Civil Engineering Reference
In-Depth Information
rules are provided for several different types of structural members, such as solid one-way
slabs, one-way concrete joists, two-way slabs, and so forth.
PROBLEMS
Qualitative Influence Lines
In Problems
14.1
to
14.3
, draw qualitative influence lines for the functions indicated in the structures shown.
14.1
Reactions at
A
and
B
, positive moment and positive shear at
X
.
X
A
B
C
D
14.2
Reaction at
B
and
D
and negative moment and negative shear at
X
.
X
A
B
C
D
14.3
Positive moment at
X
, positive shear at
X
, negative moment just to the left of
Y
.
Moment Envelopes
14.4
For the continuous beam shown and for a service dead load of 2 k/ft and a service live load of 3 k/ft, draw the mo-
ment envelope using factored loads, assuming a permissible 10% up or down redistribution of the maximum negative
moment. Use ACI coefficients.
