Civil Engineering Reference
In-Depth Information
Figure 16.5
Critical sections for
shear.
panels than
d
/2 at any point. When shearhead reinforcing is provided with reinforcing
bar
s
or steel I or channel shapes, the maximum shear strength can be increased to
at a distance
d
/2 from the column. According to the Code (11
.1
2.4.8), this is
only permissible if the maximum computed shear does not exceed
c
b
o
d
7
f
c
b
o
d
4
f
along the
dashed critical section for shear shown in Figure 16.5(b).
In Section 16.12 the subject of shear stresses is continued with a consideration of the
transfer of moments and shears between slabs and columns. The maximum load that a
two-way slab can support is often controlled by this transfer strength.
16.6
DEPTH LIMITATIONS AND STIFFNESS REQUIREMENTS
It is obviously very important to keep the various panels of a two-way slab relatively
level (that is, with reasonably small deflections). Thin reinforced two-way slabs have
