Orthotropic steel bridge deck fatigue reinforcing body structure and construction method thereof

Abstract

The invention relates to a bridge structure, in particular to an orthotropic steel bridge deck fatigue reinforcing body structure and a construction method thereof, the orthotropic steel bridge deck fatigue reinforcing body structure comprises a concrete layer on a bridge longitudinal rib, the concrete layer comprises a steel bar group, and the steel bar group comprises transverse steel bars and longitudinal steel bars which are stacked up and down; shearing force pin pieces welded on the steel top plate are arranged below the steel bar group, grooves are formed in the shearing force pin pieces, and the shearing force pin pieces extend along the direction of the transverse steel bars and are arranged along the extending direction of the longitudinal steel bars; the longitudinal steel barsare supported on the shear pin pieces, and the supporting joints are located on the portions, between every two adjacent grooves, of the shear pin pieces. After the shear pin pieces are welded to a full-bridge steel bridge deck, the reinforcing mesh is arranged on the shear pin pieces, the ultra-high-performance concrete structure layer is poured on the shear pin pieces, and the pure anisotropic steel bridge deck is converted into the combined bridge deck, so that the purposes of improving the local rigidity, reducing the stress amplitude and improving the fatigue performance are achieved.

Description

technical field [0001] The invention relates to a bridge structure, in particular to an orthotropic steel bridge deck fatigue reinforcement structure and a construction method thereof. Background technique [0002] Orthotropic steel decks have been widely used in modern long-span bridge engineering because of their high strength and light weight. However, determined by various factors such as structural mechanical characteristics, service environment, loading conditions, structural system and structural detail design, and manufacturing, fatigue cracking of orthotropic steel deck decks is prominent, seriously affecting the safety and durability of bridge structures , Fatigue cracking significantly reduces the service quality of the bridge structure, causing various secondary effects such as interruption of traffic, resulting in major economic losses and adverse social impacts, and has become a worldwide problem that restricts the sustainable development of steel structure bri...

AI Technical Summary

Problems solved by technology

Among them, the occurrence of fatigue cracks at the joint welds between the longitudinal ribs and the roof of the bridge will lead to a significant decrease in the local stiffness of the panel structure directly bearing the wheel load; It has expanded to a considerable extent along the length of the weld and the thickness of the face plate roof, and even has cracked through the thickness of the face plate roof; Rutting, steel box girder water seepage, steel plate corrosion and other serious secondary diseases; in addition, this type of fatigue crack also has problems such as difficult maintenance and reinforcement, high reinforcement costs, and interruption of traffic, which often cause major economic losses and adverse social impacts

[0004] At present, the local reinforcement method for fatigue cracks in the structural details of the longitudinal rib-roof of the bridge is relatively simple. The main method is to mill out the original weld and then repair the welding. This method has the following social and economic problems: (1) Bridge The number of longitudinal rib-panel connection welds is large, and the local repair work is heavy; (2) mainly adopts on-site welding, and the construction environment is poor, and the welding quality is difficult to guarantee; (3) long-term traffic interruption is required, which is likely to cause adverse social impacts

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