|
As
|
=
|
area
or reinforcement.
|
|
b
|
=
|
column
width dimension.
|
|
bo
|
=
|
perimeter
of critical shear section for footing.
|
|
B
|
=
|
footing
width dimension.
|
|
d
|
=
|
distance
from extreme compression fiber to centroid of tension reinforcement.
|
|
db
|
=
|
nominal
diameter of bar.
|
|
f’c
|
=
|
specified
compressive strength of concrete.
|
|
fy
|
=
|
specified
tensile strength of reinforcement.
|
|
h
|
=
|
overall
member thickness.
|
|
l
|
=
|
column
length dimension.
|
|
lava
|
=
|
available
length for bar development.
|
|
ld
|
=
|
development
length of bar in tension.
|
|
ls
|
=
|
compression
lap splice length.
|
|
ldb
|
=
|
basic
development length of bar in compression.
|
|
L
|
=
|
footing
length dimension.
|
|
Po
|
=
|
axial
load, service.
|
|
Pu
|
=
|
axial
load, ultimate.
|
|
qact
|
=
|
actual
soil pressure based on service loads condition.
|
|
qall
|
=
|
allowable
soil bearing pressure.
|
|
qs
|
=
|
factored
actual soil pressure.
|
|
Ru
|
=
|
coefficient
of resistance.
|
|
Vu
|
=
|
factored
shear force at section considered.
|
|
Vc
|
=
|
nominal
shear strength of concrete.
|
|
bc
|
=
|
ratio
of long side to short side of column dimensions.
|
|
r
|
=
|
ratio
of tension reinforcement.
|
|
rb
|
=
|
ratio
of tension reinforcement at balanced strain condition.
|
|
rmax
|
=
|
maximum
ratio permissible by code.
|
|
rmin
|
=
|
minimum
ratio permissible by code.
|
|
rreq’d
|
=
|
required
ratio of tension reinforcement.
|
|
rprov’d
|
=
|
provided
ratio of tension reinforcement.
|
|
f
|
=
|
strength
reduction factor.
|
