CN116427267A - Orthotropic plate structure and preparation method thereof - Google Patents
Orthotropic plate structure and preparation method thereof Download PDFInfo
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- CN116427267A CN116427267A CN202310456762.1A CN202310456762A CN116427267A CN 116427267 A CN116427267 A CN 116427267A CN 202310456762 A CN202310456762 A CN 202310456762A CN 116427267 A CN116427267 A CN 116427267A
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000000137 annealing Methods 0.000 claims description 7
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- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
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- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims 1
- 230000002929 anti-fatigue Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 7
- 206010016256 fatigue Diseases 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
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- 238000005488 sandblasting Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to an orthotropic plate structure, which comprises a steel panel, a plurality of transverse supporting pieces and a plurality of longitudinal reinforcing ribs; the transverse supporting pieces comprise a horizontal connecting plate and a vertical supporting plate; the bottom of the vertical supporting plate is welded on the upper surface of the horizontal connecting plate, and connecting grooves are formed in the top of the vertical supporting plate at equal intervals along the length direction of the vertical supporting plate; the back of the steel panel is welded on the two sides of the tops of the longitudinal reinforcing ribs. The invention also relates to a preparation method of the orthotropic plate structure, which reduces the production difficulty of the anti-fatigue orthotropic plate and increases the overall performance of the anti-fatigue orthotropic plate.
Description
Technical Field
The invention relates to the technical field of steel structures, in particular to an orthotropic plate structure and a preparation method thereof.
Background
The orthotropic plate, i.e. orthotropic steel bridge deck, is a structure which is composed of stiffening ribs (longitudinal ribs and transverse ribs) which are vertical to each other in the longitudinal and transverse directions and a bridge deck cover plate and is used for bearing the load of wheels together. This structure causes structural anisotropy due to its stiffness being different in two directions perpendicular to each other.
For large span suspension bridges and cable-stayed bridges, the dead weight of the steel box girder is about 1/5 to 1/6.5 of the dead weight of the PC box girder. The dead weight of the bridge deck with the orthotropic steel plate structure is about 1/2-1/3 of the dead weight of the reinforced concrete bridge deck or the precast prestressed concrete bridge deck. Therefore, the long-span bridge greatly affected by the dead weight and the orthotropic plate steel box girder are very favorable structural forms. Asphalt concrete pavement is usually paved on the steel deck slab, and the main functions of the asphalt concrete pavement are to protect the steel deck slab and facilitate the travelling performance of vehicles. The construction details of modern orthotropic steel bridge deck plates are composed of steel deck plate longitudinal ribs and transverse ribs and are mutually perpendicular. The thickness of the steel panel is generally 14-18 mm, the longitudinal ribs are generally U-shaped ribs or flat-bulb steel ribs or plate ribs, the thickness of the U-shaped rib plates is generally 6mm or 8mm, the spacing between the cross beams is generally 3.4-4.5 m, and a transverse rib is arranged between the two cross beams. During manufacturing, the full bridge is divided into a plurality of sections, assembled in a factory, hoisted and then connected on a bridge at a construction site. All longitudinal fillet welds (longitudinal ribs, longitudinal baffles, etc.) are usually penetrated, and the intersections of the transverse baffles with the longitudinal welds and the lower flanges of the longitudinal ribs are cut into arc-shaped notches to avoid the arc-shaped notches.
Because the welding positions of the steel box girder are numerous and the stress is complex, the steel box girder always bears the repeated action of the wheel load, and the uncertainty factors of the welding process are numerous, a series of influences such as welding residual stress and the like can exist at the welding positions, and the welding positions of the steel box girder often become the positions with the easiest occurrence of cracks and the rapid development of the cracks of the structure. In addition, the generation and development of fatigue cracking of the steel box girder are also aggravated by high-flow and heavy-load traffic, and particularly, the heavy traffic which plays a leading role in fatigue damage is greatly increased, so that the bridge adopting the section form of the steel box girder becomes a heavy disaster area for the fatigue cracking of the steel.
Disclosure of Invention
In order to solve the technical problems, an object of the present invention is to provide an orthotropic plate structure and a method for manufacturing the same, including a steel panel, a plurality of transverse supports and a plurality of longitudinal reinforcing ribs;
the transverse supporting pieces comprise horizontal connecting plates and vertical supporting plates, and the horizontal connecting plates are arranged at equal intervals and are parallel to each other; the bottom of the vertical supporting plate is welded on the upper surface of the horizontal connecting plate, and connecting grooves are formed in the top of the vertical supporting plate at equal intervals along the length direction of the vertical supporting plate;
the cross sections of the longitudinal reinforcing ribs are matched with the connecting grooves, and the longitudinal reinforcing ribs are clamped on the connecting grooves of the transverse supporting pieces along the transverse direction and fixed on the connecting grooves in a welding mode; adjacent two longitudinal reinforcing ribs are parallel; the longitudinal reinforcing ribs are perpendicular to the vertical supporting plates;
the back of the steel panel is welded on two sides of the tops of the longitudinal reinforcing ribs, and the steel panel is horizontal.
Preferably, the connection parts of the horizontal connecting plates, which are positioned on the vertical supporting plates, are all provided with a plurality of reinforcing plates.
Preferably, rounded corners are arranged on two sides of the bottom of the connecting groove.
Another object of the present invention is to provide a method for manufacturing an orthotropic plate structure, comprising the steps of:
s1, pretreatment: preparing the longitudinal reinforcing ribs and the steel panel, and cleaning the longitudinal reinforcing ribs and the steel panel;
s2, vertically welding the horizontal connecting part at the top of the longitudinal reinforcing rib and the bottom surface of the steel panel in an orthogonal manner; simultaneously, the top of the vertical supporting plate is perpendicularly and vertically welded with the back of the steel panel, and then the vertical supporting plate is welded on the horizontal supporting plate;
s3, placing the orthotropic plate structure formed in the S2 into a heat treatment furnace for integral annealing treatment.
Preferably, in step S1, the steel panel plate is subjected to sand blasting treatment using a metal mixed abrasive formed by mixing 65% steel shot with 35% steel shot.
Further, in step S3, the orthotropic plate structure after the whole annealing treatment is immediately painted with an epoxy zinc-rich paint to form an orthotropic plate rust-proof layer for preventing rust of the steel plate.
Preferably, in the step S2, submerged arc automatic welding is adopted, the welding material is submerged arc welding wire TH 500-NQ-III phi 1.6mm, and the welding parameters are as follows: i is 360-450A, U is 29-34V, welding speed V is 380-430mm/min, and welding position is flat.
Preferably, in step S3, the heat treatment heating apparatus used is integrally heated by electricity, gas or oil gas, and is provided with an automatic control system including temperature and time heat treatment elements; the heat treatment process is designed and tested according to factors including yield strength, chemical composition, plate thickness and batch number of plate batch materials.
The invention has the beneficial effects that: .
(1) Carrying out integral annealing heat treatment on the welded orthotropic plate structure, and eliminating welding residual stress generated by a large number of welding among the steel panel, the transverse supporting piece and the longitudinal reinforcing rib;
(2) The horizontal connecting parts are arranged on the two sides of the top of the longitudinal reinforcing rib, so that the strength of the steel panel is improved, and the welding difficulty of the steel panel and the longitudinal reinforcing rib is reduced;
(3) Carrying out integral annealing heat treatment on the welded orthotropic plate structure, and eliminating welding residual stress generated by a large number of welding among the steel panel, the longitudinal stiffening ribs and the transverse partition plates (beams);
(4) The comprehensive measures greatly improve the integral fatigue resistance of the orthotropic plate structure, solve the century difficult problem of orthotropic weld fatigue cracking, prolong the service lives of the steel panel and the bridge, and can be widely applied to the fields of steel box girder structures and ships;
(5) The welding robot is adopted to implement inner and outer side submerged arc automatic double-sided welding, so that the weld joint and a heat affected zone can be ensured to keep the corrosion resistance consistent with the base metal;
(6) The construction steps are simple, the construction time is flexible, the possibility of collision with other working procedures is avoided, and the efficiency is high.
Drawings
Fig. 1 is a schematic structural view of a lateral support member in the present embodiment;
FIG. 2 is a schematic view of the structure of the connection of the transverse supports and longitudinal stiffening ribs in this embodiment;
fig. 3 is a schematic structural diagram of an orthotropic plate structure and a method for manufacturing the same according to the present embodiment.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Examples
An orthotropic plate structure comprises a steel panel 3, a plurality of transverse supports 1 and a plurality of longitudinal reinforcing ribs 2;
as shown in fig. 1, the plurality of transverse supporting pieces 1 each comprise a horizontal connecting plate 101 and a vertical supporting plate 102, and the plurality of horizontal connecting plates 101 are arranged at equal intervals and are parallel to each other; the bottom of the vertical support plate 102 is welded on the upper surface of the horizontal connection plate 101, and connecting grooves 103 are formed in the top of the vertical support plate 102 at equal intervals along the length direction of the vertical support plate 102.
The cross sections of the longitudinal reinforcing ribs 2 are matched with the connecting grooves 103, and the longitudinal reinforcing ribs 2 are clamped on the connecting grooves 103 of the transverse supporting pieces 1 along the transverse direction and fixed on the connecting grooves 103 in a welding mode; adjacent two of the longitudinal reinforcing ribs 2 are parallel; the longitudinal reinforcing ribs 2 are perpendicular to the vertical support plates 102.
In this embodiment, in order to improve the strength of the transverse support 1, a plurality of reinforcing plates 105 are disposed on the horizontal connecting plate 101 at the connection position of the vertical support plate 102.
In this embodiment, rounded corners 104 are disposed on two sides of the bottom of the connecting groove 103, so that the longitudinal reinforcing ribs 2 are welded on the connecting groove 103, and the strength of the connection between the connecting groove 103 and the longitudinal reinforcing ribs 2 after welding is improved.
The preparation method of the orthotropic plate structure comprises the following steps:
s1, pretreatment: preparing the longitudinal reinforcing ribs and the steel panel, and cleaning the longitudinal reinforcing ribs and the steel panel;
s2, perpendicularly and perpendicularly welding the top of the longitudinal reinforcing rib 2 and the bottom surface of the steel panel 3; simultaneously, the top of the vertical supporting plate 102 is perpendicularly and vertically welded with the back surface of the steel panel 3, and then the vertical supporting plate 102 is welded on the horizontal supporting plate 101;
s3, placing the orthotropic plate structure formed in the S2 into a heat treatment furnace for integral annealing treatment.
Wherein, in step S1, the steel panel plate is subjected to sand blasting rust removal treatment using a metal mixed abrasive formed by mixing 65% steel shot with 35% steel shot. The surface of the treated orthotropic plate should not have water, dust, greasy dirt and the like. The rust removal grade is Sa2.5 grade, the roughness is Rz 50-100 mu m, and the surface of the processed steel plate is subjected to rust prevention treatment immediately to prevent secondary pollution.
Further, in step S1, the steel panel after the sand blasting rust removal treatment is immediately painted with an epoxy zinc-rich paint to form an orthotropic plate rust-proof layer for preventing rust of the steel plate; when in construction, the paint should be uniformly coated, and the paint has no phenomena of leakage spray and dry spray, and has no defects of cracking, sagging, air bubbles and the like. The drying time of the rust preventive layer depends on the on-site environmental conditions, and the drying time is generally 30 minutes at 20 ℃, and no contact and construction operations are allowed before drying.
In the step S2, submerged arc automatic welding is adopted, wherein the welding material is submerged arc welding wires TH 500-NQ-III phi 1.6mm, and the welding parameters are as follows: i is 360-450A, U is 29-34V, welding speed V is 380-430mm/min, and welding position is flat.
Wherein, in step S3, the heat treatment heating equipment is integrally heated by adopting electricity, gas or oil gas and is provided with an automatic control system comprising temperature and time heat treatment elements; the heat treatment process is designed and tested according to factors including yield strength, chemical composition, plate thickness and batch number of plate batch materials.
After the orthotropic plate units obtained by welding in the embodiment are welded and waiting for cooling room temperature, performing appearance inspection on each welding seam, wherein the surface is required to be free of defects such as cracks, unfused, slag inclusion, incomplete filling of arc pits, missing welding and the like, and the appearance quality meets the related specified requirements in the technical Specification for highway bridge construction (JTG/T3650-2020). The internal quality of the welding seam is subjected to nondestructive testing, the ultrasonic requirements reach the grade II qualification, and the magnetic powder requirements reach the grade 1 qualification.
The yield strength, tensile strength and elongation of the weld metal meet the standards and designs, the low-temperature impact absorption power average value and the single value of the weld and the heat affected zone are both larger than 35J, a certain margin is provided on the basis that the impact toughness meets the basic requirement, the hardness of the weld, the heat affected zone and the base metal are also within a reasonable range, and the weld has no welding defects such as air holes, slag inclusion, unfused welding, cracks and the like. The welding standard is proper, each performance of the welded joint can be ensured, the ideal penetration of an external welding molten pool under the action of gravity is ensured, and the appearance of the welded joint is ensured to be better formed.
In the description of the present specification, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present patent and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present patent application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this specification, unless clearly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.
In this specification, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (8)
1. An orthotropic plate structure is characterized by comprising a steel panel, a plurality of transverse supporting pieces and a plurality of longitudinal reinforcing ribs;
the transverse supporting pieces comprise horizontal connecting plates and vertical supporting plates, and the horizontal connecting plates are arranged at equal intervals and are parallel to each other; the bottom of the vertical supporting plate is welded on the upper surface of the horizontal connecting plate, and connecting grooves are formed in the top of the vertical supporting plate at equal intervals along the length direction of the vertical supporting plate;
the cross sections of the longitudinal reinforcing ribs are matched with the connecting grooves, and the longitudinal reinforcing ribs are clamped on the connecting grooves of the transverse supporting pieces along the transverse direction and fixed on the connecting grooves in a welding mode; adjacent two longitudinal reinforcing ribs are parallel; the longitudinal reinforcing ribs are perpendicular to the vertical supporting plates;
the back of the steel panel is welded on two sides of the tops of the longitudinal reinforcing ribs, and the steel panel is horizontal.
2. The orthotropic plate structure of claim 1, wherein the horizontal connecting plates are provided with a plurality of reinforcing plates at the joints of the vertical supporting plates.
3. An orthotropic plate structure as claimed in claim 1 or 2, wherein the connecting grooves are provided with rounded corners on both sides of the bottom.
4. A method of manufacturing an orthotropic plate structure as claimed in claim 3, comprising the steps of:
s1, pretreatment: preparing the longitudinal reinforcing ribs and the steel panel, and cleaning the longitudinal reinforcing ribs and the steel panel;
s2, vertically welding the horizontal connecting part at the top of the longitudinal reinforcing rib and the bottom surface of the steel panel in an orthogonal manner; simultaneously, the top of the vertical supporting plate is perpendicularly and vertically welded with the back of the steel panel, and then the vertical supporting plate is welded on the horizontal supporting plate;
s3, placing the orthotropic plate structure formed in the S2 into a heat treatment furnace for integral annealing treatment.
5. The method of manufacturing an orthotropic plate structure according to claim 4, wherein in step S1, the steel panel plate is sand blasted with a metal mixed abrasive formed by mixing 65% steel shot with 35% steel grit.
6. The method of manufacturing an orthotropic plate structure according to claim 5, wherein in step S3, the orthotropic plate structure after the annealing treatment is immediately painted with an epoxy zinc-rich paint to form an orthotropic plate rust-preventing layer for preventing rust of the steel plate.
7. The method for manufacturing an orthotropic plate structure according to claim 4, wherein in the step S2, submerged arc automatic welding is adopted, the welding material is submerged arc welding wire TH 500-NQ-iii phi 1.6mm, and the welding parameters are as follows: i is 360-450A, U is 29-34V, welding speed V is 380-430mm/min, and welding position is flat.
8. The method for manufacturing an orthotropic plate structure according to claim 4, wherein in step S3, a heat treatment heating apparatus is used for performing integral heating by using electricity, gas or oil gas, and is provided with an automatic control system including temperature and time heat treatment elements; the heat treatment process is designed and tested according to factors including yield strength, chemical composition, plate thickness and batch number of plate batch materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310456762.1A CN116427267A (en) | 2023-04-23 | 2023-04-23 | Orthotropic plate structure and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310456762.1A CN116427267A (en) | 2023-04-23 | 2023-04-23 | Orthotropic plate structure and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116427267A true CN116427267A (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310456762.1A Withdrawn CN116427267A (en) | 2023-04-23 | 2023-04-23 | Orthotropic plate structure and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116427267A (en) |
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2023
- 2023-04-23 CN CN202310456762.1A patent/CN116427267A/en not_active Withdrawn
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