Welded steel segmented construction technique for bridge decks
For other uses, see Deck.
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Fabricating an orthotropic deck section
An orthotropic bridge or orthotropic deck is typically one whose fabricated deck consists of a structural steel deck plate stiffened either longitudinally with ribs or transversely, or in both directions. This allows the fabricated deck both to directly bear vehicular loads and to contribute to the bridge structure's overall load-bearing behaviour. The orthotropic deck may be integral with or supported on a grid of deck framing members, such as transverse floor beams and longitudinal girders. All these various choices for the stiffening elements, e.g., ribs, floor beams and main girders, can be interchanged, resulting in a great variety of orthotropic panels.
Decks with different stiffnesses in longitudinal and transverse directions are called 'orthotropic'. If the stiffnesses are similar in the two directions, then the deck is called 'isotropic'.[1]
The steel deck-plate-and-ribs system may be idealized for analytical purposes as an orthogonal-anisotropic plate, hence the abbreviated designation “orthotropic.”
^Hambly, E C (1976). Bridge Deck Behaviour. E & FN Spon. p. 54.
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million euros. The old concrete deck was replaced by a lighter, stronger orthotropicdeck with a double spine: a steel plate with two continuous longitudinal...
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having six parallel steel arches (span formula 50.5+134.0+50.5 meters). Orthotropicdeck is supported by I-beams; there are six road lanes and two tram tracks...
finding fault in the contractor's work to-date. Each bridge carries an orthotropicdeck atop steel box girders. Each bridge spans a total of 1,200 ft (370 m)...
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