist earthquake
You can neglect the ordinary frames and resist the entire base shear by shear walls
and designe the ordinary frames just for axial loads..
B - M y (ph.d) research sayes;
if you have moment resisting frames and walls( reinforce concrete or masonary )to resist earthquake You can neglect the walls and resist the entire base shearby moment resisting frames and the walls design just for axial loadsand minimum reinforcement for concrete walls and conect the masonary walls tothe floor by dowels .
Dr .hamida