Diaphragms With Vertical Offsets - The Analysis of Irregular Shaped Structures - page 242

F i g u r e 7.10 Diaphragm delection.

This shear wall deflection equation also applies to the clerestory walls and to the
transfer shear walls along grid lines A and B. The deflections of the walls along grid lines
A and B are not equal due to the number and size of the walls along those lines. The rota-
tion along grid line 3 is determined by proportional triangles, as shown in Fig. 7.10.

∆
∆+∆

() b

SW 2

L = length of uppertriangula rrsection

1

SW 2 SW 3 − 4

∆= ∆
rot

( L

SW 2

1

deflection duetorotation

L

∆

= shearwalldeflectionplusrotation of supportingbeams

SW 56 −

vL
G

()

max

0 375 . Le totaldeflectionatgrid line3

∆= + + ∆+∆+∆

max 3

2

n rot SWSW 1 56 −

t

The deflection along grid line 3 must include the effects of chord slip along the upper
and lower boundary members at the vertical offset.