Reinforcing structure for fatigue cracked steel bridge panel

Abstract

The invention relate to a reinforcing structure for a fatigue cracked steel bridge panel. According to the technical scheme, the reinforcing structure for the fatigue cracked steel bridge panel comprises the cracked steel bridge panel, carbon fiber reinforcing battens, metal reinforcing battens, shear connecting parts, steel fabrics, an ultra-high performance concrete layer and a wearing layer, wherein the carbon fiber reinforcing battens are bonded to the cracked steel panel through organic structural adhesives; the shear connecting parts are welded to the metal reinforcing battens; and the metal reinforcing battens with the shear connecting parts are bonded above the carbon fiber reinforcing battens through organic structural adhesives, the steel fabrics are placed on the cracked steel bridge panel, the steel fabrics are composed of longitudinal steel bars and transverse steel bars, the longitudinal steel bars and the transverse steel bars are crisscrossed, the ultra-high performanceconcrete layer is arranged on the cracked steel bridge panel in a pouring mode, the carbon fiber reinforcing battens, the metal reinforcing battens, the shear connecting parts and the steel fabrics are covered with the ultra-high performance concrete layer, the ultra-high performance concrete layer is connected with the cracked steel bridge panel, and the ultra-high performance concrete layer iscovered with the wearing layer.

Description

technical field [0001] The invention relates to a bridge structure for reinforcing orthotropic steel bridge decks, in particular to a reinforcement structure for fatigue-cracked steel bridge decks. Background technique [0002] Since its inception, orthotropic steel decks have been favored by bridge designers for their light weight, large ultimate bearing capacity, quick construction, and beautiful shape, especially for long-span bridges. However, the local stiffness of the steel bridge deck is too low, and it is prone to fatigue cracking problems in long-term operation. The Guangdong Humen Bridge, which has been built in China, uses orthotropic steel bridge decks, and fatigue cracks appear during operation. In response to the above-mentioned diseases, various reinforcement schemes have been proposed, among which the patent "A Lightweight Composite Reinforcement Structure Without Repairing Fatigue-Cracked Steel Bridge Deck (Patent No.: ZL201721470446.6)" proposes spot weldi...

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Problems solved by technology

[0003] However, the patented technology still has the following problems: 1. The steel strips are spot welded to the cracked bridge deck, and cannot be tightly combined with the cracked bridge deck. There is a gap between the two, and there is a risk of corrosion. 2. The density of steel slats is relatively high, and using too many steel slats will increase the self-weight of the bridge and reduce the safety reserve of the bridge; 3. Welding a large number of studs on the cracked steel bridge deck will introduce welding residual stress. Risk of new cracks forming, further weakening the load-bearing capacity of steel bridge decks

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