MILAU VIADUCT...TALLEST CABLE STAYED BRIDGE OF THE WORLD


1. Introduction.. 
2. Aesthetics
2.1 Fulfillment of Function.. 
2.2 Proportions of the Bridge
2.3 Order within the Structure
2.4 Refinements of Design.. 
2.5 Integration into the Environment
2.6 Surface Texture
2.7 Colour of Components
2.8 Character
2.9 Complexity in Variety
2.10 Incorporation of Nature
3. Loadings
3.1 Dead Loads
3.2 Super Imposed Dead Loads
3.3 Live Traffic Loads
3.4 Wind Loading
3.5 Temperature Loading
3.6 Other Load Effects
4. Structural Assessments
5. Construction.. 
5.1 Foundation.. 
5.2 Pier
5.3 Temporary Support Towers
5.4 Steel Deck.. 
5.5 Pylons
6. Conclusion.. 
7. References

1. Introduction

The Millau Bridge provides the final missing link in the A75 highway ultimately connecting Paris to Barcelona. Prior the bridge construction traffic would have had to descend the Tarn Valley causing a bottle neck in the town of Millau. The multi-span cable stayed bridge passes over the Tarn valley at its lowest point between two plateaus. In order to do this it had to become the tallest road bridge in the world creating the world’s tallest bridge piers standing at 244.96m, the structure rising to 343m at the top of the pylon. The bridge also holds the title of the world’s longest multi-span cable stayed bridge with a total length of 2460m. There is a slight gradient of 3% from North to South as well as a slight curve about a radius of 20,000m. The piers are of post tensioned reinforced concrete and the deck and pylons are of steel.

Bridges are often considered to belong to the engineer's realm rather than the architect's. But the architecture of infrastructure has a powerful impact on the environment. The Millau Viaduct, designed in collaboration with engineers, illustrates how the architect can play an integral role in bridge design.
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