Statically Indeterminated Bridges

These bridges feature joints on supports, achieving continuous lengthwise action.
Innovation in prefabrication techniques in the early 90s.

Connections between beams made of post-tensioned high strength steel bars and subsequently injecting mortar grout in the joint.
Longer span lengths with smaller depths are covered by a continuous deck.
Solutions using box girders and U-beams provide the deck with the advantages of closed sections and facilitate the implementation of the joints within them.

Used in straight and curved bridges.
Thanks to the pier continuity, solutions with single supports per pier can be made when box girders are used.
They are used in solutions with variable depth (parabolic and straight) and constant depth.
Used in statically indeterminate solutions in building construction when slabs bear heavy loads.

They improve the dynamic behaviour of rail bridges.
In bridges with statically indeterminate solutions for high speed railways, span lengths of up to 40 metres are covered.
If halved supports or temporary shorings are used for joints between beams, span lengths of up to 80 metres can be reached for road bridge decks.

In decks with heavy loads, very rigid deck solutions are achieved, observing the minimum depth.
The lack of joints between beams considerably improves the aesthetics of the deck and the comfort when passing over.
The contribution of the negative moment on the pier makes it possible to transform the beam load to a positive moment in decks with heavy load requirements, allowing for wider span lengths and reduced depths.
There is less vertical movement, and deflection and dynamic effects are reduced.

Span lengths between supports ranging from 25 to 45 metres if the joints between beams are on pier, and longer if joints are half-lap.
Enables a single support solution to be applied on box girder piers.