Civil Engineering Reference
In-Depth Information
CHAPTER
4
Design Examples of Steel
and Steel-Concrete Composite
Bridges
4.1 GENERAL REMARKS
The previous
Chapters 1-3
highlighted the main issues regarding the general
background, layout, classification, literature review, nonlinear material
behavior of the bridge components, shear connection behavior, applied
loads, and stability and design of steel and steel-concrete composite bridges.
Therefore, it is now possible in this chapter to present detailed design exam-
ples for the bridges. The design examples were carefully chosen to cover rail-
way and highway bridges, plate girder steel bridges, truss steel bridges, and
steel-concrete composite bridges. The presented examples cover the design
of the bridge components comprising stringers (longitudinal floor beams),
cross girders (lateral floor girders), main girders, connections, bracing mem-
bers, stiffeners, splices, and bearings. The design examples are calculated, as
an example, based on the design rules specified in EC3 [1.27, 2.11], which
were previously highlighted in
Chapter 3
. The examples addressed in this
chapter represent hand calculations performed by the author. Overall, the
design examples detail how the cross sections are initially assumed, how
the straining actions are calculated, and how the stresses are checked and
assessed against the design rules. One of the designed bridges presented in
this chapter will be modeled using the finite element method in
Chapter 6
, which is credited to this topic. Once again, the main objective
of this topic is to introduce a complete piece of work regarding both the
design and finite modeling of the bridges.
This chapter starts with a brief introduction of the presented design
examples for steel and steel-concrete composite bridges. After that, the
chapter details five detailed design examples for the bridges. The first design
example presented is for a double-track open-timber floor plate girder deck
railway steel bridge; the second, for a through truss highway steel bridge; the
third, for a highway steel-concrete composite bridge; the fourth, for a
double-track open-timber floor plate girder pony railway steel bridge;
finally, the fifth, for a deck truss highway steel bridge. The author hopes that
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