Profile steel-UHPC (ultra-high performance concrete) combined bridge deck structure suitable for cantilever state as well as construction method thereof

A combined bridge deck and combined bridge technology, used in bridges, bridge parts, bridge construction, etc., can solve the problem of large cross-sectional size of bridge decks, and achieve the effect of less welding, reducing cracking risk, and reducing the risk of fatigue cracking.

Active Publication Date: 2019-04-12
HUNAN UNIV
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However, in order to arrange prestressed tendons,...

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  • Profile steel-UHPC (ultra-high performance concrete) combined bridge deck structure suitable for cantilever state as well as construction method thereof
  • Profile steel-UHPC (ultra-high performance concrete) combined bridge deck structure suitable for cantilever state as well as construction method thereof
  • Profile steel-UHPC (ultra-high performance concrete) combined bridge deck structure suitable for cantilever state as well as construction method thereof

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[0060] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0061] Unless otherwise defined, all technical terms used hereinafter have the same meanings as commonly understood by those skilled in the art. The terminology used herein is only for the purpose of describing specific embodiments, and is not intended to limit the protection scope of the present invention.

[0062] refer to Figure 2-18 , a steel-UHPC composite bridge deck structure suitable for the cantilever state in this embodiment, the bridge deck structure includes steel-UHPC light composite bridge deck and the surrounding seam structure, the steel-UHPC light composite bridge deck consists of steel 2, It consists of a steel strip 3 with short studs 5 welded on t...

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Abstract

The invention discloses a profile steel-UHPC (ultra-high performance concrete) combined bridge deck structure suitable for a cantilever state as well as a construction method thereof. A profile steel-UHPC lightweight combined bridge deck slab is mainly formed by combining profile steel, steel plate strips welded with short studs as well as an UHPC slab; the profile steel serving as a longitudinalrib is arranged in a transverse bridge direction at intervals; the steel plate strips are arranged on an upper flangeslab of the profile steel in the bridge direction at intervals; and longitudinal and transverse seam structures are T-shaped seams. Finished product profile steel is adopted, so that the manufacturing cost is low, the welding quantity is small and the risk of fatigue cracking is greatly reduced; meanwhile, higher bending-resistant inertia moment is achieved, the cracking risk of the bridge deck slab is reduced and the transverse tension resistance of the bottom surface of the bridge deck slab is enhanced; UHPC in the longitudinal seam position is converted from a pulled state to a pressed state, so that the fact that the operation stage is not cracked can be guaranteed without configuring a prestressing force when the bridge deck slab is under the transverse cantilever state; moreover, breakage in a high tensile stress area can be avoided, shrinkage crack can be avoided,the self weight of the bridge deck slab is reduced, and the method is simple to operate and easy to construct.

Description

technical field [0001] The invention belongs to the technical field of bridge components and construction thereof, in particular to a section steel-UHPC composite bridge deck structure in a cantilever state and a construction method thereof. Background technique [0002] Traditional steel-concrete composite beams have a reasonable force and make full use of the advantages of steel in tension and concrete in compression, so that the performance of the combination is better than the simple superposition of the properties of the two materials, so it has good technical and economic benefits. However, with the increase of bridge span, when steel-concrete composite beams are applied to continuous system bridges and long-span flexible system bridges, the negative bending moment area faces the risk of tensile cracking of the upper edge concrete, while the conventional anti-corrosion The effect of cracking measures is not ideal. [0003] In the traditional composite girder cable-sta...

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Application Information

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IPC IPC(8): E01D19/12E01D21/00
CPCE01D19/125E01D21/00Y02A30/30
Inventor 邵旭东李玉祺曹君辉
Owner HUNAN UNIV
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