Lightweight steel-ultrahigh-performance concrete stiffened combination rib plate and construction method thereof

Abstract

The invention discloses a lightweight steel-ultrahigh-performance concrete stiffened combination rib plate and a construction method thereof. The combination rib plate comprises a panel (1), a slab rib (2), a stiffened strengthening component (3) and a shear connecting part (4), the stiffened strengthening component (3) is arranged on the bottom of the slab rib (2) and has the equal width with thebottom face of the slab rib (2), the slab rib (2) and the stiffened strengthening component (3) are connected into a whole through the shear connecting part (4), the top of an edge plate rib on the edge of the combination rib plate is provided with a notch (5), and a plurality of wedge-shaped ports (6) are formed under the notch (5) in the length direction of the edge plate rib. The lightweight steel-ultrahigh-performance concrete stiffened combination rib plate and the construction method thereof have the advantages that the problem that the steel-ultrahigh-performance concrete rib plate fatigues and cracks easily is solved, the crack resistance of a wet joint between precast slabs is significantly improved, the excellent tensile and compressive properties of ultrahigh-performance concrete and steel material can be fully utilized, the structural self-weight is lighter, the utilization efficiency of the cross section is higher, the integral and local rigidity of a bridge deck slab ofthe stiffened combination rib plate is higher, the anti-crack and anti-overload capacity is strong, and the construction is convenient.

Description

technical field [0001] The invention belongs to the field of bridge structure construction, and in particular relates to a light steel-ultra high performance concrete stiff composite rib plate and a construction method. Background technique [0002] The bridge deck directly bears the vehicle load and the environment, and is the most direct component affected by overload, corrosion, fatigue and other unfavorable factors. Therefore, its working status will directly affect the durability and driving comfort of the main structure of the inverted bridge. Orthotropic steel decks and ordinary concrete decks are two main types of decks currently used in bridge engineering. Ordinary concrete bridge decks can better adapt to asphalt concrete bridge deck pavement or cement pavement, and the driving effect is better. The demand for span bridges, and it is easy to crack near the wet joints, negative bending moment area, and stay cable anchorage area. Orthotropic steel bridge decks have...

AI Technical Summary

Problems solved by technology

However, this type of structure is only suitable for ordinary concrete composite bridge decks. When using ultra-high performance concrete bridge decks, the steel plates set at the bottom will form a strong constraint boundary on the ultra-high performance concrete, which is easy to make the ultra-high performance concrete in the process of maintenance and operation. Shrinkage and cracking will affect the safety of the structure, and the steel plate installed at the full width of the bottom will not be able to exert the excellent compressive and tensile properties of ultra-high performance concrete. Continuous and random distribution of steel fibers in ultra-high performance concrete with adverse effects on structural safety

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