Civil Engineering Reference
In-Depth Information
Cantilever span
Anchor span
Suspended span
A
B
C
D
F
E
L
a
L
c
L
s
Reaction at A
Reaction at B
Moment at E
Moment at F
Shear at E
Shear at F
FIGURE 5.16
Influence lines for reactions, bending moments, and shear forces in anchor
and cantilever spans with loads applied directly to the superstructure.
span may be constructed by considering effects of unit loads placed at locations A,
B, and C as shown qualitatively
∗
in Figure 5.16.
5.2.1.2.4.2 Cantilever Bridge Span Influence Lines [with Loads Applied
to the Superstructure by Transverse Members (Floorbeams)]
Influence
lines for shear force and bending moment in the anchor span panel point
A1-A2andinthecantileverspanpanelpointC2-C3canbeconstructedbyconsidering
∗
Qualitative influence lines are useful in both manual and electronic calculations of maximum or
minimum effects to determine the approximate location of live load.
