CN212223609U

CN212223609U - FRP section bar reinforcing steel bridge deck structure

Info

Publication number: CN212223609U
Application number: CN202020486776.XU
Authority: CN
Inventors: 魏洋; 钱昊; 朱超; 程勋煜; 唐煜; 李国芬
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-12-25
Anticipated expiration: 2030-04-07

Abstract

The utility model provides a steel bridge deck structure is consolidated to FRP section bar, includes steel bridge deck slab, bridge deck pavement layer and FRP section bar, its characterized in that, bridge deck pavement layer is located the upper portion of steel bridge deck slab, the horizontal bridge in bottom of steel bridge deck slab is equipped with logical long U type rib to the interval, the FRP section bar sets up in the steel bridge deck slab bottom between the U type rib, FRP section bar between per two U type ribs is along bridge vertical or transverse arrangement, the arrangement mode is for one of full hall arrangement or interval arrangement. The utility model provides a pair of steel bridge deck structure is consolidated to FRP section bar pastes the FRP section bar at the effective position and can effectively prevent fatigue problems such as orthotropic steel bridge deck fracture, and FRP section bar light is high-strength, corrosion resistance is good simultaneously, and this structure construction convenient and fast, preparation and installation cost are lower, need not to interrupt and hinder the traffic when satisfying bridge structures normal use and durability demand.

Description

FRP section bar reinforcing steel bridge deck structure

Technical Field

The utility model relates to a steel bridge reinforced structure, especially a steel bridge deck structure is consolidated to FRP section bar belongs to bridge reinforcement technical field.

Background

The bridge deck structure of the highway steel bridge mainly comprises a steel bridge deck and a bridge deck pavement, is a main structure which directly bears the load of wheels on the bridge and transmits the load to a main beam, and is also one of the most vulnerable parts in the bridge structure. Orthotropic steel bridge deck slab has outstanding advantages of light dead weight, high bearing capacity, wide application range and the like as an important symbolic innovation achievement of modern bridge engineering, and becomes a preferred bridge deck slab structure of a large-span bridge. However, under the repeated action of a large amount of traffic loads, fatigue cracks are formed and spread at fatigue vulnerable parts (or fatigue hot spots) with prominent stress concentration problems, so that the occurrence of fatigue diseases of the orthotropic steel bridge deck is caused.

Currently most orthotropic steel decking panels employ closed longitudinal stiffeners (usually inverted trapezoidal ribs, commonly referred to as "U-shaped ribs" or "U-ribs"). In order to alleviate the development of the disease and prolong the service life of the steel bridge, a common method comprises the following steps: the method has the advantages of improving the geometric configuration of the welding seam, increasing the local rigidity of the welding seam, improving the performance of steel, developing a combined steel bridge deck structure and the like. Europe and japan firstly propose to use high-performance concrete instead of asphalt concrete as a structural layer, improve local rigidity of a bridge deck by combining a bridge deck system, and improve the stress performance of an orthotropic steel bridge deck and a pavement layer. However, these methods are only suitable for newly-built steel bridge projects, and some existing steel bridge structures also need to be reinforced. In order to solve the above problems, a great deal of research is currently carried out, for example, a structure for reinforcing a cracked steel bridge deck slab, disclosed in chinese patent No. CN 109338904 a, is used for reinforcing the cracked steel deck slab by using a carbon fiber lath and a metal lath with a welding shear member, so as 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, but the structure has limited improvement on the rigidity, is complex in welding construction, and damages the original structure; also like the steel box bridge deck combination reinforcing and paving structure and the construction method thereof disclosed in the Chinese patent No. CN 109468939A, the steel box bridge deck is paved on the surface of the original steel plate of the original steel box bridge deck to be reinforced, the construction is simple, the operation is convenient, the field construction quality is easy to control, the cost is low, the damage to the original structure is small, the reinforcing effect is obvious, but the steel box structure is easy to rust in the air, and the later maintenance cost is large.

In conclusion, the existing structure or method for reinforcing the steel bridge deck has the defects of limitation, higher later maintenance cost and incapability of meeting the reinforcement requirement of fatigue cracking of the steel bridge deck.

Disclosure of Invention

The utility model aims at providing a steel bridge deck structure is consolidated to FRP section bar is one kind and can effectively prevent fatigue problems such as orthotropic steel bridge deck fracture, and FRP section bar light is high-strength, corrosion resistance is good simultaneously, and this structure construction convenient and fast, preparation and installation cost are lower, need not to interrupt and hinder the traffic when satisfying bridge structures normal use and durability demand.

The technical scheme of the utility model is that: the utility model provides a steel bridge deck structure is consolidated to FRP section bar, includes steel bridge deck slab, bridge deck pavement layer and FRP section bar, its characterized in that, bridge deck pavement layer is located the upper portion of steel bridge deck slab, the horizontal bridge in bottom of steel bridge deck slab is equipped with logical long U type rib to the interval, the FRP section bar sets up in the steel bridge deck slab bottom between the U type rib, FRP section bar between per two U type ribs is along bridge vertical or transverse arrangement, the arrangement mode is for one of full hall arrangement or interval arrangement.

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

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

The FRP section bar arrangement mode is arranged along the longitudinal full length of the bridge or at intervals in sections, and is continuously arranged along the transverse direction of the bridge or at intervals in sections.

The connection mode of the FRP profile and the steel bridge deck and the connection mode of the FRP profile and the U-shaped rib comprise adhesive connection, bolt connection and adhesive and bolt combination connection.

The utility model provides a pair of steel bridge deck structure is consolidated to FRP section bar, its key point lies in the prefabricated FRP section bar of steel bridge floor bottom fixed mounting, can consolidate the steel bridge deck effectively, prevents that the vehicle load from leading to the fatigue fracture of steel bridge deck and preventing the continuation development of having the fracture under the long-term iterative action, guarantees the safe and reliable of whole steel bridge system, has improved the whole bearing capacity of bridge to a certain extent.

The utility model discloses the advantage is showing, has following beneficial effect:

(1) the prefabricated FRP sectional material is light, the self weight of the bridge deck structure is not greatly increased by reinforcing, and the light reinforcing of the bridge deck structure is realized

(2) The FRP section bar and the steel bridge deck are combined through the resin material, the two materials are effectively combined, new fatigue cracks can be prevented, meanwhile, the resin has certain strength, the original cracks can be effectively prevented from being continuously developed, and the overall reliability is improved.

(3) The FRP profile is prefabricated into a required shape according to different positions of the steel bridge deck, the manufacturing and forming process is relatively simple, and the FRP profile is not reduced in strength due to corrosion when exposed in the air.

(4) Compared with other methods for reinforcing the steel bridge deck slab, the method has the advantages that new damage to the original structure is avoided, the construction is efficient and rapid, and the later maintenance cost is low.

Description of the drawings:

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

FIG. 1 is a schematic view of the overall structure of a FRP reinforced steel bridge deck structure;

FIG. 2 is a schematic cross-sectional view of an FRP profile of a FRP-reinforced steel bridge deck structure (a rectangular FRP profile and an L-shaped FRP profile are arranged in a full space);

FIG. 3 is a schematic cross-sectional view of FRP bars in a FRP bar reinforced steel bridge deck structure (T-shaped FRP bars are arranged all around);

FIG. 4 is a schematic cross-sectional view of an FRP section of a FRP-section-reinforced steel bridge deck structure (I-shaped FRP section is arranged in a full space);

FIG. 5 is a schematic cross-sectional view of FRP bars in a FRP bar reinforced steel bridge deck structure (square FRP bars are arranged all around);

FIG. 6 is a cross-sectional view of an FRP profile arrangement (T-shaped FRP profiles are transversely spaced) of the FRP profile reinforced steel bridge deck structure;

FIG. 7 is a cross-sectional view of an FRP profile arrangement (I-shaped FRP profile transverse interval arrangement) of the FRP profile reinforced steel bridge deck structure;

FIG. 8 is a cross-sectional view of an FRP profile arrangement (square FRP profile transverse interval arrangement) of the FRP profile reinforced steel bridge deck structure;

in the attached drawings, 1 is a steel bridge deck, 2 is a bridge deck pavement layer, 3 is an FRP (fiber reinforced plastic) section bar and 31 is a rectangular FRP section bar; 32 is an L-shaped FRP profile; 33 is a T-shaped FRP profile; 34 is an I-shaped FRP profile; 35 is a square FRP profile; 4 is a U-shaped rib.

The specific implementation mode is as follows:

in order to clearly understand the technical features, objects and effects of the present invention, the detailed embodiments of the present invention will be described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following specific embodiments.

As shown in the attached drawings, the FRP section bar reinforced steel bridge deck structure comprises a steel bridge deck 1, a bridge deck pavement layer 2 and FRP section bars 3, and is characterized in that the bridge deck pavement layer 2 is positioned on the upper portion of the steel bridge deck 1, the U-shaped ribs 4 which are full in length are arranged at intervals on the bottom of the steel bridge deck 1 in the transverse direction, the FRP section bars 3 are arranged at the bottom of the steel bridge deck 1 between the U-shaped ribs 4, the FRP section bars 3 between every two U-shaped ribs 4 are arranged longitudinally or transversely along the bridge, and the arrangement mode is one of full-space arrangement or interval arrangement.

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

The FRP section 3 material is one of a carbon fiber composite material, a basalt fiber composite material, a glass fiber composite material or an aramid fiber composite material.

The FRP section bars 3 are arranged along the longitudinal full length of the bridge or at intervals in sections, and are continuously arranged along the transverse direction of the bridge or at intervals in sections.

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.

Example 1:

as shown in fig. 2, the FRP section reinforced steel bridge deck structure includes a steel bridge deck 1, a bridge deck pavement layer 2, an FRP section 3, and U-shaped ribs 4. The rectangular FRP section 31 and the L-shaped FRP section 32 are arranged at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4.

Example 2:

as shown in fig. 3, the FRP section reinforced steel deck structure includes a steel deck 1, a deck pavement layer 2, an FRP section 3, and U-shaped ribs 4. And a T-shaped FRP profile 33 is arranged at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4.

Example 3:

as shown in fig. 4, the FRP section reinforced steel deck structure includes a steel deck 1, a deck pavement layer 2, an FRP section 3, and U-shaped ribs 4. The I-shaped FRP section bar 34 is arranged at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4.

Example 4:

as shown in fig. 5, the FRP section reinforced steel deck structure includes a steel deck 1, a deck pavement layer 2, an FRP section 3, and U-shaped ribs 4. The square FRP section bar 35 is arranged at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4.

Example 5:

as shown in fig. 6 to 8, the FRP section reinforced steel bridge deck structure includes a steel bridge deck 1, a bridge deck pavement layer 2, an FRP section 3, and U-shaped ribs 4. The T-shaped FRP section bar 33, the I-shaped FRP section bar 34 and the square FRP section bar 35 are arranged at the bottom of the steel bridge deck 1 between the two U-shaped ribs 4 at intervals.

Claims

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.