This slide includes brief overview of Suspension Bridge.

1. Suspension Bridge
Presented by:
Tek Narayan Bhattarai
074BCE184
Tutor:
Santosh Kumar Jha

2. Presentation Outline
 Introduction to suspension bridge
 Suitability of suspension bridge
 Components of suspension bridge
 Working of suspension bridge
 Examples
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3. Introduction
 Suspension Bridge is a bridge with overhead cables
supporting its roadway
 Road deck is hung below suspension cables on vertical
suspenders.
 Basic structural components: stiffening girders/trusses, the
main suspension cables, main towers, and the anchorages
for the cables
 Main cables are suspended between towers and are finally
connected to the anchorage or the bridge itself
 Vertical suspenders carry the weight of the deck and the
traffic load on it.
https://technologystudent.com/struct1/suspen1.htm
Golden Gate bridge
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4. Where are suspension bridge used?
 Over waterways used for transportation
 Pedestrian bridges on mountain trails
 Lighter use vehicular traffic
 Very long span bridge is required(>1000m
suspension bridge is best option)
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5. Components of Suspension Bridge
Main Cables
Suspender cables
Deck
Tower
Tower foundation
Anchors
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6. Two methods of constructing cable:
Cable are formed from high tensile strength
galvanized steel
a) Parallel wire method
b) Stranded wire method
Modulus of
elasticity is
fully utilized
Diameter of wire is about 0.19 inches.
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7. Working of Suspension Bridge
https://www.tekscan.com/blog/pressure-mapping/what-compression-force
 Compression force(vehicle weight) acts
on deck
 Travels up the cables, ropes or chains
to transfer compression to the towers
 The suspender cables receive the
bridge's tension forces
 Transfer it to main cable
 Then, passes to the anchorages and
into the ground
 Deck truss to stiffen the deck and to
reduce the tendency of the roadway to
sway and ripple.
Deck
Suspender
cable
Main
Cable
Bridge
tower
Anchor
foundation
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8. Advantages
 Longer spans achievable than any other types of
bridge
 Less material required and reduced construction cost
 Better to withstand earthquake movements than
heavier rigid bridges
 Only tensile and compression forces are generated.
So ,it is easy to design
Disadvantages
 Bridge deck might vibrate under high winds.
 Low deck stiffness arouse difficulty in carrying heavy
concentrated live loads
Tacoma Narrows Bridge collapses on November 7, 1940
due to high wind
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9. Suspension Bridges Throughout the World
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10. Suspension Bridges in Nepal
Khusma-Gyadi Bridge
Span: 342 m
Chadani-Doodhara Bridge
Span:1452.95m
Bheri Bridge
Span: 120m
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Mugling Bridge
Span: 125m

11. Thank you
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