Reinforcement structure for solving cracked steel bridge deck by using lightweight aggregate concrete

Abstract

The invention relates to a reinforcement structure for solving a cracked steel bridge deck by using lightweight aggregate concrete. According to key points of the technical scheme, the reinforcement structure comprises the fatigued cracked steel bridge deck, shear connecting pieces, fiber reinforced composite layers, reinforcing meshes and a lightweight aggregate concrete layer. The fatigued cracked steel bridge deck is provided with the shear connecting pieces, and the reinforcing meshes are placed on the fatigued cracked steel bridge deck. The fiber reinforced composite layers are laid on the crack parts of the fatigued cracked steel bridge deck, and the lightweight aggregate concrete layer is poured on the fatigued cracked steel bridge deck and covers the shear connecting pieces, the fiber reinforced composite layers and the reinforcing meshes to be connected with the fatigued cracked steel bridge deck. The shear connecting pieces are connected to the fiber reinforced composite layers, and the shear connecting pieces are arranged in the transverse bridge direction of the fatigued cracked steel bridge deck by fiber reinforced composites. The shear connecting pieces are arranged on the fatigued cracked steel bridge deck, and the fiber reinforced composite layers connected with the shear connecting pieces are laid between the shear connecting pieces connected with the steel bridge deck, wherein the spacing of the adjacent shear connecting pieces is 100-300 mm.

Description

technical field [0001] The invention relates to a bridge structure for reinforcing orthotropic steel bridge decks, in particular to a reinforcing structure for cracked steel bridge decks by adopting light aggregate concrete. Background technique [0002] As an important structural form of steel bridge decks, orthotropic steel decks have been widely used due to their light weight, high strength, and short construction period. However, with the increase of service time, two types of diseases usually occur on the steel bridge deck: fatigue cracking of the steel structure of the steel bridge deck and damage to the bridge deck pavement, which seriously affect the normal use of the steel bridge. At present, different degrees of fatigue cracks have been observed in bridges with orthotropic steel decks at home and abroad. The main girders of important bridge structures such as the Humen Bridge that have been built in China all adopt steel box girder orthotropic plate structures. T...

AI Technical Summary

Problems solved by technology

[0003] However, there are still many problems in this structure: 1. The original bridge deck has not been reinforced, and the environment of the steel bridge deck is harsh, and the steel bridge deck is in danger of further cracking and corrosion; 2. The steel strips are spot welded to the fatigue-cracked steel bridge The panel, which cannot be closely combined with the original bridge deck, must leave a gap, and cannot bear the same force with the original front panel; 3. The density of steel slats and ultra-high performance concrete is relatively high, because it increases the self-weight of the bridge, Reduced bridge bearing capacity

4. The original bridge deck has been cracked, and short studs are welded again, which brings welding residual stress and new cracks, which further weakens the bearing capacity of the steel bridge deck

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