Double-deck bridge floor combined trussed girder bridge

Abstract

A combined truss bridge of double bridge decks relates to a novel bridge structure and the combined truss bridge of double bridge decks consists of an upper concrete bridge deck, a steel structure web member and a lower concrete bridge deck. The upper and lower bridge decks are used for bearing the load of vehicles and are used as an upper chord part and a lower chord part to share the global stress with the global structure. The steel structure web member consists of a slant web member and a vertical web member, and combines the upper and the lower concrete bridge decks as a whole to be used for resisting the shearing force of the truss bridge. The upper concrete bridge deck and the lower concrete bridge deck in tensile areas are provided with vertically stressed steel bars or section steel. The invention, compared with traditional single bridge deck combined girder bridges, enjoys greater traffic capacity and higher traffic comfort; compared with steel truss bridges, the invention remarkably reduces steel consumption by using concrete bridge decks as compression chords, and has the advantages of low noise, easy maintenance, good durability and so on.

Description

technical field [0001] The invention relates to a novel bridge structure, which belongs to the field of bridge engineering. Background technique [0002] Traditional steel-concrete composite bridges use a single-layer deck, which consists of a concrete slab on the upper part used as a bridge deck and a steel plate girder or steel truss girder on the lower part. For composite beams designed as continuous beams, the steel plate girder or steel truss girder in the middle support area is in a state of compression, which is not conducive to exerting the bearing capacity of the steel. Furthermore, with the increase of urban traffic volume and the increasingly tight land resources, the use of single-layer bridge decks can no longer meet the needs of traffic development when there are many lanes. Therefore, it is of great significance to study and design a new type of bridge with large traffic capacity, reasonable stress, and certain advantages in economy and construction performan...

AI Technical Summary

Problems solved by technology

For composite beams designed as continuous beams, the steel plate girder or steel truss girder in the middle support area is under compression, which is not conducive to the bearing capacity of the steel

Furthermore, with the increase of urban traffic volume and the increasingly tense land resources, the use of single-layer bridge decks can no longer meet the needs of traffic development when there are many lanes.

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