Combined strengthening structure for repairing cracked steel bridge deck by additionally arranging fiber reinforced layer

Abstract

The invention discloses a combined strengthening structure for repairing a cracked steel bridge deck by additionally arranging a fiber reinforced layer. The combined strengthening structure is characterized by comprising the fatigue cracked steel bridge deck, the fiber reinforced composite material layer, shear force connecting pieces, reinforcing meshes and a concrete layer; the shear force connecting pieces are arranged on the fiber reinforced composite material layer; the fiber reinforced composite material layer is laid on the cracked part of the fatigue cracked steel bridge deck; the reinforcing meshes are placed on the fatigue cracked steel bridge deck; the concrete layer is poured on the fatigue cracked steel bridge deck; and the shear force connecting pieces and the reinforcing meshes are arranged in a covering manner and are connected with the fatigue cracked steel bridge deck.

Description

Technical field [0001] The invention relates to a bridge structure used for strengthening steel bridge decks, in particular to a combined strengthening structure for solving cracked steel bridge decks by adding fiber reinforcement layers. Background technique [0002] Since its inception, orthotropic steel bridge decks have been favored by bridge designers for their light weight, large ultimate bearing capacity, wide application range, short construction period, beam height, and graceful shape, and are especially suitable for long-span bridges. However, with the increase of service life, due to the uneven structural rigidity of its own, coupled with the large amount of bridge traffic in our country, serious overloading, and the harsh environment of the bridge, its disadvantages have become increasingly prominent. Different fatigue cracks and paving of steel bridge decks have appeared. Two major diseases are damage to equipment. The main girder of the more famous Guangdong Humen ...

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Problems solved by technology

[0003] However, there are still many problems in the structure as follows: 1. Due to heavy traffic flow, serious overloading, and harsh external environment, the cracked bridge deck has not been reinforced, and the steel bridge deck has the risk of further corrosion, cracking or even damage; 2. The original patent The steel strips are spot-welded to the cracked bridge deck, which cannot be tightly combined with the cracked bridge deck, and there must be gaps, there is a risk of corrosion, and they cannot bear the same force with the original bridge deck; 3. The steel strips are dense and used too much The steel slats of the bridge will increase the self-weight of the bridge and reduce the bearing capacity; the ultra-high performance concrete used generally needs to be steamed at high temperature, and the construction process is complicated; 4. Welding a large number of studs on the cracked steel bridge deck will introduce welding residual stress and even form New cracks, further weakening the bearing capacity of the steel bridge deck

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