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Morlans Bridge
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DESCRIPCION

Result of a new contest in San Sebastián, this bridge allows a new street, sloping 9% from the internal hills to the sea border, to cross over a valley embedded in the very urban center. Our proposal was a slender arch, 90 m span, giving support to a deck of hollow cross-section. The arch performs like a shell vault, practically under uniform compression for every possible load case and its shape derives from the condition of pure anti-funicular situation under the self weight, leading us to design a polygonal vault.
Looking for a much greater visual slenderness, the vault is ripped open with a longitudinal groove at its center, giving rise to two solid symmetrical vaults and to also symmetrical pairs of thin wall piers. The whole bridge creates a uncomparable architectonical object which underline the profile of the valley without filling its space. 
 

Framing the urban valley, the polygonal flexible vaults produce a rest area of highest visual interest. The duality created by the vaults and the piers promotes in this way a stronger sense of structural integrity.
The night illumination underlines the different volumes of the bridge, in which we found visual contrasts and geometric integration.
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CATEGORIES

Movable Bridges

Urban Bridges

Rail Roads Bridges

Footbridges

Rehabilitations

Singular Buildings

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Arenas & Asociados - 2012