Reinforcement structure for solving cracked steel bridge deck by using lightweight aggregate concrete
A technology of lightweight aggregate concrete and reinforcement structure, applied in the direction of bridge reinforcement, bridges, bridge parts, etc., can solve the problems of harsh environment of steel bridge deck, high density of steel strips, reducing bridge bearing capacity, etc., so as to reduce residual stress after welding , Good anti-fatigue performance, the effect of ensuring welding quality
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Embodiment 1
[0043] Embodiment 1, the present invention includes a fatigue cracked steel bridge deck, a shear connector, a fiber reinforced composite material layer, a steel mesh and a lightweight aggregate concrete layer, and the fatigue cracked steel bridge deck is provided with a shear connector, so The steel mesh is placed on the fatigue-cracked steel bridge deck, the fiber reinforced composite material layer is laid to the cracked part of the fatigue-cracked steel bridge deck, the lightweight aggregate concrete layer is poured on the fatigue-cracked steel bridge deck, and Covering the shear connector, the fiber reinforced composite material layer, and the steel mesh are connected to the fatigue cracked steel bridge deck, the shear connector of the present invention is connected on the fiber reinforced composite material layer, and the fiber reinforced composite material is The shear connectors are arranged in the same direction, the fatigue cracked steel bridge deck is provided with sh...
Embodiment 2
[0044] Example 2, the fiber-reinforced composite material layer of the present invention is provided with openings and perforated steel plate connectors, and the fiber-reinforced composite material layer is arranged on the fatigue-cracked steel bridge deck at intervals along the bridge direction through the perforated steel plate connectors. The perforated steel plate connector is composed of vertical perforated steel plates in the fiber-reinforced composite material layer, and resists the gap between the fiber-reinforced composite material layer and the lightweight aggregate concrete through the light aggregate concrete in the holes of the fiber-reinforced composite material layer. Longitudinal shear force and pull-out force, the open-hole steel plate connector can be connected longitudinally to the upper flange of the fiber-reinforced composite material layer by two, refer to Figure 1 to Figure 3 , and the rest are the same as the combination of any of the above embodiments ...
Embodiment 3
[0045] Embodiment 3, compared with the stud connector, the perforated steel plate connector (PBL connector) has little influence on the steel beam, and before reaching the ultimate load, the perforated steel plate connector (PBL connector) Greater stiffness. When the slip reaches 15mm, it can still bear 80% of the ultimate load, and the bearing capacity of the studs begins to decline after the slip reaches 10mm, and some studs are cut off, see Figure 1 to Figure 3 , and the rest are the same as the combination of any of the above embodiments or two or more embodiments.
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