Page 448 - Design of Reinforced Masonry Structures

7.10 CHAPTER SEVEN

Metal lath or wire screen
over cores to support
mortar or grout fill
Control joint
rake out and caulk

Embedment
ends in cores
filled with grout

1-1/4" × 1/4" × 30" strap
anchors with 3" right angle
bends at each end, at 48" o.c.
max. vertically
Unbonded intersection

Shear
reinforcement
in horizontal
bond beams

Reinforcement
extends
through
intersection into
flanges
Bonded intersection

FIGURE 7.14 Reinforcement in bond beams at wall intersections [7.8].

7.4 RIGIDITY AND RELATIVE RIGIDITY OF A
SHEAR WALL

7.4.1 General Concept
The most important parameter that describes the resistance of a shear wall is its rigidity
(or stiffness). Analytically, rigidity of a shear wall is simply the force applied at one end of
the wall to cause a unit deflection in the plane of the wall at that end while the other end
is held fixed. When using standard English units, rigidity of a shear wall would usually be
expressed in terms of kips per inch. For example, a rigidity of 100 kips/in. would mean that
a force of 100 kips is required to cause the end of the wall (where the force is applied) to
deflect 1 in. in the plane of the wall while the other end is held fixed.