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If the slab has a stiffness that is different in two directions (at right angles), then the deck is known and analyzed as an orthotropic deck. A beam and slab deck is one where the beams may deflect somewhat independently, and any transverse forces are carried in the deck. A cellular deck is one where a number of thin slabs and webs will ...
The original deck was a 5.5-inch (140 mm) thick reinforced concrete slab, with a mortar wearing surface 0.5 inches (13 mm) thick. [60] To facilitate maintenance, the bridge was designed with two 2.5-inch (64 mm) lines (carrying compressed air and potable water) extending from end to end.
The original concrete deck of the 670 m (2,200 ft) North Viaduct of the Lions Gate Bridge was replaced with a lighter and wider orthotropic deck, carried out in sections using a series of short closures of the bridge. [3] Cantilever orthotropic decks allowed the Tamar Bridge to remain open whilst the main deck was replaced in 1999. An ambitious ...
Beam bridges are the simplest structural forms for bridge spans supported by an abutment or pier at each end. [1] No moments are transferred throughout the support, hence their structural type is known as simply supported. The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid
These create standardized I-beam and wide flange beam [7] shapes up to 100 feet in length. A plate girder is a girder that has been fabricated by welding plates together to create the desired shape. The fabricator receives large plates of steel in the desired thickness, and then cuts the flanges and web from the plate in the desired length and ...
The deck is connected to the arch by 12 pairs of vertical hangers at the arches and the deck intersection point, 60 m from the centre of the bridge, rigidly joined by a cross brace. Each arch is embedded at the ends in a reinforced concrete block (the smallest being 6 m long, 7 m high and 5 m wide) connected by means of a joint of 28 steel bars ...
The bridge structure comprises 18 structural steel bridge decks, 20 structural steel masts and 16 horizontal spars [citation needed] or in layman's terms horizontal masts. 72 precast concrete deck slabs sit on the main bridge deck and are secured to the steel structure and together by in-situ concrete stitch pours [citation needed].
The bridge's reinforced-concrete counterweights, measuring 5.5 feet (1.7 m) high by 11.5 feet (3.5 m) wide, was supported by pivots at the ends of the girders. The trunnions were supported by box-girder posts on the sides of the bascule leaves and each set of inside trunnion posts were braced by a girder ran both between them and to the ...
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