TYPES OF BRIDGES
SUSENSION BRIDGE TRUSS BRIDGE
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Types of Bridges: Suspension and Truss Bridges, Slides of Communication
An in-depth analysis of two types of bridges: suspension and truss bridges. It discusses their origin, history, main elements, forces and loads, construction, failures, solutions, and advantages. The document also includes specifications for truss bridges, structural members, loads, common types, and applications.
Typology: Slides
2023/2024
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TYPES
OF
BRIDGES
SUSENSION BRIDGE TRUSS BRIDGE
SUSPENSION BRIDGES A Suspension bridge is a type of bridge in which the deck (load bearing portion) is hung below suspension cables on vertical suspenders. This kind of bridges can span 2,000 to 7,000 feet –way farther then any other type of bridge. Most suspension bridges have a truss system beneath the roadway to resist bending and twisting. The first modern examples of this type of bridge were built in early 19 th^ century.
MAIN ELEMENTS
Main/steel cable
Suspender
Trusses
Supporting tower
Anchor cable
Foundation of tower
Decking and stiffening girder
FORCES/LOADS ON BRIDGE Two types of forces acts on suspension bridges
Compression:
The force of compression Pushes down on the suspension Bridges deck but because it is A suspended roadway the cables Transfer the compression to the Towers which dissipate the Compression directly into earth Where they are firmly entrenched
CONSTRUCTION
1) Tower construction
2) Cable construction
3) Anchorage construction
4) Deck construction
5) Finishing
FAILURES OF SUSPENSION BRIDGES
1) Deck vibration
2) Ship collision with pylon
3) Tendon system problems
SOLUTIONS
Deck vibration
Modification of deck Use of dampers
SPECIFICATIONS
- Members are perfectly straight.
- Loads are applied at the joints.
- Joints are pinned and frictionless.
- Members are subjected to axial
force only.
STRUCTURAL MEMBERS
- Solid bar
- Solid rod
- Hollow tube
- I-section
- Angle section
ADVANTAGES OF
TRUSS
They are very cheap and cost effective.
Can be installed quickly even without heavy
equipment to lift it into place.
Unique properties of triangular object allow
trusses to span across longer distances.
COMMON TYPES OF TRUSSES