CN212223609U - A FRP profile reinforced steel bridge deck structure - Google Patents

Abstract

An FRP profile reinforced steel bridge deck structure, comprising a steel bridge deck, a bridge deck pavement layer and an FRP profile, characterized in that the bridge deck pavement layer is located on the upper part of the steel bridge deck, and the bottom of the steel bridge deck is transverse bridge There are long U-shaped ribs at the longitudinal intervals, and the FRP profiles are arranged at the bottom of the steel bridge deck between the U-shaped ribs. One of the spacing arrangements. The utility model provides an FRP profile reinforced steel bridge deck structure. The FRP profile is pasted at the effective position to effectively prevent fatigue problems such as cracking of the orthotropic steel bridge deck. At the same time, the FRP profile is lightweight, high strength and good corrosion resistance. It is convenient and fast, with low production and installation costs, and does not need to interrupt and hinder traffic while meeting the normal use and durability requirements of bridge structures.

Description

A FRP profile reinforced steel bridge deck structure

technical field

The utility model relates to a steel bridge reinforcement structure, in particular to an FRP profile reinforcement steel bridge deck structure, which belongs to the technical field of bridge reinforcement.

Background technique

The bridge deck structure of highway steel bridge is mainly composed of steel bridge deck and bridge deck pavement. It is the main structure that directly bears the wheel load on the bridge and transmits it to the main beam, and is also one of the most vulnerable parts of the bridge structure. As an important landmark innovation in modern bridge engineering, orthotropic steel bridge deck has outstanding advantages such as light weight, high bearing capacity, and wide application range, and has become the preferred bridge deck structure for long-span bridges. However, under the repeated action of a large number of traffic loads, fatigue cracks form and expand in the fatigue vulnerable parts (or "fatigue hot spots") with prominent stress concentration problems, resulting in the occurrence of fatigue damage of orthotropic steel bridge decks.

Most of the current orthotropic steel bridge decks use closed longitudinal stiffeners (usually inverted trapezoidal ribs, customarily called "U-shaped ribs" or "U-ribs"). In order to alleviate the development of this disease and improve the service life of rigid bridges, the usual methods include: improving the geometric configuration of the weld, increasing the local stiffness of the weld, improving the performance of the steel, and developing the composite steel bridge deck structure. Europe and Japan first proposed to use high-performance concrete instead of asphalt concrete as the structural layer, and through the combined bridge deck system, the local stiffness of the bridge deck was improved, and the mechanical performance of the orthotropic steel bridge deck and pavement layer was improved. However, these methods are only suitable for new steel structure bridge projects, and some existing steel bridge structures also need to be reinforced. In view of the above problems, there are also a lot of studies at present. For example, Chinese Patent No. "CN 109338904 A" discloses a reinforcement structure for cracked steel bridge decks. The structure uses carbon fiber slats and metal slats with welded The cracked steel panels are reinforced to greatly improve the tensile strength of the bottom surface of the ultra-high performance concrete layer, thereby preventing the bottom surface of the concrete layer from cracking. However, the structure has limited improvement in stiffness, complicated welding construction, and damage to the original structure; another example is the Chinese Patent No. "CN 109468939 A" discloses a steel box bridge deck composite reinforced pavement structure and its construction method. The steel box bridge deck is laid on the original steel plate surface of the original steel box bridge deck to be reinforced, and the construction is simple, the operation is convenient, and the on-site construction quality is easy Control, and low cost, small damage to the original structure, and obvious reinforcement effect, but the steel box structure itself is easy to rust in the air, and the later maintenance costs are large.

To sum up, the existing structures or methods for reinforcing steel bridge decks have limitations in effect, high maintenance costs in later stages, and cannot meet the reinforcement requirements for fatigue cracking of steel bridge decks.

SUMMARY OF THE INVENTION

The purpose of this utility model is to provide an FRP profile reinforced steel bridge deck structure, which can effectively prevent fatigue problems such as cracking of orthotropic steel bridge decks. Fast, low cost to manufacture and install, and without interrupting and impeding traffic while meeting the normal use and durability needs of the bridge structure.

The technical scheme of the utility model is as follows: an FRP profile reinforced steel bridge deck structure comprises a steel bridge deck, a bridge deck paving layer and an FRP profile, which is characterized in that the bridge deck paving layer is located on the upper part of the steel bridge deck , the bottom of the steel bridge deck is provided with a long U-shaped rib in the transverse direction, and the FRP profiles are arranged at the bottom of the steel bridge deck between the U-shaped ribs. Arrangement, the arrangement is one of full-room arrangement or interval arrangement.

The FRP profile is one of a rectangular FRP profile, an L-shaped FRP profile, a T-shaped FRP profile, an I-shaped FRP profile, and a mouth-shaped FRP profile.

The FRP profile material is one of carbon fiber composite materials, basalt fiber composite materials, glass fiber composite materials or aramid fiber composite materials.

The FRP profiles are arranged along the longitudinal length of the bridge or are arranged at intervals, and are arranged continuously or at intervals along the transverse direction of the bridge.

The connection method between the FRP profile and the steel bridge deck and the connection method between the FRP profile and the U-shaped rib include adhesive connection, bolt connection, and adhesive and bolt combination connection.

The key point of the FRP profile reinforced steel bridge deck structure provided by the utility model is that the prefabricated FRP profiles are fixedly installed at the bottom of the steel bridge deck, which can effectively reinforce the steel bridge deck and prevent the steel bridge deck from being caused by the repeated action of vehicle loads for a long time. It can prevent fatigue cracking and prevent the continuous development of existing cracks, ensure the safety and reliability of the entire steel bridge system, and improve the overall bearing capacity of the bridge to a certain extent.

The utility model has obvious advantages and has the following beneficial effects:

(1) The prefabricated FRP profiles are lightweight, and the reinforcement makes the self-weight of the bridge deck structure not increase much, and realizes the lightweight reinforcement of the bridge deck structure.

(2) Combining FRP profiles and steel bridge decks through resin materials, the effective combination of the two materials can prevent the generation of new fatigue cracks. At the same time, the resin itself has a certain strength, which can effectively prevent the continued development of the original cracks and improve the overall reliability. Spend.

(3) FRP profiles need to be prefabricated according to different parts of the steel bridge deck. The forming process is relatively simple, and the strength of FRP profiles exposed to the air will not be reduced due to corrosion.

(4) Compared with other methods of reinforcing steel bridge deck, it will not cause new damage to the original structure, the construction is efficient and fast, and the later maintenance cost is low.

Description of drawings:

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention.

Figure 1 is a schematic diagram of the overall structure of a FRP profile reinforced steel bridge deck structure;

Figure 2 is a schematic cross-sectional view of a FRP profile of a steel bridge deck structure reinforced by FRP profiles (rectangular FRP profiles and L-shaped FRP profiles are arranged in a full house);

Figure 3 is a schematic cross-sectional view of the FRP profile of a FRP profile reinforced steel bridge deck structure (T-shaped FRP profiles are arranged in a full house);

Figure 4 is a schematic cross-sectional view of a FRP profile of a FRP profile reinforced steel bridge deck structure (I-shaped FRP profiles are arranged in a full house);

Figure 5 is a schematic cross-sectional view of a FRP profile of a FRP profile reinforced steel bridge deck structure (the mouth-shaped FRP profiles are arranged in a full house);

Fig. 6 is a sectional view of the arrangement of FRP profiles of a FRP profile reinforced steel bridge deck structure (T-shaped FRP profiles are arranged at horizontal intervals);

Fig. 7 is a sectional view of the arrangement of FRP profiles of a FRP profile reinforced steel bridge deck structure (I-shaped FRP profiles are arranged at horizontal intervals);

Fig. 8 is a sectional view of the arrangement of FRP profiles of a FRP profile reinforced steel bridge deck structure (the mouth-shaped FRP profiles are arranged at horizontal intervals);

In the drawings, 1 is a steel bridge deck, 2 is a bridge deck pavement, 3 is a FRP profile, 31 is a rectangular FRP profile; 32 is an L-shaped FRP profile; 33 is a T-shaped FRP profile; 34 is an I-shaped FRP profile ; 35 is a mouth-shaped FRP profile; 4 is a U-shaped rib.

Detailed ways:

In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific embodiments of the present utility model are now described with reference to the accompanying drawings, but the protection scope of the present utility model is not limited to the following specific examples.

As shown in the accompanying drawings, an FRP profile reinforced steel bridge deck structure includes a steel bridge deck 1, a bridge deck pavement layer 2 and an FRP profile 3. It is characterized in that, the bridge deck pavement layer 2 is located in the steel bridge deck. In the upper part of 1, the bottom of the steel bridge deck 1 is provided with a long U-shaped rib 4 at a transverse interval, and the FRP profiles 3 are arranged at the bottom of the steel bridge deck 1 between the U-shaped ribs 4. The FRP profiles 3 between the bridges are arranged longitudinally or laterally along the bridge, and the arrangement is one of the full hall arrangement or the interval arrangement.

The FRP profile 3 is one of a rectangular FRP profile 31 , an L-shaped FRP profile 32 , a T-shaped FRP profile 33 , an I-shaped FRP profile 34 , and a mouth-shaped FRP profile 35 .

The material of the FRP profile 3 is one of carbon fiber composite materials, basalt fiber composite materials, glass fiber composite materials or aramid fiber composite materials.

The arrangement of FRP profiles 3 is arranged along the longitudinal length of the bridge or at intervals in sections, and is arranged continuously or at intervals along the transverse direction of the bridge.

The connection method between the FRP profile 3 and the steel bridge deck 1 and the connection method between the FRP profile 3 and the U-shaped rib 4 include adhesive connection, bolt connection, and adhesive and bolt combination connection.

Example 1:

As shown in FIG. 2 , an FRP profile reinforced steel bridge deck structure includes a steel bridge deck 1 , a bridge deck pavement 2 , an FRP profile 3 and a U-shaped rib 4 . A rectangular FRP profile 31 and an L-shaped FRP profile 32 are installed at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4 .

Example 2:

As shown in FIG. 3 , an FRP profile reinforced steel bridge deck structure includes a steel bridge deck 1 , a bridge deck pavement 2 , FRP profiles 3 and U-shaped ribs 4 . A T-shaped FRP profile 33 is installed at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4 .

Example 3:

As shown in FIG. 4 , an FRP profile reinforced steel bridge deck structure includes a steel bridge deck 1 , a bridge deck pavement 2 , FRP profiles 3 and U-shaped ribs 4 . An I-shaped FRP profile 34 is installed at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4 .

Example 4:

As shown in FIG. 5 , an FRP profile reinforced steel bridge deck structure includes a steel bridge deck 1 , a bridge deck pavement layer 2 , an FRP profile 3 and a U-shaped rib 4 . The mouth-shaped FRP profiles 35 are installed at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4 .

Example 5:

As shown in Figures 6 to 8, a FRP profile reinforced steel bridge deck structure includes a steel bridge deck 1, a bridge deck pavement 2, FRP profiles 3 and U-shaped ribs 4. T-shaped FRP profiles 33, I-shaped FRP profiles 34, and mouth-shaped FRP profiles 35 are installed at intervals at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4.

Claims (5)

1. The utility model provides a steel bridge deck structure is consolidated to FRP section bar, includes steel bridge deck slab (1), bridge deck pavement layer (2) and FRP section bar (3), its characterized in that bridge deck pavement layer (2) be located the upper portion of steel bridge deck slab (1), the bottom cross bridge of steel bridge deck slab (1) is equipped with logical long U type rib (4) to the interval, FRP section bar (3) set up in steel bridge deck slab (1) bottom between U type rib (4), FRP section bar (3) between per two U type ribs (4) are along the bridge vertically or transversely arranged, the arrangement mode is one of full hall arrangement or interval arrangement.

2. The FRP profile reinforced steel bridge deck structure as claimed in claim 1, wherein the FRP profile (3) is one of a rectangular FRP profile (31), an L-shaped FRP profile (32), a T-shaped FRP profile (33), an I-shaped FRP profile (34) and a square FRP profile (35).

3. The FRP profile reinforced steel bridge deck structure as claimed in claim 1, wherein the material of the FRP profile (3) is one of carbon fiber composite material, basalt fiber composite material, glass fiber composite material or aramid fiber composite material.

4. An FRP-section-reinforced steel bridge deck structure according to claim 1, wherein the FRP-sections (3) are arranged along the longitudinal length of the bridge or at intervals in sections, and are arranged continuously or at intervals in sections along the transverse direction of the bridge.

5. The FRP profile reinforced steel bridge deck structure as claimed in claim 1, wherein the connection mode of the FRP profile (3) and the steel bridge deck (1) and the connection mode of the FRP profile (3) and the U-shaped ribs (4) comprise adhesive connection, bolt connection and adhesive and bolt combination connection.

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