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cable stayed bridge
cable stayed bridge
INTRODUCTION
• In between Cantilever and Suspension bridge.
• 1595(Renaissance period) Machinae Novae, a
book by Venetian inventor Fausto Veranzio.’
• On fire since mid 19th century.
CABLE STAYED AND SUSPENSION
BRIDGE
TYPES
1. Fan type
2. Harp type
VARIATIONS
1. Side-spar cable-stayed bridge.
– Single offset tower.
– bridge deck(Straight or curved)
around the spar.
C
a
n
a
d
a
I
s
r
a
e
l
VARIATIONS(contd.)
2. Cantilever-spar cable-stayed bridge.
– Forward and Backward cantilever.
Spain
Argentina
VARIATIONS(contd.)
3. Multiple-span cable-stayed bridge.
Jordan
VARIATIONS(contd.)
4. Extradosed bridge.
– b/n Girder and Cable-stayed bridge.
– Horizontal pre-stressing and support.
– uneconomical
But it’s all about
beauty.
P
o
l
a
n
d
VARIATIONS(contd.)
5. Cable-stayed cradle-system bridge.
– No anchorage with pylons.
– Epoxy coated steel tubes.
U.S.A.
Millau Viaduct Bridge(France)
• €400,000,000.
• 120 years warranty.
• Engineer: Michel Virlogeux.
• Architects: Noeman Foster, Michel Virlogeux.
• Tallest bridge in the world(343m)
• Heighest road deck in Europe(270m), 12th in
World.
• 2,460m length deck.
Structure and Construction
• (4 Shafts per Pylon)*7
• Deck
– 32.05m wide
– 4.2m thick
– Inverse Air foil shape.
– 36000T
• Masts
– 87m tall.
– 11 stays each side.
• Stays
– 55 to 91 cables in each.
– 7 strands per cable.
– 3 protective coats,
• Galvanization.
• Petroleum wax.
• Polyethylene sheath.
– Helical weather-strip.
• Surface for traffic
– Corrosion.
– Bonding.
– Traffic.
– Expansion of deck metal.
– Special Bitumen formula.
• 20km horizontal radius to break monotony.
• 10 to 25k vehicles per day.
• Plasma Cut steel panels.
• Wedge Jacks.(Teflon)
• Electric installations and monitoring.
• Toll Plaza.
• TEMPERATURE STRESSES.
– Expansion joints.
– Pylons structure.
Some facts
cable stayed bridge

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cable stayed bridge