Page 26 - Design of Reinforced Masonry Structures

NOTATION xxv

V . = shear strength provided by masonry, lb (N)
m
V n = nominal shear strength, lb (N)
V nm = nominal shear strength provided by masonry, lb (N)
V ns = nominal shear strength provided by shear reinforcement, lb (N)
V u = factored shear force, lb (N)
W = wind load or related internal forces and moments
w strut = horizontal projection of the width of the diagonal strut, in. (mm)
w u = out-of-plane distributed load, lb/in. (N/mm)
a = tension reinforcement strain factor
b = 0.25 for fully grouted masonry or 0.15 for other than fully grouted masonry
b b = ratio of area of reinforcement cut off to total area of tension reinforcement at a
section
g = reinforcement size factor
∆ = calculated story drift, in. (mm)
∆ a = allowable story drift, in. (mm)
d = moment magnification factor
d ne = displacements computed using code prescribed seismic forces and assuming
elastic behavior
d s = horizontal deflection at midheight under service loads, in. (mm)
d u = deflection due to factored loads, in. (mm)
e cs = drying shrinkage of AAC
e mu = maximum usable compressive strain of masonry
e s = strain in steel reinforcement
e y = yield strain in steel reinforcement
m AAC = coefficient of friction of AAC
f = strength reduction factor
r = reinforcement ratio
r b = reinforcement ratio producing balanced strain conditions
r max = maximum flexural reinforcement ratio