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ravail

Resistance available for blast load, psi
ru

Ultimate unit resistance, psi

Static test load, psi
_
ru

Mean static test load, psi
Ru

Total ultimate resistance, lb or lb/in
s

Spacing between stirrups, in
tm

Time to maximum deflection, ms
T

Duration of blast load, ms

Thickness of masonry wall
TN

Natural period of vibration, ms
vc

Concrete shear capacity, psi
vu

Ultimate shear stress, psi
Vd

Direct shear force, lb
Vu

Total applied design shear at db/2 from the support lb/in
w

Unit weight, lb/in3
Xc

Lateral deflection to which masonry wall develops no
resistance
XDL

Dead load deflection, in
XE

Equivalent elastic deflection, in
XLL

Live load deflection, in
Xm

Maximum deflection, in
X1

Deflection at maximum ultimate resistance of masonry wall
yt

Distance from top of the section to centroid of section
[alpha]

Angle between inclined stirrups and longitudinal axis of
member
[gamma]p

Factor for type of prestressing tendon
[sigma]

One standard deviation
[theta]max

Maximum support rotation, degrees
[phi]

Strength reduction factor
[mu]max

Maximum ductility ratio
[nu]

Poisson's ratio
2.08268


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