Civil Engineering Reference
In-Depth Information
Table 8.6
Stress comparison of curved steel box girder
Bending stress in kip/in
2
(MPa)
Location
Shell model (ANSYS)
Beam model (ANSYS)
Top DL stress at 4th pt
−9.124 (62.91)
−13.693 (−94.41)
Bottom DL stress at 4th pt
5.73 (39.51)
9.926 (68.44)
Top DL stress at 10th pt
25.68 (177.06)
27.616 (190.41)
Bottom DL stress at 10th pt
−17.96 (−123.83)
−20.018 (−138.02)
Figure 8.22
Estero Parkway Bridge constructed as a three-span continuous bridge.
of the Estero Parkway Bridge. Calculation of the box section properties
(at midspan location) in three stages, noncomposite (
N
= ininity), long-
term composite (
N
= 3
n
), and short-term composite (
N
=
n
) sections, are
shown in Figure 8.25. Equivalent thickness of top lateral-bracing plate
t
eq
is calculated using Equation 8.5. The steel section during construction is
considered a quasiclosed section enclosed by top lateral bracing, webs,
and the bottom flange, whereas the composite box sections for long-term
and short-term consideration are enclosed by the top slab and the steel
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